Devise + Polymorphic association questions - ruby-on-rails

Question

I'm fairly new to Rails, and having an issue understanding where I'm missing something.
I'm using Rails 4, Devise and I have a main User model that holds just password, email, and user_name that are common fields to my additional models: Artist, Fan.
I have the relationships set up as so:
class User < ActiveRecord::Base
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable,
:recoverable, :rememberable, :trackable, :validatable
belongs_to :account, polymorphic: true
validates_uniqueness_of :user_name
end
class Artist < ActiveRecord::Base
has_one :user, as: :account, dependent: :destroy
has_many :tracks, dependent: :destroy
accepts_nested_attributes_for :user
end
class Fan < ActiveRecord::Base
has_one :user, as: :account, dependent: :destroy
accepts_nested_attributes_for :user
end
And there is also one model that belongs_to Artist:
class Track < ActiveRecord::Base
belongs_to :artist
end
I have managed to get the polymorphic connections working, creating an Artist and it's user on creation. Now I am trying to create the Artist/Track connection.Currently I'm a getting it to
create the new Song, but it's not making the association on create. I'm getting a Track with no associated Artist_id = nil
My Song Controller looks something like this:
class TracksController < ApplicationController
before_action :authenticate_user!, :except => [:index, :show]
before_action :set_track, only: [:show, :edit, :update, :destroy]
def new
#track = Track.new
#track.build_artist
end
def create
#track = Track.new(track_params)
if #track.save
flash[:notice] = "Track was successfully created."
redirect_to #artist
else
redirect_to new_artist_track_path
end
end
Also... after successful create redirect_to #artist gives me an ActionControllerError of
"Cannot redirect to nil!
Any help would be appreciated
Edit: solved the redirect_to issue with changing redirect_to #artist to
redirect_to artist_path(current_user)
Still can't figure out how to save the association with Artist in Track on create
Edit #2: Here is my track_params
def track_params
params.require(:track).permit(:track_title, :description, :track_type)
end
Edit #3:
Here's the form:
<%= bootstrap_form_for #track, :html => { :multipart => true } do |f| %>
<div class="field">
<%= f.label :track_title %><br>
<%= f.text_field :track_title %>
</div>
<div class="field">
<%= f.label :description %><br>
<%= f.text_field :description %>
</div>
<div class="field">
<%= f.label :track_type %><br>
<%= f.text_field :track_type %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
And the following is the log after create:
Started POST "/tracks" for 127.0.0.1 at 2014-07-10 00:03:08 -0600
Processing by TracksController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"TzzOJrRmCzAcqdJcm+X5vSfKoHiL36T/yqUsdrpP+Ew=",
"track"=>{"track_title"=>"Track", "description"=>"Test track ", "track_type"=>"Demo"}, "commit"=>"Create Track"}
User Load (0.2ms) SELECT "users".* FROM "users" WHERE "users"."id" = 1 ORDER BY "users"."id" ASC LIMIT 1 (0.0ms) begin transaction SQL (261.5ms) INSERT INTO "tracks" ("created_at", "description", "track_title", "track_type", "updated_at") VALUES (?, ?, ?, ?, ?) [["created_at", "2014-07-10 06:03:08.377238"], ["description", "Test track "], ["track_title", "Track"], ["track_type", "Demo"], ["updated_at", "2014-07-10 06:03:08.377238"]] (45.2ms) commit transaction
Redirected to http://localhost:3000/artists/1
Completed 302 Found in 312ms (ActiveRecord: 306.9ms)

Answer 1

The #artist member variable is only available on each request, so the instance that you created in the new request is not available in the create request, well technically its nil. And you don't redirect to the record, but to a route.
Assuming you have the parameters set up correctly, and the association is being made in create, you could redirect to artist_path(#track.artist) but would need to see your routes.rb file to be sure

Answer 2

You can set the artist to the current user in the controller after the create
def create
#track = Track.new(track_params)
if #track.save
self.update_attributes(artist: current_user)
flash[:notice] = "Track was successfully created."
redirect_to artist_path(#track.artist)
else
redirect_to new_artist_track_path
end
end