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Location: kallithea/rhodecode/lib/dbmigrate/migrate/changeset/__init__.py - annotation
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follow Python conventions for boolean values
True and False might be singletons and the "default" values for "boolean"
expressions, but "all" values in Python has a boolean value and should be
evaluated as such. Checking with 'is True' and 'is False' is thus confusing,
error prone and unnessarily complex.
If we anywhere rely and nullable boolean fields from the database layer and
don't want the null value to be treated as False then we should check
explicitly for null with 'is None'.
True and False might be singletons and the "default" values for "boolean"
expressions, but "all" values in Python has a boolean value and should be
evaluated as such. Checking with 'is True' and 'is False' is thus confusing,
error prone and unnessarily complex.
If we anywhere rely and nullable boolean fields from the database layer and
don't want the null value to be treated as False then we should check
explicitly for null with 'is None'.
9753e0907827 9753e0907827 9753e0907827 9753e0907827 9753e0907827 9753e0907827 9753e0907827 9753e0907827 9753e0907827 9753e0907827 9753e0907827 9753e0907827 9753e0907827 9753e0907827 cf51bbfb120e 3bd2e94cbfc8 9753e0907827 7f31de1584c6 9753e0907827 9753e0907827 9753e0907827 9753e0907827 08d2dcd71666 08d2dcd71666 9753e0907827 3bd2e94cbfc8 3bd2e94cbfc8 3bd2e94cbfc8 9753e0907827 3bd2e94cbfc8 | """
This module extends SQLAlchemy and provides additional DDL [#]_
support.
.. [#] SQL Data Definition Language
"""
import re
import warnings
import sqlalchemy
from sqlalchemy import __version__ as _sa_version
warnings.simplefilter('always', DeprecationWarning)
_sa_version = tuple(int(re.match("\d+", x).group(0))
for x in _sa_version.split("."))
SQLA_06 = _sa_version >= (0, 6)
SQLA_07 = _sa_version >= (0, 7)
del re
del _sa_version
from rhodecode.lib.dbmigrate.migrate.changeset.schema import *
from rhodecode.lib.dbmigrate.migrate.changeset.constraint import *
sqlalchemy.schema.Table.__bases__ += (ChangesetTable,)
sqlalchemy.schema.Column.__bases__ += (ChangesetColumn,)
sqlalchemy.schema.Index.__bases__ += (ChangesetIndex,)
sqlalchemy.schema.DefaultClause.__bases__ += (ChangesetDefaultClause,)
|