I'm trying to build a simple music upload/streaming web app with rails (5.1.4). I have installed the paperclip gem, added paperclip migration to my Tracks model with - $ rails g paperclip track audio
, which adds t.attachment :audio
to my tracks table, then ran all the necessary db:migrates. I then validated :audio
so my track.rb model now looks like this:
class Track < ApplicationRecord
belongs_to :user
belongs_to :genre
has_attached_file :audio
validates :audio, presence: true
validates_attachment_content_type :audio, :content_type => [
'audio/mpeg', 'audio/mp3' ]
end
Then in my _form.html.erb file for create new tracks I added the file_field tag, so now looks like so:
<%= simple_form_for @track do |f| %>
<%= f.input :title, label: "Track Name:" %>
<%= f.input :price %>
<%= f.file_field :audio %>
<%= select_tag(:genre_id, options_for_select(@genres), :prompt => "Select a Genre", class: "genre_select") %>
<%= f.input :description %>
<%= f.button :submit %>
<% end %>
The tracks/new still renders the form view correctly and allows me to input the data fields, however, when I click 'Create Track' I get a NoMethod Error that looks like this:
It seems to be disagreeing with the associated genres (another migration that I previously added to the tracks model)
Sorry for this insanely long-winded question, Im pretty new to rails so I couldn't better explain it.. any help would be massively appreciated.
Also.. here is what my tracks controller looks like for reference:
class TracksController < ApplicationController
before_action :find_track, only: [:show, :edit, :update, :destroy]
def index
if params[:genre].blank?
@tracks = Track.all.order("created_at DESC")
else
@genre_id = Genre.find_by(name: params[:genre]).id
@tracks = Track.where(:genre_id => @genre_id).order("created_at DESC")
end
end
def new
#associates the new path to current user
@track = current_user.tracks.build
#gets all existing genres from table with all existing params, similar to a loop thru
@genres = Genre.all.map{ |g| [g.name, g.id]}
end
def show
# first finds track by id (code is in private find_track method)
end
def create
#initialises the create for the current user
@track = current_user.tracks.build(track_params)
# associates and passes in the selected genre param (id) into tracks table
@track.genre_id = params[:genre_id]
if @track.save
redirect_to root_path
else
render 'new'
end
end # --- end CREATE
def edit
#gets all existing genres from table with all existing params, similar to a loop thru
@genres = Genre.all.map{ |g| [g.name, g.id]}
end
def update
if @track.update(track_params)
redirect_to track_path(@track)
else
render 'edit'
end
end
def destroy
@track.destroy
redirect_to root_path
end
private
def track_params
params.require(:track).permit(:title, :description, :artist, :genre_id, :price, :audio)
end
def find_track
@track = Track.find(params[:id])
end
end
Copy of rails c Genre.all
2.4.0 :002 > Genre.all
Genre Load (1.3ms) SELECT "genres".* FROM "genres" LIMIT ? [["LIMIT", 11]]
=> #<ActiveRecord::Relation [#<Genre id: 1, name: "Acoustic", created_at: "2017-09-11 12:53:37", updated_at: "2017-09-11 12:53:37">, #<Genre id: 2, name: "Electronic", created_at: "2017-09-11 12:54:02", updated_at: "2017-09-11 12:54:02">, #<Genre id: 3, name: "Rock", created_at: "2017-09-11 12:54:07", updated_at: "2017-09-11 12:54:07">, #<Genre id: 4, name: "Reggae", created_at: "2017-09-11 12:54:13", updated_at: "2017-09-11 12:54:13">, #<Genre id: 5, name: "Classical", created_at: "2017-09-11 12:54:19", updated_at: "2017-09-11 12:54:19">, #<Genre id: 6, name: "Piano", created_at: "2017-09-11 12:54:26", updated_at: "2017-09-11 12:54:26">, #<Genre id: 7, name: "Pop", created_at: "2017-09-11 12:54:29", updated_at: "2017-09-11 12:54:29">, #<Genre id: 8, name: "Theme", created_at: "2017-09-11 12:54:32", updated_at: "2017-09-11 12:54:32">, #<Genre id: 9, name: "Animation", created_at: "2017-09-11 12:54:36", updated_at: "2017-09-11 12:54:36">, #<Genre id: 10, name: "Country", created_at: "2017-09-11 12:54:55", updated_at: "2017-09-11 12:54:55">, ...]>
2.4.0 :003 >
I think you should try to render your partial like that in tracks/new.html.erb:
<%= render 'tracks/form.html.erb', genres: @genres, track: @track %>
And update your partial like that:
<%= simple_form_for track do |f| %>
<%= f.input :title, label: "Track Name:" %>
<%= f.input :price %>
<%= f.file_field :audio %>
<%= select_tag(:genre_id, options_for_select(genres), :prompt => "Select a Genre", class: "genre_select") %>
<%= f.input :description %>
<%= f.button :submit %>
<% end %>
Good luck.
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