These functions are deprecated because of their limited use since the introduction of foreign keys to arbitrary columns in dm 0.2.1. Use dm_get_all_fks() with table manipulation functions instead.

dm_has_fk(dm, table, ref_table, ...)

dm_get_fk(dm, table, ref_table, ...)

## Arguments

dm

A dm object.

table

A table in the dm.

ref_table

The table which table will be referencing.

...

These dots are for future extensions and must be empty.