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How to create custom error messages with model forms with Python Django?

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Sometimes, we want to create custom error messages with model forms with Python Django.

In this article, we’ll look at how to create custom error messages with model forms with Python Django.

How to create custom error messages with model forms with Python Django?

To create custom error messages with model forms with Python Django, we can add error_messages to Meta class of the form class.

For instance, we write

class AuthorForm(ModelForm):
    class Meta:
        model = Author
        fields = ('name', 'title', 'birth_date')
        labels = {
            'name': _('Writer'),
        }
        help_texts = {
            'name': _('Some useful help text.'),
        }
        error_messages = {
            'name': {
                'max_length': _("This writer's name is too long."),
            },
        }

to create the AuthorForm class that has the Meta class that has the error messages.

In Meta, we add the error_messages static field that’s set to a dictionary with the field name as the keys and the validation error message dictionaries as the values.

Conclusion

To create custom error messages with model forms with Python Django, we can add error_messages to Meta class of the form class.

By John Au-Yeung

Web developer specializing in React, Vue, and front end development.

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