initial_count_for

# File activerecord/lib/active_record/associations/alias_tracker.rb, line 25
      def self.initial_count_for(connection, name, table_joins)
        # quoted_name should be downcased as some database adapters (Oracle) return quoted name in uppercase
        quoted_name = connection.quote_table_name(name).downcase

        counts = table_joins.map do |join|
          if join.is_a?(Arel::Nodes::StringJoin)
            # Table names + table aliases
            join.left.downcase.scan(
              /join(?:\s+\w+)?\s+(\S+\s+)?#{quoted_name}\son/
            ).size
          elsif join.respond_to? :left
            join.left.table_name == name ? 1 : 0
          else
            # this branch is reached by two tests:
            #
            # activerecord/test/cases/associations/cascaded_eager_loading_test.rb:37
            #   with :posts
            #
            # activerecord/test/cases/associations/eager_test.rb:1133
            #   with :comments
            #
            0
          end
        end

        counts.sum
      end