Creating a Marshmallow User Data Validation Schema

This function creates a Marshmallow Schema that is used for validating user data. The Schema includes basic user information fields and performs necessary validations on these fields.

Technology Stack : Python, Marshmallow

Code Type : Python Function

Code Difficulty : Intermediate

                
                    
from marshmallow import Schema, fields, ValidationError, validates, ValidationError

def validate_length(data, field):
    if len(data) < 5:
        raise ValidationError("The field must be at least 5 characters long.")

def create_user_schema():
    class UserSchema(Schema):
        id = fields.Int(required=True)
        name = fields.Str(required=True)
        email = fields.Email(required=True)
        age = fields.Int(required=True, validate=lambda x: x > 0)
        bio = fields.Str(validate=validate_length)
    
    return UserSchema()

# JSON Explanation