unscope!

# File activerecord/lib/active_record/relation/query_methods.rb, line 432
    def unscope!(*args) # :nodoc:
      self.unscope_values += args

      args.each do |scope|
        case scope
        when Symbol
          scope = :left_outer_joins if scope == :left_joins
          if !VALID_UNSCOPING_VALUES.include?(scope)
            raise ArgumentError, "Called unscope() with invalid unscoping argument ':#{scope}'. Valid arguments are :#{VALID_UNSCOPING_VALUES.to_a.join(", :")}."
          end
          assert_mutability!
          @values.delete(scope)
        when Hash
          scope.each do |key, target_value|
            if key != :where
              raise ArgumentError, "Hash arguments in .unscope(*args) must have :where as the key."
            end

            target_values = resolve_arel_attributes(Array.wrap(target_value))
            self.where_clause = where_clause.except(*target_values)
          end
        else
          raise ArgumentError, "Unrecognized scoping: #{args.inspect}. Use .unscope(where: :attribute_name) or .unscope(:order), for example."
        end
      end

      self
    end