custom_join_ast

# File activerecord/lib/active_record/relation/query_methods.rb, line 292
    def custom_join_ast(table, joins)
      joins = joins.reject { |join| join.blank? }

      return [] if joins.empty?

      @implicit_readonly = true

      joins.map do |join|
        case join
        when Array
          join = Arel.sql(join.join(' ')) if array_of_strings?(join)
        when String
          join = Arel.sql(join)
        end
        table.create_string_join(join)
      end
    end