potential fix for #3727

app/models/artist_url.rb

@@ -2,7 +2,7 @@ class ArtistUrl < ApplicationRecord
   before_validation :parse_prefix
   before_save :initialize_normalized_url, on: [ :create ]
   before_save :normalize
-  validates :url, presence: true, uniqueness: true
+  validates :url, presence: true, uniqueness: { scope: :artist_id }
   validate :validate_url_format
   belongs_to :artist, :touch => true
 

test/functional/artists_controller_test.rb

@@ -4,7 +4,6 @@ class ArtistsControllerTest < ActionDispatch::IntegrationTest
   def assert_artist_found(expected_artist, source_url = nil)
     if source_url
       get_auth finder_artists_path(format: "json", url: source_url), @user
-      puts response.body
       if response.body =~ /Net::OpenTimeout/
         skip "Remote connection to #{source_url} failed"
         return
@@ -134,7 +133,7 @@ class ArtistsControllerTest < ActionDispatch::IntegrationTest
     context "with an artist that has notes" do
       setup do
         as(@admin) do
-          @artist = create(:artist, name: "aaa", notes: "testing")
+          @artist = create(:artist, name: "aaa", notes: "testing", url_string: "htttp://example.com")
         end
         @wiki_page = @artist.wiki_page
         @another_user = create(:user)
@@ -143,7 +142,7 @@ class ArtistsControllerTest < ActionDispatch::IntegrationTest
       should "update an artist" do
         old_timestamp = @wiki_page.updated_at
         travel_to(1.minute.from_now) do
-          put_auth artist_path(@artist.id), @user, params: {artist: {notes: "rex"}}
+          put_auth artist_path(@artist.id), @user, params: {artist: {notes: "rex", url_string: "http://example.com\nhttp://monet.com"}}
         end
         @artist.reload
         @wiki_page = @artist.wiki_page