How to use delete_invalid_foriegn_keys method in autotest

Best Python code snippet using autotest_python

037_db_constraints.py

Source:037_db_constraints.py

...14                        (table, first_id, second_id),15                        first_id_value, second_id_value)16    if rows:17        print 'Deleted %s duplicate rows from %s' % (len(rows), table)18def delete_invalid_foriegn_keys(manager, pivot_table, foreign_key_field,19                                destination_table):20    manager.execute(21        'DELETE %(table)s.* FROM %(table)s '22        'LEFT JOIN %(destination_table)s '23        'ON %(table)s.%(field)s = %(destination_table)s.id '24        'WHERE %(destination_table)s.id IS NULL' %25        dict(table=pivot_table, field=foreign_key_field,26             destination_table=destination_table))27    deleted_count = manager._database.rowcount28    if deleted_count:29        print ('Deleted %s invalid foreign key references from %s (%s)' %30               (deleted_count, pivot_table, foreign_key_field))31def unique_index_name(table):32    return table + '_both_ids'33def basic_index_name(table, field):34    if field == 'aclgroup_id':35        field = 'acl_group_id'36    return table + '_' + field37def create_unique_index(manager, pivot_table, first_field, second_field):38    index_name = unique_index_name(pivot_table)39    manager.execute('CREATE UNIQUE INDEX %s ON %s (%s, %s)' %40                    (index_name, pivot_table, first_field, second_field))41    # these indices are in the migrations but may not exist for historical42    # reasons43    old_index_name = basic_index_name(pivot_table, first_field)44    execute_safely(manager, 'DROP INDEX %s ON %s' %45                   (old_index_name, pivot_table))46def drop_unique_index(manager, pivot_table, first_field):47    index_name = unique_index_name(pivot_table)48    manager.execute('DROP INDEX %s ON %s' % (index_name, pivot_table))49    old_index_name = basic_index_name(pivot_table, first_field)50    manager.execute('CREATE INDEX %s ON %s (%s)' %51                    (old_index_name, pivot_table, first_field))52def foreign_key_name(table, field):53    return '_'.join([table, field, 'fk'])54def create_foreign_key_constraint(manager, table, field, destination_table):55    key_name = foreign_key_name(table, field)56    manager.execute('ALTER TABLE %s ADD CONSTRAINT %s FOREIGN KEY (%s) '57                    'REFERENCES %s (id) ON DELETE NO ACTION' %58                    (table, key_name, field, destination_table))59def drop_foreign_key_constraint(manager, table, field):60    key_name = foreign_key_name(table, field)61    manager.execute('ALTER TABLE %s DROP FOREIGN KEY %s' % (table, key_name))62def cleanup_m2m_pivot(manager, pivot_table, first_field, first_table,63                      second_field, second_table, create_unique):64    delete_duplicates(manager, pivot_table, first_field, second_field)65    delete_invalid_foriegn_keys(manager, pivot_table, first_field, first_table)66    delete_invalid_foriegn_keys(manager, pivot_table, second_field,67                                second_table)68    if create_unique:69        # first field is the more commonly used one, so we'll replace the70        # less-commonly-used index with the larger unique index71        create_unique_index(manager, pivot_table, second_field, first_field)72    create_foreign_key_constraint(manager, pivot_table, first_field,73                                  first_table)74    create_foreign_key_constraint(manager, pivot_table, second_field,75                                  second_table)76def reverse_cleanup_m2m_pivot(manager, pivot_table, first_field, second_field,77                              drop_unique):78    drop_foreign_key_constraint(manager, pivot_table, second_field)79    drop_foreign_key_constraint(manager, pivot_table, first_field)80    if drop_unique:...

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