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Posted to users@wicket.apache.org by Linda van der Pal <lv...@heritageagenturen.nl> on 2009/08/19 16:54:20 UTC
How do I get my DropDownChoice to refresh the list of choices with
Ajax?
I have a page with a dropdown list on it with authors. If I enter a new
book I want my fields to be filled based on the ISBN. This works just
fine. But now I want those fields to be filled with data I collect from
the internet, meaning that it isn't always already in my database, and
therefor the author might not yet be in the list. I have already decided
to save the new author so I can select it in the list, but the list
isn't updated, and I can't figure out how to get it to update.
Here are some pieces of code I think are relevant:
This is how I create the authorfield:
authorField = new MultiSelectFieldSwitchPanel("authors", dataRetriever.fetchAuthors(), new PropertyModel(this, "book.authors"));
dataRetriever.fetchAuthors return a List<Author>
Here's the constructor of MultiSelectFieldSwitchPanel which extends
FormComponentPanel:
public MultiSelectFieldSwitchPanel(final String id, final List<? extends DomainObject> authors, final IModel<List<Author>> model) {
super(id, model);
lmc = new ListMultipleChoice("selectField", new PropertyModel<List<Author>>(this, "selectedObjects"),
authors, new ChoiceRenderer<DomainObject>("name", "id"));
init(lmc);
}
The init method adds a link to swap the lmc for a textfield where new
authors can be entered, which is not really relevant in this case.
I have of course already added authorField to the AjaxRequestTarget in
the behavior that is triggered by updating the ISBN.
Regards,
Linda
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Re: How do I get my DropDownChoice to refresh the list of choices
with Ajax?
Posted by Igor Vaynberg <ig...@gmail.com>.
http://wicketstuff.org/wicket/ajax/choice
-igor
On Wed, Aug 19, 2009 at 7:54 AM, Linda van der
Pal<lv...@heritageagenturen.nl> wrote:
> I have a page with a dropdown list on it with authors. If I enter a new book
> I want my fields to be filled based on the ISBN. This works just fine. But
> now I want those fields to be filled with data I collect from the internet,
> meaning that it isn't always already in my database, and therefor the author
> might not yet be in the list. I have already decided to save the new author
> so I can select it in the list, but the list isn't updated, and I can't
> figure out how to get it to update.
>
> Here are some pieces of code I think are relevant:
>
> This is how I create the authorfield:
>
> authorField = new MultiSelectFieldSwitchPanel("authors",
> dataRetriever.fetchAuthors(), new PropertyModel(this, "book.authors"));
>
>
> dataRetriever.fetchAuthors return a List<Author>
>
> Here's the constructor of MultiSelectFieldSwitchPanel which extends
> FormComponentPanel:
>
> public MultiSelectFieldSwitchPanel(final String id, final List<? extends
> DomainObject> authors, final IModel<List<Author>> model) {
> super(id, model);
> lmc = new ListMultipleChoice("selectField", new
> PropertyModel<List<Author>>(this, "selectedObjects"),
> authors, new ChoiceRenderer<DomainObject>("name", "id"));
> init(lmc);
> }
>
> The init method adds a link to swap the lmc for a textfield where new
> authors can be entered, which is not really relevant in this case.
>
> I have of course already added authorField to the AjaxRequestTarget in the
> behavior that is triggered by updating the ISBN.
>
> Regards,
> Linda
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>
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Re: How do I get my DropDownChoice to refresh the list of choices
with Ajax?
Posted by Linda van der Pal <lv...@heritageagenturen.nl>.
Doh, I should have thought of that myself. That'll teach me to send a
question at the end of the day. Thanks for taking the time to answer my
question, Bas and Igor.
Regards,
Linda
Bas Gooren wrote:
> Linda,
>
> Without looking at your question very long I noticed that you supply
> your component with a static List<Author>.
>
> This means that this list is only retrieved once (at initialization).
> It sounds like you want it to be refreshed when other components
> change their input. This would mean you need to supply a Model which
> returns a List<Author>; That way when you re-render the component
> through AJAX, it reloads the list of authors.
>
> Regards,
>
> Bas
>
> ----- Original Message ----- From: "Linda van der Pal"
> <lv...@heritageagenturen.nl>
> To: <us...@wicket.apache.org>
> Sent: Wednesday, August 19, 2009 4:54 PM
> Subject: How do I get my DropDownChoice to refresh the list of choices
> with Ajax?
>
>
>> I have a page with a dropdown list on it with authors. If I enter a
>> new book I want my fields to be filled based on the ISBN. This works
>> just fine. But now I want those fields to be filled with data I
>> collect from the internet, meaning that it isn't always already in my
>> database, and therefor the author might not yet be in the list. I
>> have already decided to save the new author so I can select it in the
>> list, but the list isn't updated, and I can't figure out how to get
>> it to update.
>>
>> Here are some pieces of code I think are relevant:
>>
>> This is how I create the authorfield:
>>
>> authorField = new MultiSelectFieldSwitchPanel("authors",
>> dataRetriever.fetchAuthors(), new PropertyModel(this, "book.authors"));
>>
>>
>> dataRetriever.fetchAuthors return a List<Author>
>>
>> Here's the constructor of MultiSelectFieldSwitchPanel which extends
>> FormComponentPanel:
>>
>> public MultiSelectFieldSwitchPanel(final String id, final List<?
>> extends DomainObject> authors, final IModel<List<Author>> model) {
>> super(id, model);
>> lmc = new ListMultipleChoice("selectField", new
>> PropertyModel<List<Author>>(this, "selectedObjects"), authors, new
>> ChoiceRenderer<DomainObject>("name", "id"));
>> init(lmc);
>> }
>>
>> The init method adds a link to swap the lmc for a textfield where new
>> authors can be entered, which is not really relevant in this case.
>>
>> I have of course already added authorField to the AjaxRequestTarget
>> in the behavior that is triggered by updating the ISBN.
>>
>> Regards,
>> Linda
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
>> For additional commands, e-mail: users-help@wicket.apache.org
>>
>>
>
>
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Re: How do I get my DropDownChoice to refresh the list of choices with Ajax?
Posted by Bas Gooren <ba...@iswd.nl>.
Linda,
Without looking at your question very long I noticed that you supply your
component with a static List<Author>.
This means that this list is only retrieved once (at initialization). It
sounds like you want it to be refreshed when other components change their
input. This would mean you need to supply a Model which returns a
List<Author>; That way when you re-render the component through AJAX, it
reloads the list of authors.
Regards,
Bas
----- Original Message -----
From: "Linda van der Pal" <lv...@heritageagenturen.nl>
To: <us...@wicket.apache.org>
Sent: Wednesday, August 19, 2009 4:54 PM
Subject: How do I get my DropDownChoice to refresh the list of choices with
Ajax?
>I have a page with a dropdown list on it with authors. If I enter a new
>book I want my fields to be filled based on the ISBN. This works just fine.
>But now I want those fields to be filled with data I collect from the
>internet, meaning that it isn't always already in my database, and therefor
>the author might not yet be in the list. I have already decided to save the
>new author so I can select it in the list, but the list isn't updated, and
>I can't figure out how to get it to update.
>
> Here are some pieces of code I think are relevant:
>
> This is how I create the authorfield:
>
> authorField = new MultiSelectFieldSwitchPanel("authors",
> dataRetriever.fetchAuthors(), new PropertyModel(this, "book.authors"));
>
>
> dataRetriever.fetchAuthors return a List<Author>
>
> Here's the constructor of MultiSelectFieldSwitchPanel which extends
> FormComponentPanel:
>
> public MultiSelectFieldSwitchPanel(final String id, final List<? extends
> DomainObject> authors, final IModel<List<Author>> model) {
> super(id, model);
> lmc = new ListMultipleChoice("selectField", new
> PropertyModel<List<Author>>(this, "selectedObjects"), authors, new
> ChoiceRenderer<DomainObject>("name", "id"));
> init(lmc);
> }
>
> The init method adds a link to swap the lmc for a textfield where new
> authors can be entered, which is not really relevant in this case.
>
> I have of course already added authorField to the AjaxRequestTarget in the
> behavior that is triggered by updating the ISBN.
>
> Regards,
> Linda
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>
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