RE: [Nested Tags] Frustration..Should this work?
A really subtle problem. Remind me to make this advice available some place else when I'm done (like a mail archive?)... :) Trap one: It sounds like the bean reference is a collection itself. A little more background clarity... The nested tags never actually define references, they simply construct the nested property property for when a tag really needs it, like a nested text tag or whatever. So, with this root tag being the collection, it will actually try and make a property that looks like [0] rather than myProperty[0]. Basically, when BeanUtils tries to apply the property it's having issues. To get around this, have the collection one level down in a really simple bean, and make the bean reference to that. This will kick everything off with a proper name in front of that index value, eg: listProperty[5] All in all, nested properties must have at least one substantial named property. They can't just go this/ against the root bean, as there's no name for BeanUtils to play with, even for children as their evaluation will be .something, the dot on the front assumes a nesting level and it all falls down. Trap two: This is actually because of the first problem. When the child tags are trying to do their thing, they're simply appending to the index. From above you can see that the follow-on for a child will be [5].somethingProperty. Once again, the property is just BeanUtils having an issue. Summary: Just keep in mind that the nested tags are all about managing the property property so BeanUtils can do its thing. We need that meaningful property to start off with. nested:iterate property=somethingMeaningful I'm quite sure that putting a bean around that top collection will make things easier. Using this/ and such is really just a helper for when you need the the object itself in a collection. Without a properly set up parent, it all falls down. On a completely different note... I just want to thank Sri for really putting in some effort to help people get around the nature of the nested tags. When all the list comes down into my email client and there's a nested problem, one from Sri usually follows smartly. The nested tags have an esoteric following (that I know of), no-one on this list goes out the their way to recommend them outside of the old list in lists problem, whatever (I'm curious to see if they even get a mention in any of these spiffy new books... :). They mostly snag new users who haven't had an old die-hard bend their ear about best (not necessarily pragmatic) practices :) It is a fact however, that they can truly make life easier. I can't watch the list as often as I'd like, and it's been a big reassurance than the users have somewhere to turn with issues. Sri's one of the peoples that make this list a great [ot] Impact with wall resource. How many people apologise for a not leading to the answer?... Thanks again Sri. Arron. On Thu, 2002-11-28 at 03:07, [EMAIL PROTECTED] wrote: Thank you for reminding me of that link. I tried ./value and this/value without success. Even though I use the nested:form as the root..for this iterate tag I want to tell it to look to an object in page scope instead of the form bean. That is what I thought the combinations of name and property were all about.From docs: ** The collection to be iterated over must be specified in one of the following ways: As a runtime expression specified as the value of the collection attribute. As a JSP bean specified by the name attribute. As the property, specified by the property, of the JSP bean specified by the name attribute. I understand that the name is not needed by the nested tags (thats why I use them so much :-) ), but the nested docs simply point to the docs for the standard logic tags. The nested:iterate seems to work as expected, but the nested equal and write either do not see the current object exposed by nested:iterate OR the nested:iterate is not exposing the current object. I guess my original question still is: should this code work? nested:define id=collectionCode name=%= WebConstants.COLLECTIONCODE_KEY % property=list/ nested:define id=col property=collectionCode type =java.lang.String/ nested:iterate name=collectionCode nested:equal property=value value=%= col % nested:write property=label/ /nested:equal /nested:iterate Thanks for the help.. Sri Sankaran [EMAIL PROTECTED] on 11/27/2002 09:09:59 AM Please respond to Struts Users Mailing List [EMAIL PROTECTED] To:Struts Users Mailing List [EMAIL PROTECTED] cc: Subject:RE: [Nested Tags] Frustration..Should this work? I suspected a problem to be with the iterate since that's what your stack trace suggests. Also, look at Arron's reply to an earlier post (by you, in fact!) http://marc.theaimsgroup.com/?l=struts-userm=103584892423199w=2. He states that the name attribute is ignored. Given that I don't know how
RE: [Nested Tags] Frustration..Should this work? - Future?
Thank you, that makes things clearer. Arron Bates wrote: The nested tags have an esoteric following (that I know of), no-one on this list goes out the their way to recommend them outside of the old list in lists problem, whatever (I'm curious to see if they even get a mention in any of these spiffy new books... :). It is true that I started using them because of lists in lists thing. I used them in combination with ListUtils.LazyList in commons collections and they worked well. One of the biggest things I like about them is that I can replace the countless bean:write name=formBeanName property=xyz/ with nested:write property=xyz / It always seemed odd to me that the html:text was nested but the bean:write needed the name of the form bean.. They make things so easy that I just use them everywhere without even thinking about some of the issues. I have one big question: I seems that everyone is talking JSTL, struts-EL ect.. How does the nested library fit into this? Does JSTL have the power of nested tags? Will there be nested-EL...? Thanks again. -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: [Nested Tags] Frustration..Should this work?
I wonder if this would work nested:root name=pageList nested:iterate property=this/ %-- etc --% /nested:iterate /nested:root Sri -Original Message- From: Sri Sankaran Sent: Wednesday, November 27, 2002 9:13 AM To: Struts Users Mailing List Subject: RE: [Nested Tags] Frustration..Should this work? Is this happening inside a nested:form? If so, I am fairly certain that nested:iterate ignores the value of its name attribute. That would explain why your nested:iterate name=pageList isn't working. Also, you probably recognize the problem with changing it to nested:iterate property=pageList That wont work since pageList isn't a property of your form bean. So you'll have to specify a nested:root to tell the nested structure the root node. However, I see that pageList isn't contained within another bean either. There is a way around this situation; it just isn't coming to meI'll keep looking. Anyway hope this gets your started. Sri -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Tuesday, November 26, 2002 4:48 PM To: [EMAIL PROTECTED] Subject: [Nested Tags] Frustration..Should this work? Greetings: All I am trying to do is display a a selected item form a list. - pageList is standard java.util.List of LabelValueBeans set in page scope. - cc is a String pulled out of the form bean and set to page scope. Using the nested tags my first approach was this: nested:iterate name=pageList nested:equal property=value value=%= cc % nested:write property=label/ /nested:equal /nested:iterate But to get it working I am forced to redo it like this: nested:iterate id=it name=pageList type=org...LabelValueBean logic:equal name=it property=value value=%= cc % bean:write name=it property=label/ /logic:equal /nested:iterate Before I report this to bugzilla, I would like it if someone could tell me if I am doing something wrong. The error I get is: 2002-11-26 15:32:23 ApplicationDispatcher[/ar] Servlet.service() for servlet jsp threw exception java.lang.NullPointerException at java.util.Hashtable.put(Hashtable.java:394) at org.apache.jasper.runtime.PageContextImpl.setAttribute(PageContextImpl.java:229) at org.apache.struts.taglib.logic.IterateTag.doStartTag(IterateTag.java:390) at org.apache.struts.taglib.nested.logic.NestedIterateTag.doStartTag(NestedIterateTag.java:121) at org.apache.jsp.DetailedProfileReadOnlyForm$jsp._jspService(DetailedProfileReadOnlyForm$jsp.java:336) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: [Nested Tags] Frustration..Should this work?
Thanks for the reply: It is inside a nested form but I am getting these values by setting to page scope. The nested iterate has no problem reading the collection. The problem is the equal and write tag *inside* the iterate. They only work if I change them to their non nested versions and explicitly set an id to read by the *inner* tags. ** Summary of code below ** The first define tag grabs a wrapper object from application scope and gets the internal List and sets it to page scope - This works. The second define tag gets a value from the form bean (using a nested form) and set it to page scope. - This works. The nested:iterate tag gets the collectionCode from page scope. - This Works. The nested:equal tag *should* use property=value from each LabelValueBean in the List - This does not work. * This code works nested:define id=collectionCode name=%= WebConstants.COLLECTIONCODE_KEY % property=list/ nested:define id=col property=collectionCode type=java.lang.String/ nested:iterate id=item name=collectionCode type=com.nlg.ar.common.datatransfer.vo.LabelValueBean logic:equal name=item property=value value=%= col % bean:write name=item property=label/ /logic:equal /nested:iterate * This code does NOT work - but I think that it should *** nested:define id=collectionCode name=%= WebConstants.STATICLIST_COLLECTIONCODE_KEY % property=list/ nested:define id=col property=collectionCode type=java.lang.String/ nested:iterate name=collectionCode nested:equal property=value value=%= col % nested:write property=label/ /nested:equal /nested:iterate Sri Sankaran [EMAIL PROTECTED] on 11/27/2002 08:16:06 AM Please respond to Struts Users Mailing List [EMAIL PROTECTED] To:Struts Users Mailing List [EMAIL PROTECTED] cc: Subject:RE: [Nested Tags] Frustration..Should this work? I wonder if this would work nested:root name=pageList nested:iterate property=this/ %-- etc --% /nested:iterate /nested:root Sri -Original Message- From: Sri Sankaran Sent: Wednesday, November 27, 2002 9:13 AM To: Struts Users Mailing List Subject: RE: [Nested Tags] Frustration..Should this work? Is this happening inside a nested:form? If so, I am fairly certain that nested:iterate ignores the value of its name attribute. That would explain why your nested:iterate name=pageList isn't working. Also, you probably recognize the problem with changing it to nested:iterate property=pageList That wont work since pageList isn't a property of your form bean. So you'll have to specify a nested:root to tell the nested structure the root node. However, I see that pageList isn't contained within another bean either. There is a way around this situation; it just isn't coming to meI'll keep looking. Anyway hope this gets your started. Sri -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Tuesday, November 26, 2002 4:48 PM To: [EMAIL PROTECTED] Subject: [Nested Tags] Frustration..Should this work? Greetings: All I am trying to do is display a a selected item form a list. - pageList is standard java.util.List of LabelValueBeans set in page scope. - cc is a String pulled out of the form bean and set to page scope. Using the nested tags my first approach was this: nested:iterate name=pageList nested:equal property=value value=%= cc % nested:write property=label/ /nested:equal /nested:iterate But to get it working I am forced to redo it like this: nested:iterate id=it name=pageList type=org...LabelValueBean logic:equal name=it property=value value=%= cc % bean:write name=it property=label/ /logic:equal /nested:iterate Before I report this to bugzilla, I would like it if someone could tell me if I am doing something wrong. The error I get is: 2002-11-26 15:32:23 ApplicationDispatcher[/ar] Servlet.service() for servlet jsp threw exception java.lang.NullPointerException at java.util.Hashtable.put(Hashtable.java:394) at org.apache.jasper.runtime.PageContextImpl.setAttribute(PageContextImpl.java:229) at org.apache.struts.taglib.logic.IterateTag.doStartTag(IterateTag.java:390) at org.apache.struts.taglib.nested.logic.NestedIterateTag.doStartTag(NestedIterateTag.java:121) at org.apache.jsp.DetailedProfileReadOnlyForm$jsp. _jspService(DetailedProfileReadOnlyForm$jsp.java:336) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail
RE: [Nested Tags] Frustration..Should this work?
I suspected a problem to be with the iterate since that's what your stack trace suggests. Also, look at Arron's reply to an earlier post (by you, in fact!) http://marc.theaimsgroup.com/?l=struts-userm=103584892423199w=2. He states that the name attribute is ignored. Given that I don't know how the working version works. I trust by works you mean that you are able to display a collection of label values. Have you tried looking at what's going on at line 121 of NestedIterateTag? Sorry I don't have any answers. Sri -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 27, 2002 9:49 AM To: Struts Users Mailing List Subject: RE: [Nested Tags] Frustration..Should this work? Thanks for the reply: It is inside a nested form but I am getting these values by setting to page scope. The nested iterate has no problem reading the collection. The problem is the equal and write tag *inside* the iterate. They only work if I change them to their non nested versions and explicitly set an id to read by the *inner* tags. ** Summary of code below ** The first define tag grabs a wrapper object from application scope and gets the internal List and sets it to page scope - This works. The second define tag gets a value from the form bean (using a nested form) and set it to page scope. - This works. The nested:iterate tag gets the collectionCode from page scope. - This Works. The nested:equal tag *should* use property=value from each LabelValueBean in the List - This does not work. * This code works nested:define id=collectionCode name=%= WebConstants.COLLECTIONCODE_KEY % property=list/ nested:define id=col property=collectionCode type=java.lang.String/ nested:iterate id=item name=collectionCode type=com.nlg.ar.common.datatransfer.vo.LabelValueBean logic:equal name=item property=value value=%= col % bean:write name=item property=label/ /logic:equal /nested:iterate * This code does NOT work - but I think that it should *** nested:define id=collectionCode name=%= WebConstants.STATICLIST_COLLECTIONCODE_KEY % property=list/ nested:define id=col property=collectionCode type=java.lang.String/ nested:iterate name=collectionCode nested:equal property=value value=%= col % nested:write property=label/ /nested:equal /nested:iterate Sri Sankaran [EMAIL PROTECTED] on 11/27/2002 08:16:06 AM Please respond to Struts Users Mailing List [EMAIL PROTECTED] To:Struts Users Mailing List [EMAIL PROTECTED] cc: Subject:RE: [Nested Tags] Frustration..Should this work? I wonder if this would work nested:root name=pageList nested:iterate property=this/ %-- etc --% /nested:iterate /nested:root Sri -Original Message- From: Sri Sankaran Sent: Wednesday, November 27, 2002 9:13 AM To: Struts Users Mailing List Subject: RE: [Nested Tags] Frustration..Should this work? Is this happening inside a nested:form? If so, I am fairly certain that nested:iterate ignores the value of its name attribute. That would explain why your nested:iterate name=pageList isn't working. Also, you probably recognize the problem with changing it to nested:iterate property=pageList That wont work since pageList isn't a property of your form bean. So you'll have to specify a nested:root to tell the nested structure the root node. However, I see that pageList isn't contained within another bean either. There is a way around this situation; it just isn't coming to meI'll keep looking. Anyway hope this gets your started. Sri -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Tuesday, November 26, 2002 4:48 PM To: [EMAIL PROTECTED] Subject: [Nested Tags] Frustration..Should this work? Greetings: All I am trying to do is display a a selected item form a list. - pageList is standard java.util.List of LabelValueBeans set in page scope. - cc is a String pulled out of the form bean and set to page scope. Using the nested tags my first approach was this: nested:iterate name=pageList nested:equal property=value value=%= cc % nested:write property=label/ /nested:equal /nested:iterate But to get it working I am forced to redo it like this: nested:iterate id=it name=pageList type=org...LabelValueBean logic:equal name=it property=value value=%= cc % bean:write name=it property=label/ /logic:equal /nested:iterate Before I report this to bugzilla, I would like it if someone could tell me if I am doing something wrong. The error I get is: 2002-11-26 15:32:23 ApplicationDispatcher[/ar] Servlet.service() for servlet jsp threw exception java.lang.NullPointerException at java.util.Hashtable.put(Hashtable.java:394) at org.apache.jasper.runtime.PageContextImpl.setAttribute(PageContextImpl.java:229
RE: [Nested Tags] Frustration..Should this work?
Thank you for reminding me of that link. I tried ./value and this/value without success. Even though I use the nested:form as the root..for this iterate tag I want to tell it to look to an object in page scope instead of the form bean. That is what I thought the combinations of name and property were all about.From docs: ** The collection to be iterated over must be specified in one of the following ways: As a runtime expression specified as the value of the collection attribute. As a JSP bean specified by the name attribute. As the property, specified by the property, of the JSP bean specified by the name attribute. I understand that the name is not needed by the nested tags (thats why I use them so much :-) ), but the nested docs simply point to the docs for the standard logic tags. The nested:iterate seems to work as expected, but the nested equal and write either do not see the current object exposed by nested:iterate OR the nested:iterate is not exposing the current object. I guess my original question still is: should this code work? nested:define id=collectionCode name=%= WebConstants.COLLECTIONCODE_KEY % property=list/ nested:define id=col property=collectionCode type =java.lang.String/ nested:iterate name=collectionCode nested:equal property=value value=%= col % nested:write property=label/ /nested:equal /nested:iterate Thanks for the help.. Sri Sankaran [EMAIL PROTECTED] on 11/27/2002 09:09:59 AM Please respond to Struts Users Mailing List [EMAIL PROTECTED] To:Struts Users Mailing List [EMAIL PROTECTED] cc: Subject:RE: [Nested Tags] Frustration..Should this work? I suspected a problem to be with the iterate since that's what your stack trace suggests. Also, look at Arron's reply to an earlier post (by you, in fact!) http://marc.theaimsgroup.com/?l=struts-userm=103584892423199w=2. He states that the name attribute is ignored. Given that I don't know how the working version works. I trust by works you mean that you are able to display a collection of label values. Have you tried looking at what's going on at line 121 of NestedIterateTag? Sorry I don't have any answers. Sri -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 27, 2002 9:49 AM To: Struts Users Mailing List Subject: RE: [Nested Tags] Frustration..Should this work? Thanks for the reply: It is inside a nested form but I am getting these values by setting to page scope. The nested iterate has no problem reading the collection. The problem is the equal and write tag *inside* the iterate. They only work if I change them to their non nested versions and explicitly set an id to read by the *inner* tags. ** Summary of code below ** The first define tag grabs a wrapper object from application scope and gets the internal List and sets it to page scope - This works. The second define tag gets a value from the form bean (using a nested form) and set it to page scope. - This works. The nested:iterate tag gets the collectionCode from page scope. - This Works. The nested:equal tag *should* use property =value from each LabelValueBean in the List - This does not work. * This code works nested:define id =collectionCode name=%= WebConstants.COLLECTIONCODE_KEY % property =list/ nested:define id=col property=collectionCode type =java.lang.String/ nested:iterate id=item name=collectionCode type =com.nlg.ar.common.datatransfer.vo.LabelValueBean logic:equal name=item property=value value=%= col % bean:write name=item property=label/ /logic:equal /nested:iterate * This code does NOT work - but I think that it should *** nested:define id=collectionCode name=%= WebConstants.STATICLIST_COLLECTIONCODE_KEY % property=list/ nested:define id=col property=collectionCode type =java.lang.String/ nested:iterate name=collectionCode nested:equal property=value value=%= col % nested:write property=label/ /nested:equal /nested:iterate Sri Sankaran [EMAIL PROTECTED] on 11/27/2002 08:16:06 AM Please respond to Struts Users Mailing List [EMAIL PROTECTED] To:Struts Users Mailing List [EMAIL PROTECTED] cc: Subject:RE: [Nested Tags] Frustration..Should this work? I wonder if this would work nested:root name=pageList nested:iterate property=this/ %-- etc --% /nested:iterate /nested:root Sri -Original Message- From: Sri Sankaran Sent: Wednesday, November 27, 2002 9:13 AM To: Struts Users Mailing List Subject: RE: [Nested Tags] Frustration..Should this work? Is this happening inside a nested:form? If so, I am fairly certain that nested:iterate ignores the value of its name attribute. That would explain why your nested:iterate name=pageList isn't working. Also, you probably recognize the problem with changing it to nested:iterate property=pageList That wont work since pageList isn't
RE: [Nested Tags] Frustration..Should this work?
I don't have an answer to your question, should this code work -- since I've never used the name attribute in any nested tag other than nested:root. Sri -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 27, 2002 11:08 AM To: Struts Users Mailing List Subject: RE: [Nested Tags] Frustration..Should this work? Thank you for reminding me of that link. I tried ./value and this/value without success. Even though I use the nested:form as the root..for this iterate tag I want to tell it to look to an object in page scope instead of the form bean. That is what I thought the combinations of name and property were all about.From docs: ** The collection to be iterated over must be specified in one of the following ways: As a runtime expression specified as the value of the collection attribute. As a JSP bean specified by the name attribute. As the property, specified by the property, of the JSP bean specified by the name attribute. I understand that the name is not needed by the nested tags (thats why I use them so much :-) ), but the nested docs simply point to the docs for the standard logic tags. The nested:iterate seems to work as expected, but the nested equal and write either do not see the current object exposed by nested:iterate OR the nested:iterate is not exposing the current object. I guess my original question still is: should this code work? nested:define id=collectionCode name=%= WebConstants.COLLECTIONCODE_KEY % property=list/ nested:define id=col property=collectionCode type =java.lang.String/ nested:iterate name=collectionCode nested:equal property=value value=%= col % nested:write property=label/ /nested:equal /nested:iterate Thanks for the help.. Sri Sankaran [EMAIL PROTECTED] on 11/27/2002 09:09:59 AM Please respond to Struts Users Mailing List [EMAIL PROTECTED] To:Struts Users Mailing List [EMAIL PROTECTED] cc: Subject:RE: [Nested Tags] Frustration..Should this work? I suspected a problem to be with the iterate since that's what your stack trace suggests. Also, look at Arron's reply to an earlier post (by you, in fact!) http://marc.theaimsgroup.com/?l=struts-userm=103584892423199w=2. He states that the name attribute is ignored. Given that I don't know how the working version works. I trust by works you mean that you are able to display a collection of label values. Have you tried looking at what's going on at line 121 of NestedIterateTag? Sorry I don't have any answers. Sri -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 27, 2002 9:49 AM To: Struts Users Mailing List Subject: RE: [Nested Tags] Frustration..Should this work? Thanks for the reply: It is inside a nested form but I am getting these values by setting to page scope. The nested iterate has no problem reading the collection. The problem is the equal and write tag *inside* the iterate. They only work if I change them to their non nested versions and explicitly set an id to read by the *inner* tags. ** Summary of code below ** The first define tag grabs a wrapper object from application scope and gets the internal List and sets it to page scope - This works. The second define tag gets a value from the form bean (using a nested form) and set it to page scope. - This works. The nested:iterate tag gets the collectionCode from page scope. - This Works. The nested:equal tag *should* use property =value from each LabelValueBean in the List - This does not work. * This code works nested:define id =collectionCode name=%= WebConstants.COLLECTIONCODE_KEY % property =list/ nested:define id=col property=collectionCode type =java.lang.String/ nested:iterate id=item name=collectionCode type =com.nlg.ar.common.datatransfer.vo.LabelValueBean logic:equal name=item property=value value=%= col % bean:write name=item property=label/ /logic:equal /nested:iterate * This code does NOT work - but I think that it should *** nested:define id=collectionCode name=%= WebConstants.STATICLIST_COLLECTIONCODE_KEY % property=list/ nested:define id=col property=collectionCode type =java.lang.String/ nested:iterate name=collectionCode nested:equal property=value value=%= col % nested:write property=label/ /nested:equal /nested:iterate Sri Sankaran [EMAIL PROTECTED] on 11/27/2002 08:16:06 AM Please respond to Struts Users Mailing List [EMAIL PROTECTED] To:Struts Users Mailing List [EMAIL PROTECTED] cc: Subject:RE: [Nested Tags] Frustration..Should this work? I wonder if this would work nested:root name=pageList nested:iterate property=this/ %-- etc --% /nested:iterate /nested:root Sri -Original Message- From: Sri Sankaran Sent: Wednesday, November 27, 2002 9:13 AM To: Struts Users Mailing List Subject: RE
RE: [Nested Tags] Frustration..Should this work?
Thanks again for all the help. I guess I need to take a step back, because we are in active development, I will go with what works, even though I do not fully understand why :-) Sri Sankaran [EMAIL PROTECTED] on 11/27/2002 10:43:44 AM Please respond to Struts Users Mailing List [EMAIL PROTECTED] To:Struts Users Mailing List [EMAIL PROTECTED] cc: Subject:RE: [Nested Tags] Frustration..Should this work? I don't have an answer to your question, should this code work -- since I've never used the name attribute in any nested tag other than nested:root. Sri -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 27, 2002 11:08 AM To: Struts Users Mailing List Subject: RE: [Nested Tags] Frustration..Should this work? Thank you for reminding me of that link. I tried ./value and this/value without success. Even though I use the nested:form as the root..for this iterate tag I want to tell it to look to an object in page scope instead of the form bean. That is what I thought the combinations of name and property were all about.From docs: ** The collection to be iterated over must be specified in one of the following ways: As a runtime expression specified as the value of the collection attribute. As a JSP bean specified by the name attribute. As the property, specified by the property, of the JSP bean specified by the name attribute. I understand that the name is not needed by the nested tags (thats why I use them so much :-) ), but the nested docs simply point to the docs for the standard logic tags. The nested:iterate seems to work as expected, but the nested equal and write either do not see the current object exposed by nested:iterate OR the nested:iterate is not exposing the current object. I guess my original question still is: should this code work? nested:define id=collectionCode name=%= WebConstants.COLLECTIONCODE_KEY % property=list/ nested:define id =col property=collectionCode type =java.lang.String/ nested:iterate name=collectionCode nested:equal property=value value=%= col % nested:write property=label/ /nested:equal /nested:iterate Thanks for the help.. Sri Sankaran [EMAIL PROTECTED] on 11/27/2002 09:09:59 AM Please respond to Struts Users Mailing List [EMAIL PROTECTED] To:Struts Users Mailing List [EMAIL PROTECTED] cc: Subject:RE: [Nested Tags] Frustration..Should this work? I suspected a problem to be with the iterate since that's what your stack trace suggests. Also, look at Arron's reply to an earlier post (by you, in fact!) http://marc.theaimsgroup.com/?l=struts-userm=103584892423199w=2. He states that the name attribute is ignored. Given that I don't know how the working version works. I trust by works you mean that you are able to display a collection of label values. Have you tried looking at what's going on at line 121 of NestedIterateTag? Sorry I don't have any answers. Sri -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Wednesday, November 27, 2002 9:49 AM To: Struts Users Mailing List Subject: RE: [Nested Tags] Frustration..Should this work? Thanks for the reply: It is inside a nested form but I am getting these values by setting to page scope. The nested iterate has no problem reading the collection. The problem is the equal and write tag *inside* the iterate. They only work if I change them to their non nested versions and explicitly set an id to read by the *inner* tags. ** Summary of code below ** The first define tag grabs a wrapper object from application scope and gets the internal List and sets it to page scope - This works. The second define tag gets a value from the form bean (using a nested form) and set it to page scope. - This works. The nested:iterate tag gets the collectionCode from page scope. - This Works. The nested:equal tag *should* use property =value from each LabelValueBean in the List - This does not work. * This code works nested:define id =collectionCode name=%= WebConstants.COLLECTIONCODE_KEY % property =list/ nested:define id=col property=collectionCode type =java.lang.String/ nested:iterate id=item name=collectionCode type =com.nlg.ar.common.datatransfer.vo.LabelValueBean logic:equal name=item property=value value=%= col % bean:write name=item property=label/ /logic:equal /nested:iterate * This code does NOT work - but I think that it should *** nested:define id=collectionCode name=%= WebConstants.STATICLIST_COLLECTIONCODE_KEY % property=list/ nested:define id=col property=collectionCode type =java.lang.String/ nested:iterate name=collectionCode nested:equal property=value value=%= col % nested:write property=label/ /nested:equal /nested:iterate Sri Sankaran [EMAIL PROTECTED] on 11/27/2002 08:16:06 AM Please respond to Struts Users Mailing List
