Ruby rails 页面跳转(render和redirect_to)

if @user.update_attributes(:password => params[:user][:password])
flash[:notice] = '密码修改完成'
redirect_to :action => 'index'
else
redirect_to :action => 'change_pass', :id => @user
end

redirect_to :action => 'edit', :id => 7
redirect_to "http://wiisola.javaeye.com/"
redirect_to "/images/1.jpg"
redirect_to :back

render(:text => string)
render(:inline => string, [:type => "rhtml"|"rxml"])
render(:action => action_name)
render(:file => path, [:use_full_path => true|false])
render(:template => name)
render(:partial => name)
render(:nothing=>true)
render()

def search
@results =Search.find(params[:query])
case @results
when 0 then render :action=> "no_results"
when 1 then render :action=> "show"
when 2..10 then render :action=> "show_many"
end
end
def search
@results =Search.find(params[:query])
case @results
when 0 then render :action=> "no_results"
when 1 then render :action=> "show"
when 2..10 then render :action=> "show_many"
end
end