Two columns in Rails foreign key migrations

Question

Regards!

I can add foreign key to table in Rails migration on this way:

add_foreign_key :teachers, :departamentos, name: "teachers_departamento_id", 
column: :codigo_departamento, primary_key: :codigo

But, How do I add two columns into foreign key?

Thanks.

can you explain what functionality you want to achieve by doing this ? — M. Habib, Nov 04 '18 at 04:28

score 0 · Answer 1 · answered Nov 04 '18 at 04:26

0

You can do this like

add_index :table, ["column1", "column2"], :unique => true

based on this question from SO

answered Nov 04 '18 at 04:26

M. Habib

Thanks by answering. That add index only but don't add the foreign key. – Johan Donado B. Nov 05 '18 at 12:55

1 Answers1