使用Jquery在Rails3中动态添加/删除字段到表单

Question

有谁知道使用rails3中的JQuery在表单中动态添加字段的简单/便捷方法或最佳方法？

Answer 1

Regardless what server-side language you're using, you can just create elements with the jQuery constructor and append it to a form node. For instance:

$('<input>', {
    id:   'my_new_input_id',
}).appendTo($('#my_form_id'));

would create a new input control and append it to a form with the id my_form_id .

edit

relating to your comment: To remove a dynamically created element, a good approach is to store a reference in a variable. Doing that you can call .remove() or .detach() later:

var my_new_input_element = $('<input>', {
    id:   'my_new_input_id',
}).appendTo($('#my_form_id'));

// ... lots of code

my_new_input_element.remove();

ref.: .appendTo , .remove() , .detach()