Rails 4: Create record from other controller

Question

I have 2 models, User and Queue. And I want to be able to add the @user.id to the queue table from within the users_controller.

My models are:

class Queue < ActiveRecord::Base
    has_many :users
end

class User < ActiveRecord::Base
    belongs_to :queue
end

and my function in users_controller is:

def addToQueue
    queue_entry = Queue.new(user_id: @user.id) # where things go wrong
    if queue_entry.save
        redirect_to user_path(@user), notice: "#{@user.name} has been successfully added to the queue."
    else
        redirect_to user_path(@user), :flash => {:error => "Error: #{@user.name} was NOT added to the queue."}
    end
end

I have a link for this function in the show.html.erb view for a user as: <%= link_to 'Add to queue', addToQueue_path(@user) %>

For some reason I keep getting: wrong number of arguments (1 for 0) pointing to the line queue_entry = Queue.new(user_id: @user.id)

How should I be doing this?

Answer 1

The way you set your relationship means that the users table has a foreign key queue_id and not the other way around.

Since an instance of a User belongs_to a Queue instance then queue_id has to be assigned as an attribute on the User instance.