What are factory_boy validators and how do they work?

What are factory_boy validators and how do they work?

Factory_boy validators are used to enforce constraints on the data generated by factories in Python. They help ensure that the generated data meets specific criteria.

Can you give me an example of how to use a validator in factory_boy?

Sure! You can define a validator by using the validate argument in your factory. For example:

from factory import Factory, Faker
from factory.validators import MinValueValidator

class UserFactory(Factory):
    class Meta:
        model = User

    age = Faker('random_int', min=18, max=90, step=1, validators=[MinValueValidator(18)])

This ensures that the age generated is always 18 or older.

What happens if the validation fails?

If the validation fails, factory_boy will raise a ValidationError, and the object will not be created until the data meets the specified criteria.

Are there built-in validators in factory_boy?

Yes, factory_boy comes with several built-in validators like MinValueValidator, MaxValueValidator, and EmailValidator that you can use to validate your fields.