app/django/contrib/gis/geos/error.py
author Augie Fackler <durin42@gmail.com>
Tue, 07 Jul 2009 20:17:23 -0500
changeset 2587 ec7818110fd2
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Start using buildout to bring in external dependencies. This makes running tests easier in situations where dependencies are not always available, such as buildbot. Thanks to Matthew Wilkes <matthew@matthewwilkes.co.uk> for help and moral support.

"""
 This module houses the GEOS exceptions, specifically, GEOSException and
 GEOSGeometryIndexError.
"""

class GEOSException(Exception):
    "The base GEOS exception, indicates a GEOS-related error."
    pass

class GEOSIndexError(GEOSException, KeyError):
    """
    This exception is raised when an invalid index is encountered, and has
    the 'silent_variable_feature' attribute set to true.  This ensures that
    django's templates proceed to use the next lookup type gracefully when
    an Exception is raised.  Fixes ticket #4740.
    """
    # "If, during the method lookup, a method raises an exception, the exception
    #  will be propagated, unless the exception has an attribute 
    #  `silent_variable_failure` whose value is True." -- Django template docs.
    silent_variable_failure = True