Django docs state that a ModelForm will automatically set some field
attributes for auto generated form fields. Those attributes are limited to :
'required', 'verbose_name', 'help_text', and 'choices' (according to
https://docs.djangoproject.com/en/dev/topics/forms/modelforms/#django.forms.ModelForm
)
If the 'error_messages' attribute were also included, then there'd be just
one place to define all your error messages: the model. This makes cleaner
code, because you know there's only one way to look for error messages.
I use this function to make that happen:
def copy_model_error_messages( ModelFormType ):
for ( field_name, formField, ) in ModelFormType.__dict__[
'base_fields' ].items():
modelField = ModelFormType.Meta.model._meta.get_field(
field_name )
for ( message_key, message_value, ) in
modelField.error_messages.items( ):
formField.error_messages[ message_key ] =
message_value
I just call my function right after every ModelForm definition so that it
gets it's error messages from the model fields:
class MyModelForm( forms.ModelForm ):
...
class Meta:
...
copy_model_error_messages( MyModelForm )
Would you consider adding this feature to ModelForms?
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