Flowdock
method

association_primary_key

Importance_0
association_primary_key() public

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# File activerecord/lib/active_record/reflection.rb, line 226
      def association_primary_key
        @association_primary_key ||=
          options[:primary_key] ||
          !options[:polymorphic] && klass.primary_key ||
          'id'
      end
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