where!

# File activerecord/lib/active_record/relation/query_methods.rb, line 563
    def where!(opts = :chain, *rest) # :nodoc:
      if opts == :chain
        WhereChain.new(self)
      else
        if Hash === opts
          opts = sanitize_forbidden_attributes(opts)
          references!(PredicateBuilder.references(opts))
        end

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