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Django dynamic form attributes & clean methods
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| import types | |
| from django import forms | |
| class DynamicAttrsForm(forms.ModelForm): | |
| class Meta: | |
| model = models.DynamicAttrs | |
| fields = ['template', 'mood', 'text' ] | |
| def __init__(self, *args, **kwargs): | |
| super(DynamicAttrsForm, self).__init__(*args, **kwargs) | |
| # This method generator must leave out of the for loop, | |
| # and must return an indirected function, else bad things | |
| # will happen. | |
| def clean_sample_wrapper(sstype): | |
| def clean_sample_generic(self): | |
| sample = self.cleaned_data[sstype] | |
| if sample.mood != self.cleaned_data['mood']: | |
| raise forms.ValidationError( | |
| '%(sstype)s is not a sample of the selected mood!', | |
| params={'sstype': sstype}) | |
| return sample | |
| return clean_sample_generic | |
| for stid, stype in models.SAMPLE_TYPE_CHOICES.items(): | |
| stype = unicode(stype).lower() | |
| sstype = str(stype) | |
| queryset = models.Sample.objects.filter( | |
| is_published=True, conv_status=1, type=stid | |
| ).order_by('name') | |
| if self.instance.pk: | |
| self.fields[sstype] = forms.ModelChoiceField( | |
| label=stype, queryset=queryset, | |
| initial=self.instance.sample_set.get( | |
| sample__type=stid).sample.pk) | |
| else: | |
| self.fields[sstype] = forms.ModelChoiceField( | |
| label=stype, queryset=queryset) | |
| setattr(self, 'clean_{0}'.format(stype), | |
| types.MethodType(clean_sample_wrapper(sstype), self)) |
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