RE: dynamic parameters
Hi, I don't know about indexes, but I can think of a simple solution, Struts-independent (well, not 100%): have all values concatenated in a single hidden attribute that get's submitted, using different tokens for separating different values and for separating different records (by record I mean a set of values). Then it's just about parsing it (the value stored on the corresponding property) on the server side. I know It's not the most elegant solution, but it you are short of time, then it will surely do it. HTH, Freddy. -Mensaje original- De: Nathan Maves [mailto:[EMAIL PROTECTED] Enviado el: martes, 10 de febrero de 2004 1:24 Para: Struts Users Mailing List Asunto: dynamic parameters I have searched but found nothing on this specific example. I have a form that will have n number of elements. Each of these elements will needs it own name. example. list of students is displayed on the screen with two text fields for their first and last name. This is for a mass update page. The only way I can thing of is to have form element like.. text name=#student_id#-#first_name# text name=#student_id#-#last_name# This way in my action I can parse out the student id and then update the corresponding first and last name. Can this be done or is there a better way to do it. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.459 / Virus Database: 258 - Release Date: 25/02/2003 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.459 / Virus Database: 258 - Release Date: 25/02/2003 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: dynamic parameters
First thanks for your time trying to help me. Here is the deal I have a list of elements. NameId Student A 123 Student B 123 Student C 123 Student D 123 Student E 123 Student F 123 and I only have data (first last name) for some random amount of them. On these rows I want the form to create text fields for these items. Student A Student B joe schmoe Student C Student D joe schmoe Student E joe schmoe Student F Since the index from the outside foreach will not work for the indexed properties first and last name I believe that I will have to test if the current student row is equal to the next row in the array of data. If they are then I will have to create the html:text by hand. Nathan Maves Sun Microsystems On Feb 10, 2004, at 1:40 AM, Villalba Arias, Fredy [BILBOMATICA] wrote: Hi, I don't know about indexes, but I can think of a simple solution, Struts-independent (well, not 100%): have all values concatenated in a single hidden attribute that get's submitted, using different tokens for separating different values and for separating different records (by record I mean a set of values). Then it's just about parsing it (the value stored on the corresponding property) on the server side. I know It's not the most elegant solution, but it you are short of time, then it will surely do it. HTH, Freddy. -Mensaje original- De: Nathan Maves [mailto:[EMAIL PROTECTED] Enviado el: martes, 10 de febrero de 2004 1:24 Para: Struts Users Mailing List Asunto: dynamic parameters I have searched but found nothing on this specific example. I have a form that will have n number of elements. Each of these elements will needs it own name. example. list of students is displayed on the screen with two text fields for their first and last name. This is for a mass update page. The only way I can thing of is to have form element like.. text name=#student_id#-#first_name# text name=#student_id#-#last_name# This way in my action I can parse out the student id and then update the corresponding first and last name. Can this be done or is there a better way to do it. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.459 / Virus Database: 258 - Release Date: 25/02/2003 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.459 / Virus Database: 258 - Release Date: 25/02/2003 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: dynamic parameters
Hi, Nathan: This is progress, but I cannot tell what Since the index from the outside foreach will not work for the indexed properties first and last name means. Please clarify. So far I can tell only the following: you have a list of students identified only by first and last name. You want to have a form that gets some more information, i.e. a third bit of information, from them via a text field. There are various reasons why what you are writing is hard to read. Your examples indicate a reality which is unlikely to be true, e.g. you have all the students with the same name such a Joe Schmoe. You apparently are using A, B, etc. to stand in for what you call a NameId. If that is true or not is impossible to tell. Let me try to understand what you want to do. Do you merely want to update student names when you have them stored under student ids? I really cannot tell what you want to do. Whatever you want to do can easily be done, I am sure. It is really hard to tell what you want done. If you are trying to update names alone, then how are you doing this. Are the students doing it? Is an administrator doing it? Is the problem that there are too many students for one page? Is the problem that you don't have them indexed by name? If they are indexed by id, and there are a known number, you an create a Map with the students and use the id as an indexed property to retrieve the students. But, again, your explanation is not readable for me. So, I don't know what you want to do. Want to try again? Michael Michael At 07:52 AM 2/10/2004, you wrote: First thanks for your time trying to help me. Here is the deal I have a list of elements. NameId Student A 123 Student B 123 Student C 123 Student D 123 Student E 123 Student F 123 and I only have data (first last name) for some random amount of them. On these rows I want the form to create text fields for these items. Student A Student B joe schmoe Student C Student D joe schmoe Student E joe schmoe Student F Since the index from the outside foreach will not work for the indexed properties first and last name I believe that I will have to test if the current student row is equal to the next row in the array of data. If they are then I will have to create the html:text by hand. Nathan Maves Sun Microsystems On Feb 10, 2004, at 1:40 AM, Villalba Arias, Fredy [BILBOMATICA] wrote: Hi, I don't know about indexes, but I can think of a simple solution, Struts-independent (well, not 100%): have all values concatenated in a single hidden attribute that get's submitted, using different tokens for separating different values and for separating different records (by record I mean a set of values). Then it's just about parsing it (the value stored on the corresponding property) on the server side. I know It's not the most elegant solution, but it you are short of time, then it will surely do it. HTH, Freddy. -Mensaje original- De: Nathan Maves [mailto:[EMAIL PROTECTED] Enviado el: martes, 10 de febrero de 2004 1:24 Para: Struts Users Mailing List Asunto: dynamic parameters I have searched but found nothing on this specific example. I have a form that will have n number of elements. Each of these elements will needs it own name. example. list of students is displayed on the screen with two text fields for their first and last name. This is for a mass update page. The only way I can thing of is to have form element like.. text name=#student_id#-#first_name# text name=#student_id#-#last_name# This way in my action I can parse out the student id and then update the corresponding first and last name. Can this be done or is there a better way to do it. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.459 / Virus Database: 258 - Release Date: 25/02/2003 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.459 / Virus Database: 258 - Release Date: 25/02/2003 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: dynamic parameters
Sorry for an ambiguity that was in my example. here are the gory details :) I am only using student as an example the real object would only complicate matters. In an action I am retrieving : - a list of all the students objects. This includes their student id. - an array of studentsGrade objects. These objects have a studentId, semester1Grade, semester2Grade in them. Remember that there might be, at most, the same amount of studentGrade objects as there are students. It is the case where there are less that I am concerned in. In the jsp : I only what the form to create text fields for the student if there was data found. This may seem strange but there is a good business reason for this. I need the full list of students to be displayed in the page. With out this everything works great. The list of students is also ordered. Last ditch effort, Nathan On Feb 10, 2004, at 11:43 AM, Michael McGrady wrote: Hi, Nathan: This is progress, but I cannot tell what Since the index from the outside foreach will not work for the indexed properties first and last name means. Please clarify. So far I can tell only the following: you have a list of students identified only by first and last name. You want to have a form that gets some more information, i.e. a third bit of information, from them via a text field. There are various reasons why what you are writing is hard to read. Your examples indicate a reality which is unlikely to be true, e.g. you have all the students with the same name such a Joe Schmoe. You apparently are using A, B, etc. to stand in for what you call a NameId. If that is true or not is impossible to tell. Let me try to understand what you want to do. Do you merely want to update student names when you have them stored under student ids? I really cannot tell what you want to do. Whatever you want to do can easily be done, I am sure. It is really hard to tell what you want done. If you are trying to update names alone, then how are you doing this. Are the students doing it? Is an administrator doing it? Is the problem that there are too many students for one page? Is the problem that you don't have them indexed by name? If they are indexed by id, and there are a known number, you an create a Map with the students and use the id as an indexed property to retrieve the students. But, again, your explanation is not readable for me. So, I don't know what you want to do. Want to try again? Michael Michael At 07:52 AM 2/10/2004, you wrote: First thanks for your time trying to help me. Here is the deal I have a list of elements. NameId Student A 123 Student B 123 Student C 123 Student D 123 Student E 123 Student F 123 and I only have data (first last name) for some random amount of them. On these rows I want the form to create text fields for these items. Student A Student B joe schmoe Student C Student D joe schmoe Student E joe schmoe Student F Since the index from the outside foreach will not work for the indexed properties first and last name I believe that I will have to test if the current student row is equal to the next row in the array of data. If they are then I will have to create the html:text by hand. Nathan Maves Sun Microsystems On Feb 10, 2004, at 1:40 AM, Villalba Arias, Fredy [BILBOMATICA] wrote: Hi, I don't know about indexes, but I can think of a simple solution, Struts-independent (well, not 100%): have all values concatenated in a single hidden attribute that get's submitted, using different tokens for separating different values and for separating different records (by record I mean a set of values). Then it's just about parsing it (the value stored on the corresponding property) on the server side. I know It's not the most elegant solution, but it you are short of time, then it will surely do it. HTH, Freddy. -Mensaje original- De: Nathan Maves [mailto:[EMAIL PROTECTED] Enviado el: martes, 10 de febrero de 2004 1:24 Para: Struts Users Mailing List Asunto: dynamic parameters I have searched but found nothing on this specific example. I have a form that will have n number of elements. Each of these elements will needs it own name. example. list of students is displayed on the screen with two text fields for their first and last name. This is for a mass update page. The only way I can thing of is to have form element like.. text name=#student_id#-#first_name# text name=#student_id#-#last_name# This way in my action I can parse out the student id and then update the corresponding first and last name. Can this be done or is there a better way to do it. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com
RE: dynamic parameters
So is there so way to retrieve the form value seletcions in form of some array or so to be passed to the form Thanks. -Original Message- From: Nathan Maves [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 10, 2004 1:35 PM To: Struts Users Mailing List Subject: Re: dynamic parameters Sorry for an ambiguity that was in my example. here are the gory details :) I am only using student as an example the real object would only complicate matters. In an action I am retrieving : - a list of all the students objects. This includes their student id. - an array of studentsGrade objects. These objects have a studentId, semester1Grade, semester2Grade in them. Remember that there might be, at most, the same amount of studentGrade objects as there are students. It is the case where there are less that I am concerned in. In the jsp : I only what the form to create text fields for the student if there was data found. This may seem strange but there is a good business reason for this. I need the full list of students to be displayed in the page. With out this everything works great. The list of students is also ordered. Last ditch effort, Nathan On Feb 10, 2004, at 11:43 AM, Michael McGrady wrote: Hi, Nathan: This is progress, but I cannot tell what Since the index from the outside foreach will not work for the indexed properties first and last name means. Please clarify. So far I can tell only the following: you have a list of students identified only by first and last name. You want to have a form that gets some more information, i.e. a third bit of information, from them via a text field. There are various reasons why what you are writing is hard to read. Your examples indicate a reality which is unlikely to be true, e.g. you have all the students with the same name such a Joe Schmoe. You apparently are using A, B, etc. to stand in for what you call a NameId. If that is true or not is impossible to tell. Let me try to understand what you want to do. Do you merely want to update student names when you have them stored under student ids? I really cannot tell what you want to do. Whatever you want to do can easily be done, I am sure. It is really hard to tell what you want done. If you are trying to update names alone, then how are you doing this. Are the students doing it? Is an administrator doing it? Is the problem that there are too many students for one page? Is the problem that you don't have them indexed by name? If they are indexed by id, and there are a known number, you an create a Map with the students and use the id as an indexed property to retrieve the students. But, again, your explanation is not readable for me. So, I don't know what you want to do. Want to try again? Michael Michael At 07:52 AM 2/10/2004, you wrote: First thanks for your time trying to help me. Here is the deal I have a list of elements. NameId Student A 123 Student B 123 Student C 123 Student D 123 Student E 123 Student F 123 and I only have data (first last name) for some random amount of them. On these rows I want the form to create text fields for these items. Student A Student B joe schmoe Student C Student D joe schmoe Student E joe schmoe Student F Since the index from the outside foreach will not work for the indexed properties first and last name I believe that I will have to test if the current student row is equal to the next row in the array of data. If they are then I will have to create the html:text by hand. Nathan Maves Sun Microsystems On Feb 10, 2004, at 1:40 AM, Villalba Arias, Fredy [BILBOMATICA] wrote: Hi, I don't know about indexes, but I can think of a simple solution, Struts-independent (well, not 100%): have all values concatenated in a single hidden attribute that get's submitted, using different tokens for separating different values and for separating different records (by record I mean a set of values). Then it's just about parsing it (the value stored on the corresponding property) on the server side. I know It's not the most elegant solution, but it you are short of time, then it will surely do it. HTH, Freddy. -Mensaje original- De: Nathan Maves [mailto:[EMAIL PROTECTED] Enviado el: martes, 10 de febrero de 2004 1:24 Para: Struts Users Mailing List Asunto: dynamic parameters I have searched but found nothing on this specific example. I have a form that will have n number of elements. Each of these elements will needs it own name. example. list of students is displayed on the screen with two text fields for their first and last name. This is for a mass update page. The only way I can thing of is to have form element like.. text name=#student_id#-#first_name# text name=#student_id#-#last_name# This way in my action I can
Re: dynamic parameters
Nathan - I think in a situation like this I would put an if test into the loop. If there is no data for the student, I would make HIDDEN form fields for that student, otherwise I would make the text fields. Then in your action, if the fields are blank, you don't need to worry about updating them. (Although then you need to think about what happens if a users enters blanks into the text fields - maybe add another field to each student for whether the user was allowed to input data or something like that) Matt Bathje - Original Message - From: Nathan Maves [EMAIL PROTECTED] To: Struts Users Mailing List [EMAIL PROTECTED] Sent: Tuesday, February 10, 2004 1:35 PM Subject: Re: dynamic parameters Sorry for an ambiguity that was in my example. here are the gory details :) I am only using student as an example the real object would only complicate matters. In an action I am retrieving : - a list of all the students objects. This includes their student id. - an array of studentsGrade objects. These objects have a studentId, semester1Grade, semester2Grade in them. Remember that there might be, at most, the same amount of studentGrade objects as there are students. It is the case where there are less that I am concerned in. In the jsp : I only what the form to create text fields for the student if there was data found. This may seem strange but there is a good business reason for this. I need the full list of students to be displayed in the page. With out this everything works great. The list of students is also ordered. Last ditch effort, Nathan On Feb 10, 2004, at 11:43 AM, Michael McGrady wrote: Hi, Nathan: This is progress, but I cannot tell what Since the index from the outside foreach will not work for the indexed properties first and last name means. Please clarify. So far I can tell only the following: you have a list of students identified only by first and last name. You want to have a form that gets some more information, i.e. a third bit of information, from them via a text field. There are various reasons why what you are writing is hard to read. Your examples indicate a reality which is unlikely to be true, e.g. you have all the students with the same name such a Joe Schmoe. You apparently are using A, B, etc. to stand in for what you call a NameId. If that is true or not is impossible to tell. Let me try to understand what you want to do. Do you merely want to update student names when you have them stored under student ids? I really cannot tell what you want to do. Whatever you want to do can easily be done, I am sure. It is really hard to tell what you want done. If you are trying to update names alone, then how are you doing this. Are the students doing it? Is an administrator doing it? Is the problem that there are too many students for one page? Is the problem that you don't have them indexed by name? If they are indexed by id, and there are a known number, you an create a Map with the students and use the id as an indexed property to retrieve the students. But, again, your explanation is not readable for me. So, I don't know what you want to do. Want to try again? Michael Michael At 07:52 AM 2/10/2004, you wrote: First thanks for your time trying to help me. Here is the deal I have a list of elements. NameId Student A 123 Student B 123 Student C 123 Student D 123 Student E 123 Student F 123 and I only have data (first last name) for some random amount of them. On these rows I want the form to create text fields for these items. Student A Student B joe schmoe Student C Student D joe schmoe Student E joe schmoe Student F Since the index from the outside foreach will not work for the indexed properties first and last name I believe that I will have to test if the current student row is equal to the next row in the array of data. If they are then I will have to create the html:text by hand. Nathan Maves Sun Microsystems On Feb 10, 2004, at 1:40 AM, Villalba Arias, Fredy [BILBOMATICA] wrote: Hi, I don't know about indexes, but I can think of a simple solution, Struts-independent (well, not 100%): have all values concatenated in a single hidden attribute that get's submitted, using different tokens for separating different values and for separating different records (by record I mean a set of values). Then it's just about parsing it (the value stored on the corresponding property) on the server side. I know It's not the most elegant solution, but it you are short of time, then it will surely do it. HTH, Freddy. -Mensaje original- De: Nathan Maves [mailto:[EMAIL PROTECTED] Enviado el: martes, 10 de febrero de 2004 1:24 Para: Struts Users Mailing List Asunto: dynamic
Re: dynamic parameters
Users Mailing List Asunto: dynamic parameters I have searched but found nothing on this specific example. I have a form that will have n number of elements. Each of these elements will needs it own name. example. list of students is displayed on the screen with two text fields for their first and last name. This is for a mass update page. The only way I can thing of is to have form element like.. text name=#student_id#-#first_name# text name=#student_id#-#last_name# This way in my action I can parse out the student id and then update the corresponding first and last name. Can this be done or is there a better way to do it. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.459 / Virus Database: 258 - Release Date: 25/02/2003 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.459 / Virus Database: 258 - Release Date: 25/02/2003 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
dynamic parameters
I have searched but found nothing on this specific example. I have a form that will have n number of elements. Each of these elements will needs it own name. example. list of students is displayed on the screen with two text fields for their first and last name. This is for a mass update page. The only way I can thing of is to have form element like.. text name=#student_id#-#first_name# text name=#student_id#-#last_name# This way in my action I can parse out the student id and then update the corresponding first and last name. Can this be done or is there a better way to do it. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: dynamic parameters
What you want are called indexed properties in struts. Start here: http://jakarta.apache.org/struts/faqs/indexedprops.html and here: http://www.developer.com/java/ejb/article.php/2233591 Then search the list archives for any specific questions you have, many have been answered. Also, if you are having n number of elements, make sure your form goes into the session scope instead of the request scope. This is probably the biggest issue with indexed properties I have seen. Matt Bathje - Original Message - From: Nathan Maves [EMAIL PROTECTED] To: Struts Users Mailing List [EMAIL PROTECTED] Sent: Monday, February 09, 2004 6:24 PM Subject: dynamic parameters I have searched but found nothing on this specific example. I have a form that will have n number of elements. Each of these elements will needs it own name. example. list of students is displayed on the screen with two text fields for their first and last name. This is for a mass update page. The only way I can thing of is to have form element like.. text name=#student_id#-#first_name# text name=#student_id#-#last_name# This way in my action I can parse out the student id and then update the corresponding first and last name. Can this be done or is there a better way to do it. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: dynamic parameters
u can possibly create a custom class that has firstname and last name.. say something
like
class Student {
private String firstName;
private String lastName;
... getFirstName() ...
... setFirstName(String firstName)
... getLastName() ...
... setLastName(String lastName) ...
}
student[0].firstName
student[0].lastName
student[1].firstName
student[1].lastName
...
student[n].firstName
student[n].lastName
as names in your form...
in the ActionForm u can have something like
setStudent(Student[] students) {...}
setStuden(int index, Student student) {...}
getStudent(int index) {...}
getStuden() {...}
Hope this helps ... :)
-Original Message-
From: Nathan Maves [mailto:[EMAIL PROTECTED]
Sent: Monday, February 09, 2004 4:24 PM
To: Struts Users Mailing List
Subject: dynamic parameters
I have searched but found nothing on this specific example.
I have a form that will have n number of elements. Each of these
elements will needs it own name.
example.
list of students is displayed on the screen with two text fields for
their first and last name.
This is for a mass update page.
The only way I can thing of is to have form element like..
text name=#student_id#-#first_name#
text name=#student_id#-#last_name#
This way in my action I can parse out the student id and then update
the corresponding first and last name.
Can this be done or is there a better way to do it.
-
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For additional commands, e-mail: [EMAIL PROTECTED]
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Re: dynamic parameters
Perfect... The second link was great. Now lets dive a little deeper with my problem. I assume that for form pre-population I will have to set the array value in the form before it gets to the jsp. Say I have a list of students that could be larger then the array of the up-datable fields. I loop though all of the students but only n number of them will have data in the array from the form. Is this possible? I hope I explained this well if not I can call anyone who is willing to listen :) Nathan On Feb 9, 2004, at 5:32 PM, Matt Bathje wrote: What you want are called indexed properties in struts. Start here: http://jakarta.apache.org/struts/faqs/indexedprops.html and here: http://www.developer.com/java/ejb/article.php/2233591 Then search the list archives for any specific questions you have, many have been answered. Also, if you are having n number of elements, make sure your form goes into the session scope instead of the request scope. This is probably the biggest issue with indexed properties I have seen. Matt Bathje - Original Message - From: Nathan Maves [EMAIL PROTECTED] To: Struts Users Mailing List [EMAIL PROTECTED] Sent: Monday, February 09, 2004 6:24 PM Subject: dynamic parameters I have searched but found nothing on this specific example. I have a form that will have n number of elements. Each of these elements will needs it own name. example. list of students is displayed on the screen with two text fields for their first and last name. This is for a mass update page. The only way I can thing of is to have form element like.. text name=#student_id#-#first_name# text name=#student_id#-#last_name# This way in my action I can parse out the student id and then update the corresponding first and last name. Can this be done or is there a better way to do it. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: dynamic parameters
Nathan, this looks like you are just having people do your coding. This is not a struts question. This is just a coding question. Anyway, the answer to your question is that of course that is possible. Why wouldn't it be possible? All you have to do is to stop at n. At 05:11 PM 2/9/2004, you wrote: Perfect... The second link was great. Now lets dive a little deeper with my problem. I assume that for form pre-population I will have to set the array value in the form before it gets to the jsp. Say I have a list of students that could be larger then the array of the up-datable fields. I loop though all of the students but only n number of them will have data in the array from the form. Is this possible? I hope I explained this well if not I can call anyone who is willing to listen :) Nathan On Feb 9, 2004, at 5:32 PM, Matt Bathje wrote: What you want are called indexed properties in struts. Start here: http://jakarta.apache.org/struts/faqs/indexedprops.html and here: http://www.developer.com/java/ejb/article.php/2233591 Then search the list archives for any specific questions you have, many have been answered. Also, if you are having n number of elements, make sure your form goes into the session scope instead of the request scope. This is probably the biggest issue with indexed properties I have seen. Matt Bathje - Original Message - From: Nathan Maves [EMAIL PROTECTED] To: Struts Users Mailing List [EMAIL PROTECTED] Sent: Monday, February 09, 2004 6:24 PM Subject: dynamic parameters I have searched but found nothing on this specific example. I have a form that will have n number of elements. Each of these elements will needs it own name. example. list of students is displayed on the screen with two text fields for their first and last name. This is for a mass update page. The only way I can thing of is to have form element like.. text name=#student_id#-#first_name# text name=#student_id#-#last_name# This way in my action I can parse out the student id and then update the corresponding first and last name. Can this be done or is there a better way to do it. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
dynamic parameters to DynaActionForm
is it possible to have dynamic parameters sent to to a dyna form? I do not know how many or the name of the parameters that are being sent? Nathan - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: dynamic parameters to DynaActionForm
Look at IndexedProperties: http://jakarta.apache.org/struts/faqs/indexedprops.html robert -Original Message- From: Nathan Maves [mailto:[EMAIL PROTECTED] Sent: Thursday, January 08, 2004 1:02 PM To: Struts Users Mailing List Subject: dynamic parameters to DynaActionForm is it possible to have dynamic parameters sent to to a dyna form? I do not know how many or the name of the parameters that are being sent? Nathan - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: dynamic parameters to DynaActionForm
Robert, I have been researching all morning and still can not find a good answer. I need to send the action a set of parameters like.. param1 param2 param3 . . . param# The amount of parameters in the form are dynamic. How or what type of object would you use in a form bean. Nathan On Jan 8, 2004, at 11:18 AM, Robert Taylor wrote: Look at IndexedProperties: http://jakarta.apache.org/struts/faqs/indexedprops.html robert -Original Message- From: Nathan Maves [mailto:[EMAIL PROTECTED] Sent: Thursday, January 08, 2004 1:02 PM To: Struts Users Mailing List Subject: dynamic parameters to DynaActionForm is it possible to have dynamic parameters sent to to a dyna form? I do not know how many or the name of the parameters that are being sent? Nathan - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: dynamic parameters to DynaActionForm
Nathan, Try a map backed form http://www.mail-archive.com/[EMAIL PROTECTED]/msg88704.html -Richard -Original Message- From: Nathan Maves [mailto:[EMAIL PROTECTED] Sent: Thursday, January 08, 2004 12:13 PM To: Struts Users Mailing List Subject: Re: dynamic parameters to DynaActionForm Robert, I have been researching all morning and still can not find a good answer. I need to send the action a set of parameters like.. param1 param2 param3 . . . param# The amount of parameters in the form are dynamic. How or what type of object would you use in a form bean. Nathan On Jan 8, 2004, at 11:18 AM, Robert Taylor wrote: Look at IndexedProperties: http://jakarta.apache.org/struts/faqs/indexedprops.html robert -Original Message- From: Nathan Maves [mailto:[EMAIL PROTECTED] Sent: Thursday, January 08, 2004 1:02 PM To: Struts Users Mailing List Subject: dynamic parameters to DynaActionForm is it possible to have dynamic parameters sent to to a dyna form? I do not know how many or the name of the parameters that are being sent? Nathan - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: dynamic parameters to DynaActionForm
Nathan, could you explain in a little more detail:
Is is a use case where you retrieve a value from somewhere
which tells you how many empty fields to generate and this value
could vary. Then these empty fields are populated with user input
and sent to the server to update the database.
If so, you could do the following:
I would also use org.apache.commons.collections.ListUtils.lazyList()
implementation.
http://jakarta.apache.org/commons/collections/api/org/apache/commons/collect
ions/ListUtils.html#lazyList(java.util.List,%20org.apache.commons.collection
s.Factory)
The lazyList implementation will create a new object using the
specified Factory when Struts indexes into a position in the list
which is null.
form-bean name=myForm
type=com.company.MyForm
form-property name=colors
type=java.util.List/
/form-bean
Subclass your DynaActionForm and override the reset()
public final class MyForm extends DynaActionForm {
private static Logger logger = Logger
.getLogger(SearchContractsForm.class.getName());
/**
* Reset all bean properties to their default state. This method is
* called before the properties are repopulated by the controller
servlet.
* p
* The default implementation uses the initial value specified in the
* FormPropertyConfig element for each property.
*
* @param mapping The mapping used to select this instance
* @param request The servlet request we are processing
*/
public void reset(ActionMapping mapping, HttpServletRequest request) {
super.reset(mapping, request);
List colors = ListUtils.lazyList(new ArrayList(), new
StringFactory());
this.set(colors, colors);
}
/**
* codeStringFactory/code
*
* @see org.apache.commons.ListUtils
*/
class StringFactory implements Factory {
/**
* Create a new instance of the specified object
*/
public Object create() {
return new String();
}
}
}
Define an action which is invoked prior to displaying the jsp.
In the action populate the colors data member with a List of
empty Strings.
In the page do one of the following:
One way to display the values is like so:
c:forEach var=color items${myForm.colors} varStatus=status
c:set var=property value=colors[${status.index}]/
html_el:text property=${property}/
/c:forEach
Another way would be to leverage the Struts tags:
logic:iterate id=color name=myForm property=colors
html:text name=colors property=color indexed=true/
/logic:iterate
Either way should render html like:
input type=text name=colors[0] value=/
input type=text name=colors[1] value=/
input type=text name=colors[2] value=/
input type=text name=colors[3] value=/
input type=text name=colors[4] value=/
...
input type=text name=colors[n] value=/
Upon submitting the form, Struts will invoke reset() and
populate the colors data member with a new lazy list.
When Struts indexes into an empty location, lazy list will
first create a new String at that location and then
Struts will populate that with the value sent from the client.
That should give you a better idea of how to use indexed properties.
hth,
robert
-Original Message-
From: Nathan Maves [mailto:[EMAIL PROTECTED]
Sent: Thursday, January 08, 2004 3:13 PM
To: Struts Users Mailing List
Subject: Re: dynamic parameters to DynaActionForm
Robert,
I have been researching all morning and still can not find a good
answer.
I need to send the action a set of parameters like..
param1
param2
param3
.
.
.
param#
The amount of parameters in the form are dynamic. How or what type of
object would you use in a form bean.
Nathan
On Jan 8, 2004, at 11:18 AM, Robert Taylor wrote:
Look at IndexedProperties:
http://jakarta.apache.org/struts/faqs/indexedprops.html
robert
-Original Message-
From: Nathan Maves [mailto:[EMAIL PROTECTED]
Sent: Thursday, January 08, 2004 1:02 PM
To: Struts Users Mailing List
Subject: dynamic parameters to DynaActionForm
is it possible to have dynamic parameters sent to to a dyna form?
I do not know how many or the name of the parameters that are being
sent?
Nathan
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html:link with several dynamic parameters
Hi, I'v got a link that uses dynamic and static parameters at the same time. html:link page=/Action.do?sort=id paramName=myForm paramId=mySelection paramProperty=mySelectionID/html:link Now I need more then one dynamic parameter. How can I add it ? Do I just need to repeat paramName=myForm paramId=mySecondSelection ? If so, how to seperate the 2 dynamic parameters ? thx in advance, marcus -- To unsubscribe, e-mail: mailto:struts-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:struts-user-help;jakarta.apache.org
Re: html:link with several dynamic parameters
Marcus, Depending on which version of Struts you're using, check out: http://jakarta.apache.org/struts/doc-1.0.2/struts-html.html#link or http://jakarta.apache.org/struts/userGuide/struts-html.html#link Specifically, note that you can provide a Map that contains all of the request parameters for the link. Quoting Marcus Biel: Hi, I'v got a link that uses dynamic and static parameters at the same time. html:link page=/Action.do?sort=id paramName=myForm paramId=mySelection paramProperty=mySelectionID/html:link Now I need more then one dynamic parameter. How can I add it ? Do I just need to repeat paramName=myForm paramId=mySecondSelection ? If so, how to seperate the 2 dynamic parameters ? thx in advance, marcus -- Kris Schneider mailto:kris;dotech.com D.O.Tech http://www.dotech.com/ -- To unsubscribe, e-mail: mailto:struts-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:struts-user-help;jakarta.apache.org
Re: html:link with several dynamic parameters
Of course I already had a look at this page, but I need several dynamic parameters, and about that nothing is told. About the map: I don't know how to exactly use it, plus I doubt I could use it, as the parameters I need are in different forms. marcus [EMAIL PROTECTED] schrieb: Marcus, Depending on which version of Struts you're using, check out: http://jakarta.apache.org/struts/doc-1.0.2/struts-html.html#link or http://jakarta.apache.org/struts/userGuide/struts-html.html#link Specifically, note that you can provide a Map that contains all of the request parameters for the link. -- To unsubscribe, e-mail: mailto:struts-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:struts-user-help;jakarta.apache.org
Re: html:link with several dynamic parameters
Maybe I'm missing the intent of what you're trying to do, but the entire point of the Map is to contain several dynamic parameters. The html:link tag uses each Map key as the name of a request parameter and the associated Map value as the String or String array parameter value(s). I can't think of how you could get much more dynamic. To pull data out of a number of different forms, they'll have to have been populated and stored in session scope prior to the request that results in the JSP with your html:link tag. The easiest thing to do would be to have an Action collect the data from the forms, create and populate the Map, store it as a request attribute and then forward to the JSP. Quoting Marcus Biel [EMAIL PROTECTED]: Of course I already had a look at this page, but I need several dynamic parameters, and about that nothing is told. About the map: I don't know how to exactly use it, plus I doubt I could use it, as the parameters I need are in different forms. marcus [EMAIL PROTECTED] schrieb: Marcus, Depending on which version of Struts you're using, check out: http://jakarta.apache.org/struts/doc-1.0.2/struts-html.html#link or http://jakarta.apache.org/struts/userGuide/struts-html.html#link Specifically, note that you can provide a Map that contains all of the request parameters for the link. -- To unsubscribe, e-mail: mailto:struts-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:struts-user-help;jakarta.apache.org -- Kris Schneider mailto:kris;dotech.com D.O.Tech http://www.dotech.com/ -- To unsubscribe, e-mail: mailto:struts-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:struts-user-help;jakarta.apache.org
Re: html:link with several dynamic parameters
You need to use the Map feature to include more than one parameter. I suggest using the JSTL's c:url tag instead. That tag is standard and handles multiple parameters much better than html:link David From: Marcus Biel [EMAIL PROTECTED] Reply-To: Struts Users Mailing List [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: html:link with several dynamic parameters Date: Mon, 04 Nov 2002 09:35:30 +0100 Hi, I'v got a link that uses dynamic and static parameters at the same time. html:link page=/Action.do?sort=id paramName=myForm paramId=mySelection paramProperty=mySelectionID/html:link Now I need more then one dynamic parameter. How can I add it ? Do I just need to repeat paramName=myForm paramId=mySecondSelection ? If so, how to seperate the 2 dynamic parameters ? thx in advance, marcus -- To unsubscribe, e-mail: mailto:struts-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:struts-user-help;jakarta.apache.org _ Get a speedy connection with MSN Broadband. Join now! http://resourcecenter.msn.com/access/plans/freeactivation.asp -- To unsubscribe, e-mail: mailto:struts-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:struts-user-help;jakarta.apache.org
RE: html:link with several dynamic parameters
You *should* be able to use the Map approach. Simply build a map whose keys are the
expected parameter names and the corresponding values are the data you wish to send.
For example:
html:link forward=foo property=paramsClick Me!/html:link
In your form bean, the getter getParams() returns a Map such as:
public Map getParams() {
Map map = new Map();
map.put(a, apple);
map.put(b, boy);
map.put(c, cat);
return map;
}
The action that is called will receive: ?a=appleb=boyc=cat
Sri
-Original Message-
From: Marcus Biel [mailto:Marcus.Biel;bmw.de]
Sent: Monday, November 04, 2002 9:00 AM
To: [EMAIL PROTECTED]
Subject: Re: html:link with several dynamic parameters
Of course I already had a look at this page,
but I need several dynamic parameters, and about that nothing is told.
About the map:
I don't know how to exactly use it, plus I doubt I could use it, as the parameters I
need are in different forms.
marcus
[EMAIL PROTECTED] schrieb:
Marcus,
Depending on which version of Struts you're using, check out:
http://jakarta.apache.org/struts/doc-1.0.2/struts-html.html#link
or
http://jakarta.apache.org/struts/userGuide/struts-html.html#link
Specifically, note that you can provide a Map that contains all of the
request parameters for the link.
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Re: html:link with several dynamic parameters
Just a note that html:link provides some Struts-specific features that may make you think twice before converting to JSTL's c:url: Ability to specify a global ActionForward. Transactional control token support. Works with a JSP 1.1 container (okay, so that's not Struts-specific). I'm also curious why you'd say that c:param tags are much better than a Map for handling multiple patameters. Quoting David Graham [EMAIL PROTECTED]: You need to use the Map feature to include more than one parameter. I suggest using the JSTL's c:url tag instead. That tag is standard and handles multiple parameters much better than html:link David -- Kris Schneider mailto:kris;dotech.com D.O.Tech http://www.dotech.com/ -- To unsubscribe, e-mail: mailto:struts-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:struts-user-help;jakarta.apache.org
Re: html:link with several dynamic parameters
Yes, the ability to specify an ActionForward is nice but not enough to make me use html:link. The c:param tags are better than using a map because you don't have to write scriptlet code to initialize the map (you could init. the map in other places but it's still a pain). It's more efficient and clearer to specify individual param elements. David From: Kris Schneider [EMAIL PROTECTED] Reply-To: Struts Users Mailing List [EMAIL PROTECTED] To: Struts Users Mailing List [EMAIL PROTECTED] Subject: Re: html:link with several dynamic parameters Date: Mon, 4 Nov 2002 10:14:47 -0500 Just a note that html:link provides some Struts-specific features that may make you think twice before converting to JSTL's c:url: Ability to specify a global ActionForward. Transactional control token support. Works with a JSP 1.1 container (okay, so that's not Struts-specific). I'm also curious why you'd say that c:param tags are much better than a Map for handling multiple patameters. Quoting David Graham [EMAIL PROTECTED]: You need to use the Map feature to include more than one parameter. I suggest using the JSTL's c:url tag instead. That tag is standard and handles multiple parameters much better than html:link David -- Kris Schneider mailto:kris;dotech.com D.O.Tech http://www.dotech.com/ -- To unsubscribe, e-mail: mailto:struts-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:struts-user-help;jakarta.apache.org _ Get faster connections -- switch to MSN Internet Access! http://resourcecenter.msn.com/access/plans/default.asp -- To unsubscribe, e-mail: mailto:struts-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:struts-user-help;jakarta.apache.org
Re: html:link with several dynamic parameters
Of course, you can always combine approaches:
jsp:useBean id=paramMap class=java.util.HashMap/
c:set target=${paramMap} property=p1 value=v1/
c:set target=${paramMap} property=p2 value=v2/
html:link forward=foo name=paramMap/
But in reality, I'd be more likely to create and populate the Map in an Action
that fronts the JSP. The Map would either end up as a scoped attribute or as a
property on an ActionForm or some other bean. I don't consider that much of a
pain and there's certainly no scriptlet code.
One other thing to consider about Map vs. c:param tags is direct support for
multi-valued parameters. You can dump a String[] into a Map value and
html:link will use it to produce a request parameter (whose name is the Map
key) for each array element. You'd have to use multiple c:param tags with the
same name attribute to accomplish something similar. I'd love to see c:param
incorporate that functionality, maybe I'll submit an RFE...
Quoting David Graham [EMAIL PROTECTED]:
Yes, the ability to specify an ActionForward is nice but not enough to make
me use html:link. The c:param tags are better than using a map because
you don't have to write scriptlet code to initialize the map (you could
init. the map in other places but it's still a pain). It's more efficient
and clearer to specify individual param elements.
David
From: Kris Schneider [EMAIL PROTECTED]
Reply-To: Struts Users Mailing List [EMAIL PROTECTED]
To: Struts Users Mailing List [EMAIL PROTECTED]
Subject: Re: html:link with several dynamic parameters
Date: Mon, 4 Nov 2002 10:14:47 -0500
Just a note that html:link provides some Struts-specific features that
may
make you think twice before converting to JSTL's c:url:
Ability to specify a global ActionForward.
Transactional control token support.
Works with a JSP 1.1 container (okay, so that's not Struts-specific).
I'm also curious why you'd say that c:param tags are much better than a
Map
for handling multiple patameters.
Quoting David Graham [EMAIL PROTECTED]:
You need to use the Map feature to include more than one parameter. I
suggest using the JSTL's c:url tag instead. That tag is standard and
handles multiple parameters much better than html:link
David
--
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D.O.Tech http://www.dotech.com/
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URGENT!!! Dynamic parameters in App Resources for error handling
Hi all, I have been pretty happy using struts 1.0.2 for some time now. But now i have a problem. Please help. I know that we can user parameterized messages in the App Resources file for error messages. Depending on the no of parameters i can have an errors.add() method pass the parameters. But the problem is that i do not know in advance how many parameters i may need to pass? Any workaround guys? Also is there a way that i can access the message in App Resources File and modify it at runtime??? Pointers to a working code would be excellent. Regards, Tarun Sainanee TCS Delhi -- Finance is the art of passing money from hand to hand until it finally disappears. -- Robert W. Sarnoff
RE: [MessageResources] URGENT!!! Dynamic parameters in App Resources for error handling
-Original Message- From: Tarun Sainanee [mailto:[EMAIL PROTECTED]] Sent: Saturday, August 31, 2002 11:05 AM Hi all, I have been pretty happy using struts 1.0.2 for some time now. But now i have a problem. Please help. I know that we can use parameterized messages in the App Resources file for error messages. Depending on the no of parameters i can have an errors.add() method pass the parameters. But the problem is that i do not know in advance how many parameters i may need to pass? Any workaround guys? Instead of using getMessage(key, arg0, arg1, etc, etc use getMessage(key, args[]) Also is there a way that i can access the message in App Resources File and modify it at runtime??? my-best-guess The default implementation of MessageResources (PropertyMessageResources) does not provide for any way to manipulate the underlying HashMap at runtime. However, I guess you could hack around this with your own implementation (not recommended). Myself and a few others are looking at creating a JDBCMessageResources that will probably provide a reload method. So, I guess, in a way that would allow someone to modify at runtime. /my-best-guess Pointers to a working code would be excellent. Regards, Tarun Sainanee TCS Delhi Hope that helps James Mitchell Software Engineer\Struts Evangelist Struts-Atlanta, the Open Minded Developer Network http://www.open-tools.org/struts-atlanta -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
using link with multiple dynamic parameters
Hi, my problem is as follows: I would like to use the html:link tag with multiple dynamic parameters. I've tried to use the a java.util.Map, but it seems to handle only fixed values. Please, correct me if I'm wrong. In the example I'm iterating through a company list. I create two links for each company in the list. The first retrieves sets the company id in the companyID parameter. The second creates a link with the company name in the companyName parameter. Now, the question, how do I create a link with both parameters in the same link? I would like to create a link as below for each company in the list: /company.do?flow=viewcompanyID=6companyName=test table logic:iterate name=companyList id=company tr td html:link forward=viewCompany paramID=companyID paramName=company paramProperty=ID bean:write name=company property=name//html:link /td td html:link forward=viewCompany paramID=companyName paramName=company paramProperty=name bean:write name=company property=name//html:link /td /tr /logic:iterate /table The global action forward viewCompany equals company.do?flow=view Any help and hints would be appreciated. Thanks! //Anna __ Do You Yahoo!? Listen to your Yahoo! Mail messages from any phone. http://phone.yahoo.com
Fw:calling jsp with dynamic parameters
Hi, I'm novice in struts, I want : 1)to make my jsp (clientslist.jsp) display a dynamically constructed list of objects (for example a list of clients) 2)When user select one of the client in the list, I want to call another jsp, for example clientDetail.jsp passing client nmber in argument. How can use struts (Action et Form) to get the selected client. I did'nt find any tag generating dynamical URL with argument. Thanks
