##// END OF EJS Templates
follow Python conventions for boolean values...
follow Python conventions for boolean values True and False might be singletons and the "default" values for "boolean" expressions, but "all" values in Python has a boolean value and should be evaluated as such. Checking with 'is True' and 'is False' is thus confusing, error prone and unnessarily complex. If we anywhere rely and nullable boolean fields from the database layer and don't want the null value to be treated as False then we should check explicitly for null with 'is None'.

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exceptions.py
84 lines | 1.8 KiB | text/x-python | PythonLexer
"""
Provide exception classes for :mod:`migrate`
"""
class Error(Exception):
"""Error base class."""
class ApiError(Error):
"""Base class for API errors."""
class KnownError(ApiError):
"""A known error condition."""
class UsageError(ApiError):
"""A known error condition where help should be displayed."""
class ControlledSchemaError(Error):
"""Base class for controlled schema errors."""
class InvalidVersionError(ControlledSchemaError):
"""Invalid version number."""
class DatabaseNotControlledError(ControlledSchemaError):
"""Database should be under version control, but it's not."""
class DatabaseAlreadyControlledError(ControlledSchemaError):
"""Database shouldn't be under version control, but it is"""
class WrongRepositoryError(ControlledSchemaError):
"""This database is under version control by another repository."""
class NoSuchTableError(ControlledSchemaError):
"""The table does not exist."""
class PathError(Error):
"""Base class for path errors."""
class PathNotFoundError(PathError):
"""A path with no file was required; found a file."""
class PathFoundError(PathError):
"""A path with a file was required; found no file."""
class RepositoryError(Error):
"""Base class for repository errors."""
class InvalidRepositoryError(RepositoryError):
"""Invalid repository error."""
class ScriptError(Error):
"""Base class for script errors."""
class InvalidScriptError(ScriptError):
"""Invalid script error."""
# migrate.changeset
class NotSupportedError(Error):
"""Not supported error"""
class InvalidConstraintError(Error):
"""Invalid constraint error"""
class MigrateDeprecationWarning(DeprecationWarning):
"""Warning for deprecated features in Migrate"""