22 def delete_invalid_foriegn_keys(manager, pivot_table, foreign_key_field,  argument
29         dict(table=pivot_table, field=foreign_key_field,
34                (deleted_count, pivot_table, foreign_key_field))
47 def create_unique_index(manager, pivot_table, first_field, second_field):  argument
48     index_name = unique_index_name(pivot_table)
50                     (index_name, pivot_table, first_field, second_field))
54     old_index_name = basic_index_name(pivot_table, first_field)
56                    (old_index_name, pivot_table))
59 def drop_unique_index(manager, pivot_table, first_field):  argument
60     index_name = unique_index_name(pivot_table)
61     manager.execute('DROP INDEX %s ON %s' % (index_name, pivot_table))
63     old_index_name = basic_index_name(pivot_table, first_field)
65                     (old_index_name, pivot_table, first_field))
84 def cleanup_m2m_pivot(manager, pivot_table, first_field, first_table,  argument
86     delete_duplicates(manager, pivot_table, first_field, second_field)
87     delete_invalid_foriegn_keys(manager, pivot_table, first_field, first_table)
88     delete_invalid_foriegn_keys(manager, pivot_table, second_field,
94         create_unique_index(manager, pivot_table, second_field, first_field)
96     create_foreign_key_constraint(manager, pivot_table, first_field,
98     create_foreign_key_constraint(manager, pivot_table, second_field,
102 def reverse_cleanup_m2m_pivot(manager, pivot_table, first_field, second_field,  argument
104     drop_foreign_key_constraint(manager, pivot_table, second_field)
105     drop_foreign_key_constraint(manager, pivot_table, first_field)
107         drop_unique_index(manager, pivot_table, second_field)