Strong params not saved in nested form - ruby-on-rails

Question

In my app I want to create events that have nameand price
In these events I want to be able to add participants they have a first_nameand a salary
I am using the gem Cocoon for the nested forms
From the EventsController I am trying to create my participants...
I don't manage to get the right way to do this...
EventsController
class EventsController < ApplicationController
def new
#event = Event.new
#participant = Participant.new
end
def create
#event = Event.create(params_event)
if #event.save
#event.participants.create([{first_name: params[:first_name], salary: params[:salary], event_id: params[:id]}])
#binding.pry
redirect_to #event
end
end
def show
#event = Event.find(params[:id])
end
private
def params_event
params
.require(:event).permit(:name,:total_price,
participants_attributes: [:first_name, :salary, :_destroy ] )
end
end
I want that my create methode render an array of participants in the given event like this...
#event.participants.create!([john={first_name: "John", salary: 2000, event_id: params[:id]}, mike={first_name: "Mike", salary: 1400, event_id: params[:id]}])
Here is the result of binding.pry
8: def create
9: #event = Event.create(params_event)
10: if #event.save
11: #event.participants.create([{first_name: params[:first_name], salary: params[:salary], event_id: params[:id]}])
12: ##event.participants.create!([john={first_name: "John", salary: 2000, event_id: params[:id]}, mike={first_name: "Mike", salary: 1400, event_id: params[:id]}])
13: binding.pry
=> 14: redirect_to #event
15: end
16: end
[1] pry(#<EventsController>)>
[1] pry(#<EventsController>)> #event
=> #<Event:0x007f89f8013c98
id: 67,
name: "Rent a plane",
total_price: 3400,
created_at: Mon, 13 Mar 2017 01:18:24 UTC +00:00,
updated_at: Mon, 13 Mar 2017 01:18:24 UTC +00:00>
[2] pry(#<EventsController>)> #event.participants
Participant Load (0.2ms) SELECT "participants".* FROM "participants" WHERE "participants"."event_id" = $1 [["event_id", 67]]
=> [#<Participant:0x007f89f6773580
id: 30,
first_name: nil,
salary: nil,
created_at: Mon, 13 Mar 2017 01:18:24 UTC +00:00,
updated_at: Mon, 13 Mar 2017 01:18:24 UTC +00:00,
event_id: 67>]
If neeeded here are my models:
class Event < ApplicationRecord
has_many :participants, dependent: :destroy
accepts_nested_attributes_for :participants, reject_if: :all_blank, allow_destroy: true
end
class Participant < ApplicationRecord
belongs_to :event
end
And my forms:
new.html.erb
<%= simple_form_for #event do |f| %>
<%= f.input :name, label: "Event's name" %>
<%= f.input :total_price, label: "What is the total price" %>
<h2> Add your friends to share the bill</h2>
<%= f.simple_fields_for :participants do |participant| %>
<%= render "events/participants_fields", f: participant %>
<% end %>
<%= link_to_add_association 'add a friend', f, :participants, partial: "events/participants_fields", class:"btn btn-primary" %>
<%= f.button :submit %>
<% end %>
partial: _participants_fields.html.erb
<div class='nested-fields participant-background'>
<%= f.input :first_name, label: "Enter your friend's first name" %>
<%= f.input :salary, label: "Enter his/her monthly pay" %>
<%= link_to_remove_association "Remove this friend", f , class: "btn btn-danger btn-xs" %>
</div>
EDIT
These are my logs when I create an event with participants they aren't saved: ( I just kept the #event = Event.new(params_event)
tarted GET "/" for ::1 at 2017-03-13 13:55:20 +0100
ActiveRecord::SchemaMigration Load (7.0ms) SELECT "schema_migrations".* FROM "schema_migrations"
Processing by EventsController#new as HTML
User Load (0.6ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2 [["id", 1], ["LIMIT", 1]]
Rendering events/new.html.erb within layouts/application
Rendered events/_participants_fields.html.erb (5.8ms)
Rendered events/new.html.erb within layouts/application (98.6ms)
Rendered shared/_navbar.html.erb (2.5ms)
Rendered shared/_flashes.html.erb (0.4ms)
Completed 200 OK in 408ms (Views: 358.0ms | ActiveRecord: 20.9ms)
Started POST "/events" for ::1 at 2017-03-13 13:55:48 +0100
Processing by EventsController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"mMuWIZe06ofG6DCafY2EPrJouIcF4YzKKJx6Y9ct5XUZNHqIyvFY4l3dqiEnxC5NhQapvSnFDukgblJnHg+14g==", "event"=>{"name"=>"Rent a van", "total_price"=>"390"}, "commit"=>"Create Event"}
User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2 [["id", 1], ["LIMIT", 1]]
(0.1ms) BEGIN
SQL (11.9ms) INSERT INTO "events" ("name", "total_price", "created_at", "updated_at") VALUES ($1, $2, $3, $4) RETURNING "id" [["name", "Rent a van"], ["total_price", 390], ["created_at", 2017-03-13 12:55:48 UTC], ["updated_at", 2017-03-13 12:55:48 UTC]]
(6.0ms) COMMIT
(0.2ms) BEGIN
(0.2ms) COMMIT
Redirected to http://localhost:3000/events/93
Completed 302 Found in 25ms (ActiveRecord: 18.6ms)
Started GET "/events/93" for ::1 at 2017-03-13 13:55:48 +0100
Processing by EventsController#show as HTML
Parameters: {"id"=>"93"}
User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 ORDER BY "users"."id" ASC LIMIT $2 [["id", 1], ["LIMIT", 1]]
Event Load (0.4ms) SELECT "events".* FROM "events" WHERE "events"."id" = $1 LIMIT $2 [["id", 93], ["LIMIT", 1]]
Rendering events/show.html.erb within layouts/application
Participant Load (0.5ms) SELECT "participants".* FROM "participants" WHERE "participants"."event_id" = $1 [["event_id", 93]]
Rendered events/show.html.erb within layouts/application (3.1ms)
Rendered shared/_navbar.html.erb (3.3ms)
Rendered shared/_flashes.html.erb (0.8ms)
Completed 200 OK in 41ms (Views: 34.1ms | ActiveRecord: 1.5ms)

Answer 1

The problem was in my forms....
Cocoon needs special div
<div class="container">
<div class="col-xs-12">
<%= simple_form_for #event do |f| %>
<%= f.input :name, label: "Event's name" %>
<%= f.input :total_price, label: "What is the total price" %>
<h2> Add your friends to share the bill</h2>
<div id="participants">
<%= f.simple_fields_for :participants do |participant| %>
<%= render "events/participants_fields", f: participant %>
<% end %>
</div>
<div class="links">
<%= link_to_add_association 'add a friend', f, :participants, partial: "events/participants_fields", class:"btn btn-primary" %>
</div>
<%= f.button :submit %>
<% end %>
</div>
</div>
I cleaned the controller like so:
class EventsController < ApplicationController
def new
#event = Event.new
end
def create
#event = Event.new(params_event)
if #event.save
redirect_to event_path(#event)
end
end
def show
#event = Event.find(params[:id])
end
private
def params_event
params
.require(:event).permit(:name,:total_price, participants_attributes: [:first_name, :salary, :_destroy ] )
end
end