- Remove unncessary assignment.
- repoze.evolution no longer attempts to construe implicitly the version of
a database for which no version has been set explicitly. Previously, an
unversioned database was construed to already be at the software version.
The ZODBEvolutionManager performed a write on read, setting the database
version to the software when get_db_version() was called. The
constructor for ZODBEvolutionManager now accepts an optional argument,
initial_db_version, which specificies the version a database should be
considered to be if it does not already have a version set. The default
value is None. If a database has not already been marked to be at a
particular version, get_db_version() will return the initial database
version value. If this is None, attempts to call evolve_to_latest()
will fail with a ValueError. This represents a backwards incompatible
change, as databases for which no initial version is supplied explicitly will
now fail to evolve.
- Added new public method, set_db_version() to IEvolutionManager interface.