OpenStack Study: 038_add_assignment_table.py

**** CubicPower OpenStack Study ****

def upgrade(migrate_engine):

    meta = sql.MetaData()

    meta.bind = migrate_engine

    sql.Table('role', meta, autoload=True)

    assignment_table = sql.Table(

        ASSIGNMENT_TABLE,

        meta,

        sql.Column('type', sql.Enum(

            assignment_sql.AssignmentType.USER_PROJECT,

            assignment_sql.AssignmentType.GROUP_PROJECT,

            assignment_sql.AssignmentType.USER_DOMAIN,

            assignment_sql.AssignmentType.GROUP_DOMAIN,

            name='type'),

            nullable=False),

        sql.Column('actor_id', sql.String(64), nullable=False),

        sql.Column('target_id', sql.String(64), nullable=False),

        sql.Column('role_id', sql.String(64), sql.ForeignKey('role.id'),

                   nullable=False),

        sql.Column('inherited', sql.Boolean, default=False, nullable=False),

        sql.PrimaryKeyConstraint('type', 'actor_id', 'target_id', 'role_id'))

    assignment_table.create(migrate_engine, checkfirst=True)

**** CubicPower OpenStack Study ****

def downgrade(migrate_engine):

    meta = sql.MetaData()

    meta.bind = migrate_engine

    assignment = sql.Table(ASSIGNMENT_TABLE, meta, autoload=True)

    assignment.drop(migrate_engine, checkfirst=True)