I haven't really used the DataModel class yet, but as described by
Brendan in another thread, I have a couple of questions about the
concepts behind it...
First a simple example...
Want to display on a page a list of employees. User should be able to
click on employee and brought to an edit page
:[EMAIL PROTECTED] Sent: Monday, August 29, 2005 9:22
AMTo: MyFaces DiscussionSubject: Concerning DataModel
usage plus overhead?I haven't really used the DataModel
class yet, but as described by Brendan in another thread, I have a couple of
questions about the concepts behind it...Fi
MAIL PROTECTED]
*Sent:* Monday, August 29, 2005 9:22 AM
*To:* MyFaces Discussion
*Subject:* Concerning DataModel usage plus overhead?
I haven't really used the DataModel class yet, but as described by
Brendan in another thread, I have a couple of questions about the
conc
On 8/29/05, Kevin Galligan <[EMAIL PROTECTED]> wrote:
If you use the standard dataTable, you have tokeep your values in session between the time you show the list and whenthey click on the value. If you get the values from the db each time,you open the possibility that the index will have changed
scussionSubject: Re: Concerning
DataModel usage plus overhead?On 8/29/05, Kevin Galligan <[EMAIL PROTECTED]>
wrote:
If
you use the standard dataTable, you have tokeep your values in session
between the time you show the list and whenthey click on the
value. If you ge
On 8/29/05, CONNER, BRENDAN (SBCSI) <[EMAIL PROTECTED]> wrote:
Yes,
you could do your own parameter passing. It's just that JSF offers the
DataModel abstraction such that, when the user clicks on your link,
your program just has to ask DataModel for rowIndex to locate the row that
was s
, August 29, 2005 2:33
PMTo: MyFaces DiscussionSubject: Re: Concerning
DataModel usage plus overhead?On 8/29/05, CONNER, BRENDAN (SBCSI) <[EMAIL PROTECTED]> wrote:
Yes, you could do your own
parameter passing. It's just that JSF offers the DataModel abstraction
*From:* Rick Reumann [mailto:[EMAIL PROTECTED]
*Sent:* Monday, August 29, 2005 2:09 PM
*To:* MyFaces Discussion
*Subject:* Re: Concerning DataModel usage plus overhead?
On 8/29/05, *Kevin Galligan* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
If yo
On 8/29/05, CONNER, BRENDAN (SBCSI) <[EMAIL PROTECTED]> wrote:
You
set up employee to have a managed reference to employees. Then, once
control reaches Employee.edit(), its reference to employees will have been
set up already by JSF.
But employee has its managed bean reference to "emplo
: users@myfaces.apache.org
Subject: Re: Concerning DataModel usage plus overhead?
I tried to send this, and I think it failed. Anyway...
Rick, "To me the above is just really goofy. Unless, there are security
constraints to me it makes sense to get the item you want back based on
some key.&
: Concerning
DataModel usage plus overhead?On 8/29/05, CONNER, BRENDAN (SBCSI) <[EMAIL PROTECTED]> wrote:
You set up employee to have
a managed reference to employees. Then, once control reaches
Employee.edit(), its reference to employees will have been set up
already
inal Message-
From: Kevin Galligan [mailto:[EMAIL PROTECTED]
Sent: Monday, August 29, 2005 2:50 PM
To: users@myfaces.apache.org
Subject: Re: Concerning DataModel usage plus overhead?
I tried to send this, and I think it failed. Anyway...
Rick, "To me the above is just really goofy
On 8/29/05, CONNER, BRENDAN (SBCSI) <[EMAIL PROTECTED]> wrote:
>
> I probably just got confused by your naming convention. Can you repeat your
> question with clearer names?
Sure. Let me change the names and concepts..
First page you come to is a list of cars on "cars.jsp". Cars is
populated
ay, August 29, 2005 3:23 PM
To: MyFaces Discussion
Subject: Re: Concerning DataModel usage plus overhead?
Hmm. I could, but I'd bet it would be no different. I don't think that
takes care of the fundamental problem, which is as follows...
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Subject: Re: Concerning DataModel usage plus overhead?
On 8/29/05, CONNER, BRENDAN (SBCSI) <[EMAIL PROTECTED]> wrote:
>
> I probably just got confused by your naming convention. Can you
repeat your
> question with clearer names?
Sure. Let me change the names and concepts..
AIL PROTECTED]
Sent: Monday, August 29, 2005 3:23 PM
To: MyFaces Discussion
Subject: Re: Concerning DataModel usage plus overhead?
Hmm. I could, but I'd bet it would be no different. I don't think that
takes care of the fundamental problem, which is as follows...
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ailto:[EMAIL PROTECTED]
> Sent: Monday, August 29, 2005 3:24 PM
> To: MyFaces Discussion
> Subject: Re: Concerning DataModel usage plus overhead?
>
>
> On 8/29/05, CONNER, BRENDAN (SBCSI) <[EMAIL PROTECTED]> wrote:
> >
> > I probably just got confused by your n
al Message-
From: Rick Reumann [mailto:[EMAIL PROTECTED]
Sent: Monday, August 29, 2005 4:02 PM
To: MyFaces Discussion
Subject: Re: Concerning DataModel usage plus overhead?
Actually, the MyFaces master/detail example source code is shedding
some light on some things. Rather than me waste more o
Note that I've defined the beans to be request scope, with the
expectation that your JSP will have
- Brendan
-Original Message-
From: CONNER, BRENDAN (SBCSI)
Sent: Monday, August 29, 2005 4:21 PM
To: 'MyFaces Discussion'
Subject: RE: Concerning DataModel usage plus ove
well as
the detail, you'd query the database for that as well.
I guess I'd have to have more information to see where the stumbling
block is. Maybe I'm not having any issues with it because I'm using
.
- Brendan
-Original Message-
From: Kevin Galligan [mailto:[EMAIL
o end of frustration.
- Brendan
-Original Message-
From: Kevin Galligan [mailto:[EMAIL PROTECTED]
Sent: Monday, August 29, 2005 4:25 PM
To: MyFaces Discussion
Subject: Re: Concerning DataModel usage plus overhead?
There's no stumbling block. I'm saying that if you'r
AIL PROTECTED]
*Sent:* Monday, August 29, 2005 2:09 PM
*To:* MyFaces Discussion
*Subject:* Re: Concerning DataModel usage plus overhead?
On 8/29/05, *Kevin Galligan* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
If you use the standard dataTable,
method, you'd have something like:
>
> public String getCar() {
> Car selectedCar = (Car)
> getCarListBean().getCarModel().getRowData();
> ...
> }
>
> Hope that helps.
>
> - Brendan
>
> -----Original Message-
> From: Rick Reumann [m
-Original Message-
From: Rick Reumann [mailto:[EMAIL PROTECTED]
Sent: Monday, August 29, 2005 7:43 PM
To: MyFaces Discussion
Subject: Re: Concerning DataModel usage plus overhead?
Thanks Brendan! This below looks wonderful. At home now and no time to
try it, but will tomorrow from work
return reportsModel;
}
In case anyone else is trying out the O'Reilly example, that bug can
cause no end of frustration.
- Brendan
-Original Message-
From: Kevin Galligan [mailto:[EMAIL PROTECTED]
Sent: Monday, August 29, 2005 4:25 PM
To: MyFaces Discussion
Subject: Re: Concer
lication (that
we've found, anyway!). I just wrote a note in my book so I don't repeat
that error.
- Brendan
-Original Message-
From: Kevin Galligan [mailto:[EMAIL PROTECTED]
Sent: Tuesday, August 30, 2005 11:41 AM
To: MyFaces Discussion
Subject: Re: Concerning DataModel usage p
cation (that
> we've found, anyway!). I just wrote a note in my book so I don't repeat
> that error.
>
> - Brendan
>
> -Original Message-
> From: Kevin Galligan [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, August 30, 2005 11:41 AM
> To: MyFaces Discussion
> Subjec
reportsModel = new ListDataModel();
}
reportsModel.setWrappedData(getReports()); // wrong
return reportsModel;
}
In case anyone in the discussion group is using this example, please
note that the above should be changed to:
public DataModel getReportsModel() {
if (reportsModel
On 8/30/05, Martin Marinschek <[EMAIL PROTECTED]> wrote:
> With this, the dataModel of the list is serialized to the client (in
> the component state) and will be used for all phases on the postback
> until rendering response comes into place - then the new data-model
> will be fetched from the d
Yeah, this is what I was going on about in my post. Lots of hoops on
the front end to do something that seems conceptually simple.
I think updating several rows at the same time, which might require
local copies of the data, and just linking are two different things.
They might need two diffe
On 8/30/05, Kevin Galligan <[EMAIL PROTECTED]> wrote:
> I think updating several rows at the same time, which might require
> local copies of the data, and just linking are two different things.
> They might need two different components.
With Struts this was a piece of cake. Your ActionForm has
My brain is very struts centric as well. There's some things I like
about the JSF model too though. Thats why I'm probably landing
somewhere in between.
I generally avoided session scoping anything that didn't need to be,
which I guess is my big reservation with JSF. I know exactly what you
Kevin,
I am trying to get Sylvain involved in this to explain
forceIndexFormula better (hint: this should be in the documentation ;)
- but I believe that his solution is somewhat similar to your
suggestion!
Particularly, you just get the id of the data row as part of the
client-id in your action,
Hello,
I'm not sure I understand your problem, but I'll try to explain what I can :
If your problem is that in fields in a table, only the first field is updated, then this has nothing to do with forceIndexFormula, and it might very well be a bug. I had a similar problem, but I didn't take th
I'll take another look. I thought I understood how it worked, and it
did funtion just adding that value, so I'm not sure its exactly the same
as I've suggested.
I did try to look at the code, but to be honest it was late, and my
brain wasn't getting around it. I'll have to try that again. P
The problem was really a question of implementation. We were talking
basically about linking in JSF applications to lists from a database.
The problem with the standard datatable is as follows:
1) Keep your list in the session. This makes sure that when the user
clicks the link that they are
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