Nested Form

Nested form is a rails gem to manage multiple nested models in a single form. Dynamically we can add and remove fields using jQuery.

Add gem to Gemfile and run bundle to install it

gem "nested_form"

Add jquery_form in application.js

//= require jquery_nested_form

Then use the nested_form_for helper method to enable the nesting.

<%= nested_form_for @projects do |f| %>

use link_to_add and link_to_remove to dynamically add or remove records

<%= f.fields_for :tasks do |task_form| %>
 <%= task_form.text_field :name %>
 <%= task_form.link_to_remove "Remove this task" %>
<% end %>
<p><%= f.link_to_add "Add a task", :tasks %></p>