Accessing a child table from a parent table in rails

Question

I have two table: bids and credit_operations . In my models I have;

bid.rb: has_one :credit_operation

credit_operation.rb belongs_to :bid

In credit_operation table I have bid_id column. How can I access some attributes in the credit_operations table from bids_controller.rb ?

Answer 1

to help others: The error was being produced because there was an empty attribute in the field than I was accessing.

meaning bid.credit_operation could not work. but testing first made it work. so I used:

bid.creditoperation_id ? bid.creditoperation.name : ""

testing first if it is present, if true then bid.creditoperation.name is returned, otherwise returns empty