jQuery Plugin for multiple line-item forms

I have a form that acts as a frontend to entities in a 1:many relationship. The form lets the user edit the properties for the parent entity, as well as add, edit, and delete properties for the child entities.

This is such a common scenario that I expect someone has 开发者_运维技巧already come up with an elegant jQuery plugin to help make a user-friendly form. However, I haven't found one yet (I don't think I'm hitting quite the right combination of Google keywords).

Can anyone suggest a jQuery plugin that helps create forms for editing child entitites/line items?

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not a "plug-in" but a good example of using jquery, with reusable code, to do it in rails http://railscasts.com/episodes/197-nested-model-form-part-2