plugin_base.py 文件源码

def _prep_testing_database(options, file_config):
    from alembic.testing import config
    from alembic.testing.exclusions import against
    from sqlalchemy import schema
    from alembic import util

    if util.sqla_08:
        from sqlalchemy import inspect
    else:
        from sqlalchemy.engine.reflection import Inspector
        inspect = Inspector.from_engine

    if options.dropfirst:
        for cfg in config.Config.all_configs():
            e = cfg.db
            inspector = inspect(e)
            try:
                view_names = inspector.get_view_names()
            except NotImplementedError:
                pass
            else:
                for vname in view_names:
                    e.execute(schema._DropView(
                        schema.Table(vname, schema.MetaData())
                    ))

            if config.requirements.schemas.enabled_for_config(cfg):
                try:
                    view_names = inspector.get_view_names(
                        schema="test_schema")
                except NotImplementedError:
                    pass
                else:
                    for vname in view_names:
                        e.execute(schema._DropView(
                            schema.Table(vname, schema.MetaData(),
                                         schema="test_schema")
                        ))

            for tname in reversed(inspector.get_table_names(
                    order_by="foreign_key")):
                e.execute(schema.DropTable(
                    schema.Table(tname, schema.MetaData())
                ))

            if config.requirements.schemas.enabled_for_config(cfg):
                for tname in reversed(inspector.get_table_names(
                        order_by="foreign_key", schema="test_schema")):
                    e.execute(schema.DropTable(
                        schema.Table(tname, schema.MetaData(),
                                     schema="test_schema")
                    ))

            if against(cfg, "postgresql") and util.sqla_100:
                from sqlalchemy.dialects import postgresql
                for enum in inspector.get_enums("*"):
                    e.execute(postgresql.DropEnumType(
                        postgresql.ENUM(
                            name=enum['name'],
                            schema=enum['schema'])))