Well, I have a solution to my issue but I have a feeling its more of a
hack. Let me explain, but bear with me because I'm typing/coding with one
arm as I broke my wrist last weekend and am in a cast. It's a painfully
slow experience.
*Problem*: Be able to run extra validation on a Page's Form via a Page
Processor (created by adding a new Page with a Form as the content model in
Mezzanine's admin)
*Solution*:
- Run any extra validation necessary in the page processor
- Reassign request.POST after removing whatever keys from the POST data
which didn't validate
- Manually add form field errors and return the form
I'm getting married and am creating a website with an RSVP page. I added a
form field to the page where the user is expected to enter the bride or
groom's last name to prevent spam. That context will hopefully shed some
light on the code below.
@processor_for('rsvp')
def rsvp_form(request, page):
if request.POST:
# get the right field for secret question from the form model
secret_field = page.form.fields.filter(label="What is Jen or
Danny's last name?")
if secret_field.exists():
secret_field = secret_field[0]
secret_field_post_key = 'field_%s' % secret_field.id
secret_value = request.POST.get(secret_field_post_key)
# answer should be one of our last names
prog = re.compile('sanchez|flack', re.I)
if request.POST.get(secret_field_post_key) and not
prog.match(secret_value):
# wrong answer to the secret question so invalidate form by
removing the secret value
# from the post data and reassigning the data back to the
request object's POST
form_data = request.POST.copy()
del form_data[secret_field_post_key]
request.POST = form_data
# add the error to the form
form = FormForForm(page.form, RequestContext(request),
form_data, None)
form_error = {
secret_field_post_key: form.error_class(['Are you sure
you know these folks?'])
}
if form.errors:
form._errors.update(form_error)
else:
form._errors = form_error
return {'form': form}
else:
raise forms.ValidationError('Missing expected secret field')
return {}
On Tue, Mar 4, 2014 at 10:41 AM, Josh Cartmell <[email protected]> wrote:
> So I'm not actually sure about adding extra validation to the Form content
> type. I would start by looking at the default form page processor,
> https://bitbucket.org/stephenmcd/mezzanine/src/ea1095020def16365c418dd3a7541635d38a2916/mezzanine/forms/page_processors.py?at=default#cl-26
> .
>
> One problem you may run into is that I think that processor will always
> run, afaik there isn't a way to unregister a particular processor.
>
>
> On Tue, Mar 4, 2014 at 10:33 AM, Danny flack <[email protected]>wrote:
>
>> Hey Josh,
>>
>> Thanks for that.
>>
>> I believe I have a grasp on validating a custom form and returning it in
>> the page's context, but what would be the strategy when you've created a
>> page that has the "Form" content model, where you dynamically define all
>> the form fields in Mezzanine's admin? Is it possible to add validation to
>> those fields?
>>
>> I've attached a screenshot where the form fields were added.
>>
>> I may be going about this all wrong, but I just want to verify.
>>
>> Thanks
>>
>> On Tuesday, March 4, 2014 9:45:52 AM UTC-8, Josh Cartmell wrote:
>>
>>> Hey Danny,
>>>
>>> Check out the example at https://mezzanine.jupo.org/
>>> docs/content-architecture.html#page-processors, I think it will get you
>>> started down the right path and shows how to handle validation in a
>>> processor.
>>>
>>>
>>> On Tue, Mar 4, 2014 at 9:37 AM, Danny flack <[email protected]> wrote:
>>>
>>>> Is it possible to validate a form in a page processor?
>>>>
>>>> I know you're able to override the associated form by something like:
>>>>
>>>> *@processor_for('rsvp')*
>>>> *def rsvp_form(request, page): *
>>>>
>>>> * form = RsvpForm() # a custom form i created to override the
>>>> page's form *
>>>> * return {"form": form}*
>>>>
>>>> But how would you go about intercepting and adding custom validation to
>>>> the default page's form?
>>>>
>>>> For instance, I am trying to do something like:
>>>>
>>>> *@processor_for('rsvp')*
>>>> *def rsvp_form(request, page): *
>>>>
>>>> * form = page.getAssociatedForm() # fabricated method to get the
>>>> Page's form instance *
>>>> * form.addError('Some Error') # add custom validation*
>>>> * return {"form": form}*
>>>>
>>>>
>>>> Am I going down the wrong path? Is there another way to go about this?
>>>>
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>>>
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