OpenStack Study: 176a85fc7d79_add_portbindings_db.py

**** CubicPower OpenStack Study ****

def upgrade(active_plugins=None, options=None):

    if not migration.should_run(active_plugins, migration_for_plugins):

        return

    op.create_table(

        'portbindingports',

        sa.Column('port_id', sa.String(length=36), nullable=False),

        sa.Column('host', sa.String(length=255), nullable=False),

        sa.ForeignKeyConstraint(['port_id'], ['ports.id'], ondelete='CASCADE'),

        sa.PrimaryKeyConstraint('port_id')

    )

**** CubicPower OpenStack Study ****

def downgrade(active_plugins=None, options=None):

    if not migration.should_run(active_plugins, migration_for_plugins):

        return

    op.drop_table('portbindingports')