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# exceptions.py - exceptions for SQLAlchemy
# Copyright (C) 2005, 2006, 2007 Michael Bayer mike_mp@zzzcomputing.com
#
# This module is part of SQLAlchemy and is released under
# the MIT License: http://www.opensource.org/licenses/mit-license.php
class SQLAlchemyError(Exception):
"""Generic error class."""
pass
class SQLError(SQLAlchemyError):
"""Raised when the execution of a SQL statement fails.
Includes accessors for the underlying exception, as well as the
SQL and bind parameters.
"""
def __init__(self, statement, params, orig):
SQLAlchemyError.__init__(self, "(%s) %s"% (orig.__class__.__name__, str(orig)))
self.statement = statement
self.params = params
self.orig = orig
def __str__(self):
return SQLAlchemyError.__str__(self) + " " + repr(self.statement) + " " + repr(self.params)
class ArgumentError(SQLAlchemyError):
"""Raised for all those conditions where invalid arguments are
sent to constructed objects. This error generally corresponds to
construction time state errors.
"""
pass
class CompileError(SQLAlchemyError):
"""Raised when an error occurs during SQL compilation"""
pass
class TimeoutError(SQLAlchemyError):
"""Raised when a connection pool times out on getting a connection."""
pass
class ConcurrentModificationError(SQLAlchemyError):
"""Raised when a concurrent modification condition is detected."""
pass
class CircularDependencyError(SQLAlchemyError):
"""Raised by topological sorts when a circular dependency is detected"""
pass
class FlushError(SQLAlchemyError):
"""Raised when an invalid condition is detected upon a ``flush()``."""
pass
class InvalidRequestError(SQLAlchemyError):
"""SQLAlchemy was asked to do something it can't do, return
nonexistent data, etc.
This error generally corresponds to runtime state errors.
"""
pass
class NoSuchTableError(InvalidRequestError):
"""SQLAlchemy was asked to load a table's definition from the
database, but the table doesn't exist.
"""
pass
class AssertionError(SQLAlchemyError):
"""Corresponds to internal state being detected in an invalid state."""
pass
class NoSuchColumnError(KeyError, SQLAlchemyError):
"""Raised by ``RowProxy`` when a nonexistent column is requested from a row."""
pass
class DBAPIError(SQLAlchemyError):
"""Something weird happened with a particular DBAPI version."""
def __init__(self, message, orig):
SQLAlchemyError.__init__(self, "(%s) (%s) %s"% (message, orig.__class__.__name__, str(orig)))
self.orig = orig
class DisconnectionError(SQLAlchemyError):
"""Raised within ``Pool`` when a disconnect is detected on a raw DBAPI connection."""
pass
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