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create_has_and_belongs_to_many_reflection

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create_has_and_belongs_to_many_reflection(association_id, options, &extension) private

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# File activerecord/lib/active_record/associations.rb, line 1385
        def create_has_and_belongs_to_many_reflection(association_id, options, &extension)
          options.assert_valid_keys(
            :class_name, :table_name, :join_table, :foreign_key, :association_foreign_key,
            :select, :conditions, :include, :order, :group, :limit, :offset,
            :uniq,
            :finder_sql, :delete_sql, :insert_sql,
            :before_add, :after_add, :before_remove, :after_remove,
            :extend, :readonly
          )

          options[:extend] = create_extension_modules(association_id, extension, options[:extend])

          reflection = create_reflection(:has_and_belongs_to_many, association_id, options, self)

          reflection.options[:join_table] ||= join_table_name(undecorated_table_name(self.to_s), undecorated_table_name(reflection.class_name))

          reflection
        end
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