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class RequestInitializationError(Exception):
"""Raised when a Request cannot successfully be initialized"""
class UnimplementedEndpointError(RequestInitializationError):
"""Raised when a Request path does not point to a module."""
class MissingRequestParameterError(RequestInitializationError):
"""Raised when a Request does not contain one or more required parameters."""
class UnsupportedMethodError(RequestInitializationError):
"""Raised when a Request does not use a supported REST method.
The method must be in all-caps, supported by REST, and implemented by the module.
"""
class AuthorizationTokenError(RequestInitializationError):
"""Raised when an authorization token is not correctly verified."""
class ForeignKeyError(Exception):
"""Raised when a foreign key constraint is not met."""
class RowNotFoundError(Exception):
"""Raised when a database row is not found."""
def __init__(self, table_name):
super(RowNotFoundError, self).__init__(
'Row in `{}` table not found.'.format(table_name)
)
self.table_name = table_name
class ParameterError(Exception):
"""Raised when a parameter is either missing or incorrectly typed."""
class IncorrectParameterError(ParameterError):
"""Raised when a parameter is of the wrong type."""
def __init__(self, parameter_name, parameter_location):
super(IncorrectParameterError, self).__init__(
'Incorrectly typed `{}` {} parameter.'.format(
parameter_name,
parameter_location
)
)
self.parameter_name = parameter_name
self.parameter_location = parameter_location
class MissingParameterError(ParameterError):
"""Raised when a parameter is missing."""
def __init__(self, parameter_name, parameter_location):
super(MissingParameterError, self).__init__(
'Missing required `{}` {} parameter.'.format(
parameter_name,
parameter_location
)
)
self.parameter_name = parameter_name
self.parameter_location = parameter_location
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