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Re: [flask] Flask-WTF multiple form per view

From:

Dan Jacob

Date:

2010-09-12 @ 12:33

The problem there is how do you know which form is being submitted ?
Beyond checking the HTTP METHOD you can't really know.

You are free of course to override is_submitted() for your own form
classes though to implement specific logic, for example checking for a
specific field.

On 12 September 2010 13:31, Anton Khodakivskiy <akhodakivskiy@gmail.com> wrote:
> Thanks for the quick response.
>
> Maybe some logic should be added the the is_submitted() method on the 
Form class? Right now it just checks that the method is POST/PUT, but it 
does not check that this particular form has been submitted.
>
> Anton
>
> On Sep 12, 2010, at 3:09 PM, Dan Jacob wrote:
>
>> What you can do is use the prefix argument for forms.
>>
>> Example:
>>
>> form1 = FormA(prefix="form1")
>> form2 = FormB(prefix="form2")
>> form3 = FormC(prefix="form3")
>>
>> Then, add a hidden field (or just check a submit field):
>>
>> if form1.validate_on_submit() and form1.submit.data:
>> ....
>>
>> The prefix arg will ensure that each form has unique field names - so
>> form1's submit will be called "form1_submit".
>>
>> On 12 September 2010 13:03, Anton Khodakivskiy <akhodakivskiy@gmail.com> wrote:
>>> Hi
>>>
>>> I'm trying to put in several forms in a single view function. Is it 
possible to find out which form has been submitted, and skip validation 
and processing for all other forms? This code below validates all three 
forms, so I'm getting validation messages on every form.
>>>
>>> I dont mind to add separate view functions to process the form POSTs 
separately, but the forms still need to be displayed on a single page, 
preferably with the validation messages (the POST handlers need to pass 
the validation data to the function that presents the forms).
>>>
>>> Note that I do the redirect on successful validation to make sure the 
user wont resubmit the form. I also would like to do the redirects when 
the validation fails, but I want to keep the user input and the validation
messages. Is it possible to save this data across requests without much 
pain?
>>>
>>> form1 = FromOne()
>>> if form1.validate_on_submit():
>>>    ...
>>>    return(flask.redirect(...
>>>
>>> form2 = FromTwo()
>>> if form2.validate_on_submit():
>>>    ...
>>>    return(flask.redirect(...
>>>
>>> form3 = FromThree()
>>> if form3.validate_on_submit():
>>>    ...
>>>    return(flask.redirect(...
>>>
>>> return flask.render_template('template.html', **{
>>>    'form1': form1,
>>>    'form2': form2,
>>>    'form3': form3,
>>> } )
>>>
>>>
>>> Thanks
>>> Anton
>>>
>
>