[ActiveRecord] How to automatically bind, for example, :rows with Row or :user_id with User ?

rubyonrails-talk
1

Hello,

Imagine that I have the two following models : class A < ActiveRecord::Base belongs_to :b, :foreign => :fkey end

class B < ActiveRecord::Base end

Is it possible to retrieve both classes A and B and that column fkey is pointing to table B ? In other words, if I give :a and :fkey, how to obtain the class A and the fact that 'fkey' is a foreign key pointing to table 'B' ? I am almost sure that AR can do that, but this is not well-documented, and source-code is a bit obsucated...

Thank you in advance, Pierre L.

2

Hello,

Imagine that I have the two following models : class A < ActiveRecord::Base belongs_to :b, :foreign => :fkey end

class B < ActiveRecord::Base end

Is it possible to retrieve both classes A and B and that column fkey is pointing to table B ? In other words, if I give :a and :fkey, how to obtain the class A and the fact that 'fkey' is a foreign key pointing to table 'B' ?

If you're looking to introspect what associations have been setup then
you'd want to look at A.reflections.

Fred

3

Thank you !