Wrote AR methods using associations

app/models/artist.rb

@@ -4,13 +4,16 @@ class Artist < ActiveRecord::Base
 
   def get_genre_of_first_song
     #return the genre of the artist's first saved song
+    self.songs.first.genre
   end
 
   def song_count
     #return the number of songs associated with the artist
+    self.songs.count
   end
 
   def genre_count
     #return the number of genres associated with the artist
+    self.genres.count
   end
 end

app/models/genre.rb

@@ -4,13 +4,16 @@ class Genre < ActiveRecord::Base
 
   def song_count
     # return the number of songs in a genre
+    self.songs.count
   end
 
   def artist_count
     # return the number of artists associated with the genre
+    self.artists.count
   end
 
   def all_artist_names
     # return an array of strings containing every musician's name
+    self.artists.map{|artist| artist.name}
   end
 end

app/models/song.rb

@@ -3,9 +3,12 @@ class Song < ActiveRecord::Base
   belongs_to :genre
 
   def get_genre_name
+    self.genre.name
   end
 
   def drake_made_this
     # when this method is called it should assign the song's artist to Drake
+    self.artist = Artist.new({"name" => "Drake"})
   end
-end
+
+end

db/schema.rb

@@ -0,0 +1,30 @@
+# encoding: UTF-8
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# Note that this schema.rb definition is the authoritative source for your
+# database schema. If you need to create the application database on another
+# system, you should be using db:schema:load, not running all the migrations
+# from scratch. The latter is a flawed and unsustainable approach (the more migrations
+# you'll amass, the slower it'll run and the greater likelihood for issues).
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema.define(version: 5) do
+
+  create_table "artists", force: :cascade do |t|
+    t.string "name"
+  end
+
+  create_table "genres", force: :cascade do |t|
+    t.string "name"
+  end
+
+  create_table "songs", force: :cascade do |t|
+    t.string  "name"
+    t.integer "artist_id"
+    t.integer "genre_id"
+  end
+
+end