Cocoon Gem Example: How to Implement Cocoon Gem in Rails 6?
In this tutorial, we learn how to create complex and dynamic rails form using the cocoon gem in Ruby on Rails.
Suppose you want to create a form in which you want your users to enter their friends’ names. You do not know in advance how many friends your user will have, so how to add a specific number of fields in the layout?
Rails do not have any built-in support to answer this question. Thus, to resolve this issue, we can use cocoon gem. Cocoon powers nested forms with JavaScript, allowing fields to be added or removed dynamically.
In this cocoon gem example, we will see how to use cocoon gem to add or remove nested fields asynchronously without generating a new request. We will develop a demo where users can add n number of friends. So, the friend’s name will be a nested attribute of the user’s name.
Quick Read:-55 RoR Gems: Pin To Plane For Developing RoR Application
Goal of Cocoon Gem Tutorial
Before starting with our Cocoon gem example, let’s see the video of the nested form which we will implement.
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