poswald

# -*- coding: utf-8 -*-
# Author: Douglas Creager <[email protected]>
# This file is placed into the public domain.

# Calculates the current version number.  If possible, this is the
# output of “git describe”, modified to conform to the versioning
# scheme that setuptools uses.  If “git describe” returns an error
# (most likely because we're in an unpacked copy of a release tarball,
# rather than in a git working copy), then we fall back on reading the
# contents of the RELEASE-VERSION file.

poswald

'''Manager-based polymorphic model inheritance.

This module provides a non-intrusive approach for accessing polymorphically
instances of a model hierarchy. Non-intrusive means:
  - It does not require extending a custom ``Model`` base class or metaclass.
  - It does not require a ``ForeignKey`` to ``ContentType`` or the ``contenttypes``
    app in general. Instead the real class of an instance is determined based on
    the value (**polymorphic identity**) of a user-specified discriminating field
    (**polymorphic on**).
  - It does not override the default (or any other) model ``Manager`` (unless