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Posted to users@wicket.apache.org by Dreamage <gr...@hotmail.com> on 2008/10/27 02:04:02 UTC
Ajax form components principles
Hi,
Suppose I have a form with an ajax checkbox inside it. Whenever I
check/uncheck the checkbox, the associated model is updated. The problem is
that if the the checkbox uses a propertymodel targetting a object from my
database (using a datachable model to retrieve it), then the object is
modified in the database and I haven't submit the form yet. If the form have
a cancel button, my object could still be modified if I used the checkbox
before using cancel.
I read somewhere that ajax components should not modify the object until
form post (can't remember where), so should I use a temporary model as the
ajax checkbox model and apply the value to my database object when the form
is submitted ? If yes, where should I place this code or is there a better
way to do this ?
Thanks
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Re: Ajax form components principles
Posted by Dreamage <gr...@hotmail.com>.
Because I want to trigger a show/hide for a textfield when the checkbox is
checked/unchecked.
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Re: Ajax form components principles
Posted by Dreamage <gr...@hotmail.com>.
Thanks jwcarman, thats a very good track. I'll look into it.
jwcarman wrote:
>
> You can use wicketopia's ProxyModelManager, if you want:
>
> https://wicketopia.svn.sourceforge.net/svnroot/wicketopia/trunk/wicketopia/src/main/java/org/wicketopia/model/proxy/ProxyModelManager.java
>
> This way, you bind your components to proxied models. When you're
> ready to really write the values into the real models, you can call
> commit() on the manager and it'll take care of pushing the values from
> the proxied models into the actual models.
>
>
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Re: Ajax form components principles
Posted by James Carman <ja...@carmanconsulting.com>.
You can use wicketopia's ProxyModelManager, if you want:
https://wicketopia.svn.sourceforge.net/svnroot/wicketopia/trunk/wicketopia/src/main/java/org/wicketopia/model/proxy/ProxyModelManager.java
This way, you bind your components to proxied models. When you're
ready to really write the values into the real models, you can call
commit() on the manager and it'll take care of pushing the values from
the proxied models into the actual models.
On Mon, Oct 27, 2008 at 7:14 PM, Dreamage <gr...@hotmail.com> wrote:
>
> Anyway the point is that when using ajax components, the associated model is
> updated but the form may not be submitted yet, so how would you implement a
> cancel button to undo the ajax model updates ? Do we have to do all this by
> hand (storing ajax model updates in temporary variables and applying the
> values to the real models in the onSubmit method of the form) or is there
> another way ?
>
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> View this message in context: http://www.nabble.com/Ajax-form-components-principles-tp20180246p20198434.html
> Sent from the Wicket - User mailing list archive at Nabble.com.
>
>
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Re: Ajax form components principles
Posted by Igor Vaynberg <ig...@gmail.com>.
you are using ajaxformcomponentupdatingbehavior which is made
specifically for updating components. nothing is stopping you from
using ajaxeventbehavior to bypass default form processing and do
whatever you want however you want.
what we offer here are the defaults, they do not use any special api
that you do not have access to. if the default doesnt work how you
want then roll your own.
you might think that the default is backwards, but consider this: you
are the first person to think its backwards in well over a couple of
years that wicket had ajax support.
-igor
On Mon, Oct 27, 2008 at 4:14 PM, Dreamage <gr...@hotmail.com> wrote:
>
> Anyway the point is that when using ajax components, the associated model is
> updated but the form may not be submitted yet, so how would you implement a
> cancel button to undo the ajax model updates ? Do we have to do all this by
> hand (storing ajax model updates in temporary variables and applying the
> values to the real models in the onSubmit method of the form) or is there
> another way ?
>
> --
> View this message in context: http://www.nabble.com/Ajax-form-components-principles-tp20180246p20198434.html
> Sent from the Wicket - User mailing list archive at Nabble.com.
>
>
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> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
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Re: Ajax form components principles
Posted by Dreamage <gr...@hotmail.com>.
Anyway the point is that when using ajax components, the associated model is
updated but the form may not be submitted yet, so how would you implement a
cancel button to undo the ajax model updates ? Do we have to do all this by
hand (storing ajax model updates in temporary variables and applying the
values to the real models in the onSubmit method of the form) or is there
another way ?
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Re: Ajax form components principles
Posted by Igor Vaynberg <ig...@gmail.com>.
if you dont want the model updated why are you using a
ajaxformcomponentupdatingbehavior?
-igor
On Sun, Oct 26, 2008 at 6:04 PM, Dreamage <gr...@hotmail.com> wrote:
>
> Hi,
>
> Suppose I have a form with an ajax checkbox inside it. Whenever I
> check/uncheck the checkbox, the associated model is updated. The problem is
> that if the the checkbox uses a propertymodel targetting a object from my
> database (using a datachable model to retrieve it), then the object is
> modified in the database and I haven't submit the form yet. If the form have
> a cancel button, my object could still be modified if I used the checkbox
> before using cancel.
>
> I read somewhere that ajax components should not modify the object until
> form post (can't remember where), so should I use a temporary model as the
> ajax checkbox model and apply the value to my database object when the form
> is submitted ? If yes, where should I place this code or is there a better
> way to do this ?
>
> Thanks
> --
> View this message in context: http://www.nabble.com/Ajax-form-components-principles-tp20180246p20180246.html
> Sent from the Wicket - User mailing list archive at Nabble.com.
>
>
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> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>
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