How to associate a subscriber to an event - ruby-on-rails

Question

I'm trying to make that a subscriber, sub to an certain event
with the following url per example:
http://localhost:3001/events/1/subscribers/new
but I don't know how to associate event_id when creating a new subscriber
for the moment i'm getting this error:
Couldn't find Event with 'id'=
in the routes:
resources :events do
resources :subscribers #url/events/:events_id/subscribers/new
end
resources :events
root 'events#index'
in the subscribers controller:
def show
end
# GET /subscribers/new
def new
#puts "Look for me in console\n"
#puts params.inspect
#event = Event.find(params[:events_id])
#subscriber = #event.Subscriber.new
end
# GET /subscribers/1/edit
def edit
end
# POST /subscribers
# POST /subscribers.json
def create
#event = Event.find(params[:order_id])
#subscriber = #event.Subscriber.new order_params
##subscriber = Subscriber.new(subscriber_params)
respond_to do |format|
if #subscriber.save
SubsMailer.new_subscriber(#subscriber).deliver
format.html { redirect_to #subscriber, notice: 'Subscriber was successfully created.' }
format.json { render :show, status: :created, location: #subscriber }
else
format.html { render :new }
format.json { render json: #subscriber.errors, status: :unprocessable_entity }
end
end
end
in the new.html.erb:
<h1>New Subscriber</h1>
<%= render 'form', subscriber: #subscriber %>
<%= link_to 'Back', subscribers_path %>
model association:
event.rb:
class Event < ApplicationRecord
has_many :subscribers, dependent: :destroy
end
subscriber.rb:
class Subscriber < ApplicationRecord
belongs_to :event
validates :email, presence: true,
format: /\A\S+#\S+\z/,
uniqueness: { case_sensitive: false }
end

Answer 1

Well, I think this documentation will help you to understand what you need to do.
If briefly at first you need to change your models. You could have many to many for Event -> Subscriber association or one to many. One to many is the simplest to show so you need to add this to your Subscriber model:
belongs_to :event
And this to your Event model:
has_many :subscribers
Add new migration:
def change
remove_column :subscribers, :events_id
remove_column :subscribers, 'Event_id'
add_column :subscribers, :event_id, :integer
end
Then in your controller, you should change method calls, as Subscriber is a class, not the method.
def new
#event = Event.find(params[:event_id])
#subscriber = #event.subscribers.build
end
And you should be sure that in your database you have Event with this id.
To check it you can try to debug your controller code:
def new
puts "Event ids: " + Event.all.map(&:id).inspect
#event = Event.find(params[:event_id])
#subscriber = #event.subscribers.build
end
In your logs you should have something like:
Event ids: [1]

Answer 2

I think you just have a typo in your new method. You call params[:eventS_id] when it should be params[:event_id]. Also you don't properly reference your association. it should be event.subscribers.new:
def new
#puts "Look for me in console\n"
#puts params.inspect
#event = Event.find(params[:event_id])
#subscriber = #event.subscribers.build
end
Migration:
def up
change_table :subscribers do |t|
t.remove :Event_id
t.references :event
end
end
def down
change_table :subscribers do |t|
t.remove :event_id
t.add :Event_id, :integer
end
end
Keep me posted whether this helps and if you have any additional issues