1 def execute_safely(manager, statement):  argument
8 def delete_duplicates(manager, table, first_id, second_id):  argument
22 def delete_invalid_foriegn_keys(manager, pivot_table, foreign_key_field,  argument
47 def create_unique_index(manager, pivot_table, first_field, second_field):  argument
59 def drop_unique_index(manager, pivot_table, first_field):  argument
72 def create_foreign_key_constraint(manager, table, field, destination_table):  argument
79 def drop_foreign_key_constraint(manager, table, field):  argument
84 def cleanup_m2m_pivot(manager, pivot_table, first_field, first_table,  argument
102 def reverse_cleanup_m2m_pivot(manager, pivot_table, first_field, second_field,  argument
124 def migrate_up(manager):  argument
131 def migrate_down(manager):  argument