What are some examples of custom user model validation?

What are some examples of custom user model validation?

Custom user model validation involves creating specific rules to ensure user data meets certain criteria. For example, you might validate that a user's email is in the correct format or that a password meets complexity requirements.

Can you give me a specific code example for email validation?

Sure! In Python, you can use a regular expression to validate an email like this:

import re

def is_valid_email(email):
    pattern = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
    return re.match(pattern, email) is not None

What about password validation rules?

For password validation, you might check for a minimum length, the presence of numbers, and special characters. Here's an example in Python:

def is_valid_password(password):
    return (len(password) >= 8 and 
            any(char.isdigit() for char in password) and 
            any(char in '!@#$%^&*()' for char in password))

Are there libraries that can help with validation?

Yes, there are several libraries like Cerberus for Python or Joi for JavaScript that can simplify data validation significantly.