0.3.3

Released: Sat Jun 02 2012

• [feature] New config argument
  "revision_environment=true", causes env.py to
  be run unconditionally when the "revision" command
  is run, to support script.py.mako templates with
  dependencies on custom "template_args".

• [feature] Added "template_args" option to configure()
  so that an env.py can add additional arguments
  to the template context when running the
  "revision" command. This requires either --autogenerate
  or the configuration directive "revision_environment=true".

• [bug] Added "type" argument to op.drop_constraint(),
  and implemented full constraint drop support for
  MySQL. CHECK and undefined raise an error.
  MySQL needs the constraint type
  in order to emit a DROP CONSTRAINT.

  References: #44

• [feature] Added version_table argument to
  EnvironmentContext.configure(), allowing for the
  configuration of the version table name.

  References: #34

• [feature] Added support for "relative" migration
  identifiers, i.e. "alembic upgrade +2",
  "alembic downgrade -1". Courtesy
  Atsushi Odagiri for this feature.

• [bug] Fixed bug whereby directories inside of
  the template directories, such as pycache
  on Pypy, would mistakenly be interpreted as
  files which are part of the template.

  References: #49