Solution for nested form

Question

I have been stuck on this problem for a while.

Need to make a form for competitions category with custom inputs. It should take all values fro

Answer 1

Sounds to me like you're looking for accepts_nested_attributes_for

See: https://apidock.com/rails/v3.2.3/ActiveRecord/NestedAttributes/ClassMethods/accepts_nested_attributes_for

https://rubyplus.com/articles/3681-Complex-Forms-in-Rails-5

Also, check out the cocoon gem.

Answer 2

Take a look at this gem: https://github.com/plataformatec/simple_form

Simple Form aims to be as flexible as possible while helping you with powerful components to create your forms.

Let's take a simple example:

class Machine < ActiveRecord::Base
has_many :parts , inverse_of: :machine
accepts_nested_attributes_for :parts
end

class Part < ActiveRecord::Base
# name:string
belongs_to :machine
end

With these models, we can use simple_form to update the machine and its associated parts in a single form:

<%= simple_form_for @machine do |m| %>
  <%= m.simple_fields_for :parts do |p| %>
  <%= p.input :name %>
  <% end %>
<% end %>

For 'new' action, build the nested model from the controller:

class MachinesController < ApplicationController
  def new
  @machine = Machine.new
  @machine.parts.build
 end
end

Source: https://github.com/plataformatec/simple_form/wiki/Nested-Models