Module rules

Built-in Validation Rules

Provides common validation rules ready to use:

Basic Type Validation

• required() - Value must not be null
• string() - Value must be a string
• integer() - Value must be an integer
• float() - Value must be a float
• boolean() - Value must be a boolean
• array() - Value must be an array
• object() - Value must be an object

String Validation

• length(n) - Exact length
• min_length(n) - Minimum length
• max_length(n) - Maximum length
• email() - Valid email format
• url() - Valid URL format
• ip() - Valid IP address
• regex() - Matches regex pattern

Numeric Validation

• min_value(n) - Minimum numeric value
• max_value(n) - Maximum numeric value
• equal(n) - Exact value match

Collection Validation

• in_values() - Value must be in allowed set
• not_in_values() - Value must not be in excluded set

Database Validation

• unique() - Field value must be unique in MongoDB collection

Custom Validation

• custom() - Implement custom validation logic

Structs

Rule

Factory for creating validation rules