What are the best practices for model validation in Django?

What are the best practices for model validation in Django?

Some best practices include using built-in validators, custom validation methods, and ensuring clear error messages.

Can you give an example of a custom validator?

Sure! You can create a custom validator by defining a function that raises a ValidationError if the data is invalid.

How do I implement this in my Django model?

You can implement it by adding the validator to the field definition in your model, like this: field_name = models.CharField(validators=[your_custom_validator]).

What about handling validation errors in forms?

You can handle validation errors in forms by overriding the clean method to add custom validation logic and return error messages.