def upgrade_audit():
    # try: if the clients column is already the audit table
    engine = op.get_bind().engine

    # first get all potential audit tables
    audit_table_names = get_audit_table_name(engine)

    for audit_table_name in audit_table_names:
        # check if there is already a client column
        if table_has_column(engine, audit_table_name, 'client') == False:
            op.add_column(audit_table_name, sa.Column('client', sa.types.Unicode(length=80)))

    return
def upgrade_audit():
    # try: if the clients column is already the audit table
    engine = op.get_bind().engine

    # first get all potential audit tables
    audit_table_names = get_audit_table_name(engine)

    for audit_table_name in audit_table_names:
        # check if there is already a client column
        if table_has_column(engine, audit_table_name, 'client') == False:
            op.add_column(audit_table_name, sa.Column('client', sa.types.Unicode(length=80)))

    return