where!

# File activerecord/lib/active_record/relation/query_methods.rb, line 539
    def where!(opts = :chain, *rest) # :nodoc:
      if opts == :chain
        WhereChain.new(self)
      else
        references!(PredicateBuilder.references(opts)) if Hash === opts

        self.where_values += build_where(opts, rest)
        self
      end
    end