CODEWITHSUNDEEP
ruby-on-rails
marie
marie

Reputation: 231

How to suscribe a user to an event

I have a User and a Event model

When the user is on an event page, I would like that he could click a button to say 'Count me in'. Then I could have the list of all participants in that even.

What kind of form I am supposed to write? Do I need another table between ? 

<%= form_tag concert_path(@concert) do %>
 <%= hidden_field_tag :user_id, current_user.id %>
 <%= submit_tag "count me in", class:  "btn btn-primary
<% end %>

EDIT

I added the suggested code, but I am facing a no routes matches POST register So I added method: :put

<%= form_tag register_concert_path(@concert), method: :put do %>
  <%= hidden_field_tag :user_id, current_user.id %>
  <%= submit_tag "count me in", class:  "btn btn-primary" %>
<% end %>

Now I can add myself to a concert, but something wierd happens, it tries tp downlad a file register and says Failed - can't find file

Also How I am supposed to remove the user from the concert? Shall i go for a method unsubscribe and remove the current user from the list? 

def unsubscribe
  concert = Concert.find(params[:id])
  user = User.find(params[:user_id])
  concert.users.delete(user)
end

Upvotes: 2

Views: 36

Answers (1)

mmsilviu
mmsilviu

Reputation: 1451

What you are looking for is: has_and_belongs_to_many You need to define the link between concerts and users. 

class Concert 
 has_and_belongs_to_many :users
end

class User
 has_and_belongs_to_many :concerts
end

Then in the controller, please use other action(register), you have to add the user to current concert.

def register
  concert = Concert.find(params[id])
  user = User.find(params[user_id])
  concert.users << user # adding the user 
  concert.save
end

see the association reference

routes.rb

resources :concerts do
  member do
    put 'register'
  end
end

and the view

<%= form_tag register_concert_path(@concert) do %>
 <%= hidden_field_tag :user_id, current_user.id %>
 <%= submit_tag "count me in", class:  "btn btn-primary
<% end %>

Upvotes: 2

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