Question

Im trying to set up a has one relationship in RoR. An agreement has one contact. In the agreement table there is a column called contact_id.

When i try to call an agreenment’s contact like so: <%= agreement.contact.name %> (contact table has a column name) I get the error Unknown column 'contacts.agreement_id' Where it should be looking for agreement.contact_id

Any suggestions?

Answer 1

Your contacts table needs the foreign key migration added, i.e. you need to create a column agreement_id as integer. Make sure you do rake db:migrate and this should work.

Remember, the FK is on the ‘belongs_to’ table side of the relationship. So, an agreement has_one contact and contact belongs_to agreement.