Rails在link_to中加参数

首先，说明post，get不一样
其次

link_to 'Link', request.parameters.merge({:per_page => 20})
link_to 'Link', params.merge({:per_page => 20})
link_to 'Whatever', :overwrite_params => { :pear_page => 20 }
link_to "some_other_link", "/search", :page => params[:page]