method

association_primary_key

rails 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 878
      def association_primary_key(klass = nil)
        # Get the "actual" source reflection if the immediate source reflection has a
        # source reflection itself
        if primary_key = actual_source_reflection.options[:primary_key]
          @association_primary_key ||= -primary_key.to_s
        else
          primary_key(klass || self.klass)
        end
      end

association_primary_key

Method deprecated or moved

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