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Posted to user@struts.apache.org by Eric Chow <er...@gmail.com> on 2005/01/28 11:43:08 UTC
Create dynamic form ?
For use DynaForm, I have to define it in struts-config.xml, right ?
How can I create forms without defining it in the struts-config.xml?
I mean I want o use my own config and generate a HTML form with Struts
action handling.
Is it possible to implement this with Struts ??
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Re: Create dynamic form ?
Posted by Joe Germuska <Jo...@Germuska.com>.
At 5:29 PM +0800 1/29/05, Eric Chow wrote:
>How can I not use the struts-config.xml but I can use my own config to
>generate a HTML form and use a standard validator to validate the form
>data ??
When Struts goes to get you a form bean (based on the "name"
attribute of an <action> mapping, it goes to the current ModuleConfig
object and calls "findFormBeanConfig(String name)".
You can call "addFormBeanConfig" on a ModuleConfig object any time
before the Servlet init process is done; probably the best place to
do this is in a PlugIn class, whose init method gets handed the
ModuleConfig. In the example I cited, we looked up "form"
information from a database schema representing a survey, and created
FormBeanConfig objects based on that data, and added them to the
Module's set of available forms. If I recall, the PlugIn was
designed to take as config properties the unique ID of the survey
config database record and a form bean name; if we had needed more
than one per app, I probably would have just set up a series of
PlugIns, each with the responsibility of instantiating one
FormBeanConfig.
This is not extremely complicated, but at this point if you still
have questions, I'd suggest getting a copy of the Struts source code
and tracing this through. (In general, I'd suggest this for anyone
with the slightest curiosity. It's really not so complicated, and it
will give you a much broader idea about how you can make Struts do
what you want it to do.)
Joe
>
>On Fri, 28 Jan 2005 10:12:32 -0600, Joe Germuska <Jo...@germuska.com> wrote:
>> At 8:03 AM -0700 1/28/05, Wendy Smoak wrote:
>> >From: "Eric Chow" <er...@gmail.com>
>> >
>> >>How can I create forms without defining it in the struts-config.xml?
>> >>I mean I want o use my own config and generate a HTML form with Struts
>> >>action handling.
>> >
>> >Take a look at LazyDynaBean and LazyValidatorForm. There's some
>> >information on the wiki:
>> >http://wiki.apache.org/struts/StrutsCatalogLazyList section 2.4 .
>>
>> A developer on my team developed a system to retrieve survey
>> configuration data from a database and present it to users in Struts.
>> This involved dynamic form creation and validation. The gist was
>> that a PlugIn, when initialized, used database data to create and
>> register DynaForms. I believe it was a subclass of
>> DynaActionValidatorForm which could interact with this same PlugIn to
>> do the Survey specific validation (where the rules came from the
>> database) while delegating validation for any standard fields (like
>> contact info) to normally configured validator XML.
>>
>> As Wendy points out, now that there are LazyValidatorForms, this
>> would probably be simpler, because you would only need to extend the
>> validation method, and could probably skip defining new form classes.
>>
>> Joe
>>
>> --
>> Joe Germuska
>> Joe@Germuska.com
>> http://blog.germuska.com
>> "Narrow minds are weapons made for mass destruction" -The Ex
>>
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>> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
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>>
>>
>
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--
Joe Germuska
Joe@Germuska.com
http://blog.germuska.com
"Narrow minds are weapons made for mass destruction" -The Ex
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Re: Create dynamic form ?
Posted by Eric Chow <er...@gmail.com>.
How can I not use the struts-config.xml but I can use my own config to
generate a HTML form and use a standard validator to validate the form
data ??
On Fri, 28 Jan 2005 10:12:32 -0600, Joe Germuska <Jo...@germuska.com> wrote:
> At 8:03 AM -0700 1/28/05, Wendy Smoak wrote:
> >From: "Eric Chow" <er...@gmail.com>
> >
> >>How can I create forms without defining it in the struts-config.xml?
> >>I mean I want o use my own config and generate a HTML form with Struts
> >>action handling.
> >
> >Take a look at LazyDynaBean and LazyValidatorForm. There's some
> >information on the wiki:
> >http://wiki.apache.org/struts/StrutsCatalogLazyList section 2.4 .
>
> A developer on my team developed a system to retrieve survey
> configuration data from a database and present it to users in Struts.
> This involved dynamic form creation and validation. The gist was
> that a PlugIn, when initialized, used database data to create and
> register DynaForms. I believe it was a subclass of
> DynaActionValidatorForm which could interact with this same PlugIn to
> do the Survey specific validation (where the rules came from the
> database) while delegating validation for any standard fields (like
> contact info) to normally configured validator XML.
>
> As Wendy points out, now that there are LazyValidatorForms, this
> would probably be simpler, because you would only need to extend the
> validation method, and could probably skip defining new form classes.
>
> Joe
>
> --
> Joe Germuska
> Joe@Germuska.com
> http://blog.germuska.com
> "Narrow minds are weapons made for mass destruction" -The Ex
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
>
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Re: Create dynamic form ?
Posted by Joe Germuska <Jo...@Germuska.com>.
At 8:03 AM -0700 1/28/05, Wendy Smoak wrote:
>From: "Eric Chow" <er...@gmail.com>
>
>>How can I create forms without defining it in the struts-config.xml?
>>I mean I want o use my own config and generate a HTML form with Struts
>>action handling.
>
>Take a look at LazyDynaBean and LazyValidatorForm. There's some
>information on the wiki:
>http://wiki.apache.org/struts/StrutsCatalogLazyList section 2.4 .
A developer on my team developed a system to retrieve survey
configuration data from a database and present it to users in Struts.
This involved dynamic form creation and validation. The gist was
that a PlugIn, when initialized, used database data to create and
register DynaForms. I believe it was a subclass of
DynaActionValidatorForm which could interact with this same PlugIn to
do the Survey specific validation (where the rules came from the
database) while delegating validation for any standard fields (like
contact info) to normally configured validator XML.
As Wendy points out, now that there are LazyValidatorForms, this
would probably be simpler, because you would only need to extend the
validation method, and could probably skip defining new form classes.
Joe
--
Joe Germuska
Joe@Germuska.com
http://blog.germuska.com
"Narrow minds are weapons made for mass destruction" -The Ex
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Re: Create dynamic form ?
Posted by Wendy Smoak <ja...@wendysmoak.com>.
From: "Eric Chow" <er...@gmail.com>
> How can I create forms without defining it in the struts-config.xml?
> I mean I want o use my own config and generate a HTML form with Struts
> action handling.
Take a look at LazyDynaBean and LazyValidatorForm. There's some information
on the wiki:
http://wiki.apache.org/struts/StrutsCatalogLazyList section 2.4 .
--
Wendy Smoak
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