method

build_join_buckets

v6.1.7.7 - Show latest stable - 0 notes - Class: ActiveRecord::QueryMethods

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build_join_buckets() private

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# File activerecord/lib/active_record/relation/query_methods.rb, line 1212
      def build_join_buckets
        buckets = Hash.new { |h, k| h[k] = [] }

        unless left_outer_joins_values.empty?
          stashed_left_joins = []
          left_joins = select_association_list(left_outer_joins_values, stashed_left_joins) do
            raise ArgumentError, "only Hash, Symbol and Array are allowed"
          end

          if joins_values.empty?
            buckets[:association_join] = left_joins
            buckets[:stashed_join] = stashed_left_joins
            return buckets, Arel::Nodes::OuterJoin
          else
            stashed_left_joins.unshift construct_join_dependency(left_joins, Arel::Nodes::OuterJoin)
          end
        end

        joins = joins_values.dup
        if joins.last.is_a?(ActiveRecord::Associations::JoinDependency)
          stashed_eager_load = joins.pop if joins.last.base_klass == klass
        end

        joins.each_with_index do |join, i|
          joins[i] = Arel::Nodes::StringJoin.new(Arel.sql(join.strip)) if join.is_a?(String)
        end

        while joins.first.is_a?(Arel::Nodes::Join)
          join_node = joins.shift
          if !join_node.is_a?(Arel::Nodes::LeadingJoin) && (stashed_eager_load || stashed_left_joins)
            buckets[:join_node] << join_node
          else
            buckets[:leading_join] << join_node
          end
        end

        buckets[:association_join] = select_association_list(joins, buckets[:stashed_join]) do |join|
          if join.is_a?(Arel::Nodes::Join)
            buckets[:join_node] << join
          else
            raise "unknown class: %s" % join.class.name
          end
        end

        buckets[:stashed_join].concat stashed_left_joins if stashed_left_joins
        buckets[:stashed_join] << stashed_eager_load if stashed_eager_load

        return buckets, Arel::Nodes::InnerJoin
      end

build_join_buckets

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