formset - how to set a from error from formset.clean?

[Richard Brockie]

Hi everyone,

In a formset I can use the .clean() method to validate data across the formset. The formset.clean() method is run after all the form.clean() methods - this makes sense. Raising a formset ValidationError alerts the user to the problem with formset.non_form_errors.

I would like to also set an error condition on one of more of the individual forms as a result of this formset validation failure to help identify the location of the problems (my formsets can be quite long and this will help guide the eye). I've spent quite a lot of time looking for such an example with no success. Is there a way I can do this?

Here's some pseudo-code to outline what I want to do:

call MyFormSet(BaseFormSet):
    def clean(self):
        super(MyFormSet, self).clean()

        # validation code goes here...

        if some_validation_error:
            raise ValidationError(...)    # creates the formset error message

            create_error_in_identified_forms(somehow)    # <<<< I want to know how to do this bit

Thanks & best wishes!
R.

[Collin Anderson]

Hi,

You might be able to do something like:

self.forms[3].add_error('field_name', 'error message')

https://docs.djangoproject.com/en/dev/ref/forms/api/#django.forms.Form.add_error

Collin

[Richard Brockie]

Thank you - that looks like what I am looking for! I don't know how I missed that.

I'm on 1.6 right now - another reason to move to 1.7 :)

R.

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    R.

Richard Brockie

Real-time bicycle race results - www.ontheday.net

[Richard Brockie]

Following up - this did the trick. Thanks for the pointer.
R.