method

association_primary_key

v4.2.1 - Show latest stable - Class: ActiveRecord::Reflection::ThroughReflection

association_primary_key(klass = nil)

public

We want to use the klass from this reflection, rather than just delegate straight to the source_reflection, because the source_reflection may be polymorphic. We still need to respect the source_reflection’s :primary_key option, though.

# File activerecord/lib/active_record/reflection.rb, line 770
      def association_primary_key(klass = nil)
        # Get the "actual" source reflection if the immediate source reflection has a
        # source reflection itself
        actual_source_reflection.options[:primary_key] || primary_key(klass || self.klass)
      end

association_primary_key

Related methods