Hi, Russell, thanks for answering :-)
Your answer helps me, but not completely. I can add the error with this:
self._errors.append({'formula': self.error_class([msg])}) #
self._errors in a BaseInlineFormSet is a list of dictionaries, not a
dictionary, like you say.
But I don't know how to reach the cleaned_data of the parent form. If I do
this:
del self.cleaned_data['formula']
It says that the parent form doesn't have a 'cleaned_data' attribute.
So I can make the InlineFormSet validation fail, but I can't show the error
in my template.
Any suggestion?
Thank you!!
El lunes, 2 de junio de 2014 02:26:56 UTC+2, Russell Keith-Magee escribió:
>
> Hi Cesar,
>
> It's all the documentation:
>
>
> https://docs.djangoproject.com/en/dev/topics/forms/formsets/#custom-formset-validation
>
> You just have to raise a ValidationError(); Django will then add an error
> that spans the entire formset.
>
> If you want to evaluate errors in clean(), but force the actual error to
> appear against a specific field, that's possible too - you just need to
> emulate what Django is doing behind the scenes. That means inserting the
> error into the error dictionary, and removing the error value from
> cleaned_data:
>
> self._errors['field name'] = self.error_class(['This field has a
> problems'])
> del cleaned_data['field_name']
>
> You might need to do this if you won't know if a specific value is valid
> until you've checked all the individual values (e.g., A must be greater
> than B - you can't check that until you know both A and B exist, which
> won't be the case in the clean_A and clean_B methods)
>
> I hope that helps!
>
> Yours,
> Russ Magee %-)
>
>
>
> On Sun, Jun 1, 2014 at 11:52 PM, César García Tapia <[email protected]
> <javascript:>> wrote:
>
>> Hi. I already asked this question in StackOverflow, but I didn't get any
>> useful answer. Let's try here :-)
>>
>> I have a BaseInlineFormSet, and I'd like to validate a field in the
>> parent form based on the values on the fields of the children. As seen in
>> the docs, the only method to make a custom validation is clean(), but I
>> can't find a way to add errors to the parent form, only for the children.
>>
>> In the following code I build a formula. Each variable comes from a inner
>> form, and if the global formula don't validate, I'd like to add an error to
>> the parent's form field formula
>>
>> class CustomInlineFormSet(BaseInlineFormSet):
>> def clean(self):
>> formula = self.instance.formula
>> variables = []
>> for form in self.forms:
>> if 'formula_variable' in form.cleaned_data:
>> variables.append(form.cleaned_data['formula_variable'])
>>
>> valid, msg = validate_formula(formula, variables)
>> if not valid:
>> WHAT HERE???
>>
>> Thank you!!
>>
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