在Rails 3中使用jQuery渲染更多部分内容

I have a model (let's say it's a User) that has many Images. I build 3 image records in the controller and render partials for each one in the view. But what if people want to add more than 3 pictures? I'd like to make an "Add another image" link that builds another image record and renders another partial.I have a model (let's say it's a User) that has