tatami.validation module

Data validation utilities for Tatami framework.

This module provides comprehensive validation for input parameters based on type annotations.

exception tatami.validation.ValidationException(field_name, value, expected_type, message=None)

Bases: Exception

Custom exception for validation errors.

Parameters:

• field_name (str)

• value (Any)

• expected_type (type)

• message (str)

__init__(field_name, value, expected_type, message=None)

Parameters:

• field_name (str)

• value (Any)

• expected_type (type)

• message (str)

tatami.validation.create_multiple_validation_errors_response(errors)

Create a response for multiple validation errors using RFC 7807 Problem Details format.

Parameters:

errors (list[ValidationException]) – List of validation exceptions

Returns:

JSONResponse with all error details in RFC 7807 format

Return type:

JSONResponse

tatami.validation.create_validation_error_response(error)

Create a standardized error response for validation failures using RFC 7807 Problem Details format.

Parameters:

error (ValidationException) – The validation exception

Returns:

JSONResponse with error details in RFC 7807 format

Return type:

JSONResponse

tatami.validation.validate_parameter(value, annotation, field_name, allow_none=False)

Validate a parameter value against its type annotation.

Parameters:

• value (Any) – The value to validate

• annotation (type) – The type annotation

• field_name (str) – Name of the field for error reporting

• allow_none (bool) – Whether None values are allowed

Returns:

The validated and converted value

Raises:

ValidationException – If validation fails

Return type:

Any