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Re: [Springframework-developer] Assigning fixed value from a hidden form element
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From: Rob H. <ro...@in...> - 2006-07-28 21:34:00
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I can always add the ability to use the form tags for this if you'd
like :)
I just think the plain HTML works pretty nicely here as well.
Rob
On 26 Jul 2006, at 03:58, Thomas Risberg wrote:
> Colin,
>
> Right, once I actually started thinking about what was happening
> behind the scenes it became obvious that my first approach was
> broken. I have used the ${status.expression} in the past but after
> using the new <form> tags I got spoiled by just specifying the
> path. I like really like the new tags, they are much cleaner in my
> opinion. For my use for a hidden field with a static value there
> is no need to use a tag library as long as I match the name to the
> property.
>
> Thanks,
> Thomas
>
>
>
> On Jul 25, 2006, at 4:39 PM, Colin Yates wrote:
>
>> The spring bind tags are only ever used when rendering the view,
>> not when submitting the data. Basically the spring bind tags just
>> result in HTML which is what the browser resubmits.
>>
>> That being said, if you are using the spring:bind tag then there
>> is a very useful status object which you can use to get the
>> correct name and value:
>>
>> <spring:bind path="command.step">
>> <input type="hidden" name="${status.expression}" value="$
>> {status.value}"/>
>> </spring:bind>
>>
>>
>> On 25/07/06, tho...@tr... <tho...@tr...>
>> wrote:
>> Brendan,
>>
>> Thanks for your help - I think I figured it out.
>>
>> If you look at my original example I had
>>
>> <spring:bind path="command.step">
>> <input type="hidden" name="_step" value="STEP1"/>
>> </spring:bind>
>>
>> The name="_step" did not match the property name so it did not get
>> bound
>> even though the path explicitly names the property. It seemed to
>> me that
>> the path should rule here, but maybe that's not how it's supposed
>> to work.
>>
>> Once I changed it to
>>
>> <spring:bind path="command.step">
>> <input type="hidden" name="step" value="STEP1"/>
>> </spring:bind>
>>
>> it works fine and so does
>>
>> <input type="hidden" name="step" value="STEP1" />
>>
>> They both get bound properly.
>>
>> Thanks,
>> Thomas
>>
>>
>> > Thomas,
>> >
>> > Can you please try this and let us know what the result is:
>> >
>> > <input type="hidden" name="step" value="STEP1" />
>> >
>> > We do this sort of thing all over the place and it works fine. I'm
>> > assuming
>> > here that step is a property on your command object of course.
>> >
>> > Also, you did import the spring tags right? (Just asking as
>> that's the
>> > sort
>> > of thing I forget to do all the time ;-)
>> >
>> > Thanks
>> > Brendan
>> >
>> > On 7/25/06, Matt Sgarlata < mat...@sp...>
>> wrote:
>> >>
>> >> I think you can also do
>> >>
>> >> <input type="hidden" name="command.step " value="<c:out
>> >> value='${command.step}'/>"/>
>> >>
>> >> tho...@tr... wrote:
>> >> > Brendan,
>> >> >
>> >> > That's what I thought too, but the command.step property ends
>> up being
>> >> > null when accessed from the validation code.
>> >> >
>> >> > Thomas
>> >> >
>> >> >> Hi Thomas,
>> >> >>
>> >> >> I don't see why:
>> >> >>
>> >> >> <spring:bind path="command.step">
>> >> >> <input type="hidden" name="${ status.expression}"
>> value="STEP1"/>
>> >> >> </spring:bind>
>> >> >>
>> >> >> wouldn't work or am I misunderstanding your question?
>> >> >>
>> >> >> Brendan
>> >> >>
>> >> >> On 7/25/06, tho...@tr... <tho...@tr...>
>> >> wrote:
>> >> >>> Is there a convenient way to assign a fixed value from a
>> hidden form
>> >> >>> element and have it bound to the command object? I'm using
>> the new
>> >> >>> <form>
>> >> >>> tags.
>> >> >>>
>> >> >>> the <form:hidden> tag does not have a value attribute.
>> >> >>>
>> >> >>> Tried to mix in a <spring:bind> tag but this resulted in the
>> >> preperty
>> >> >>> being set to null on the command object even though it
>> originally
>> >> had
>> >> a
>> >> >>> value pre-assigned when the command object was created.
>> >> >>>
>> >> >>> Can we mix and match <form:> and <spring:bind> tags?
>> >> >>>
>> >> >>> Here is a simplified version of what I'm using:
>> >> >>>
>> >> >>> <h4>New Login Account</h4>
>> >> >>>
>> >> >>> <form:form commandName="command" action="new_user.htm">
>> >> >>> <table>
>> >> >>> <tr>
>> >> >>> <td class="prompt">Login ID:</td><td class="value">
>> >> >>> <form:input path=" user.userName"/>
>> >> >>> </td>
>> >> >>> </tr>
>> >> >>> <tr class="even">
>> >> >>> <td class="prompt">Password:</td><td class="value">
>> >> >>> <form:password path="user.password"/>
>> >> >>> </td>
>> >> >>> <td>Retype Password:</td><td class="value">
>> >> >>> <form:password path="user.retypePassword"/>
>> >> >>> </td>
>> >> >>> </tr>
>> >> >>> </table>
>> >> >>>
>> >> >>> <table>
>> >> >>> <tr>
>> >> >>> <td class="submit"><input name="_eventId_submit"
>> >> type="submit"
>> >> >>> value="NEXT"/></td>
>> >> >>> </tr>
>> >> >>> </table>
>> >> >>>
>> >> >>> <spring:bind path=" command.step">
>> >> >>> <input type="hidden" name="_step" value="STEP1"/>
>> >> >>> </spring:bind>
>> >> >>> <input type="hidden" name="_flowExecutionKey"
>> >> >>> value="${flowExecutionKey}"/>
>> >> >>>
>> >> >>> </form:form>
>> >> >>>
>> >> >>> The "command.step" is the property that I want to be able
>> to set to
>> >> a
>> >> >>> fixed value from the form, like STEP1 in the example.
>> >> >>>
>> >> >>> Thomas
>> >> >>>
>> >> >>>
>> >> >>>
>> >>
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--
Rob Harrop
VP, Technology Strategy
Interface21 - Spring Services from the Source
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