Fix #5208: The posts version of create or update artist commentary endpoint does not work without the post ID parameter being passed in the body

Fix /posts/:post_id/artist_commentary/create_or_update not working
without passing `artist_commentary[post_id]` in the form body.

app/controllers/artist_commentaries_controller.rb

@@ -26,7 +26,7 @@ class ArtistCommentariesController < ApplicationController
   end
 
   def create_or_update
-    post_id = params[:artist_commentary].delete(:post_id)
+    post_id = params[:artist_commentary].delete(:post_id) || params[:post_id]
     @artist_commentary = authorize ArtistCommentary.find_or_initialize_by(post_id: post_id)
     @artist_commentary.update(permitted_attributes(@artist_commentary))
     respond_with(@artist_commentary)

app/views/artist_commentaries/_form.html.erb

@@ -10,9 +10,7 @@
   </div>
 </form>
 
-<%= edit_form_for(artist_commentary, url: create_or_update_artist_commentaries_path(format: :js), remote: true, method: :put, html: { id: "edit-commentary" }) do |f| %>
-  <%= f.input :post_id, as: :hidden, input_html: { value: post.id } %>
-
+<%= edit_form_for(artist_commentary, url: create_or_update_post_artist_commentary_path(post_id: post.id, format: :js), remote: true, method: :put, html: { id: "edit-commentary" }) do |f| %>
   <%= f.input :original_title, as: :string, input_html: { value: artist_commentary.try(:original_title) } %>
   <%= f.input :original_description, input_html: { value: artist_commentary.try(:original_description) } %>
 

test/functional/artist_commentaries_controller_test.rb

@@ -49,7 +49,7 @@ class ArtistCommentariesControllerTest < ActionDispatch::IntegrationTest
         params = {
           artist_commentary: {
             original_title: "foo",
-            post_id: FactoryBot.create(:post).id
+            post_id: create(:post).id
           },
           format: "js"
         }
@@ -74,6 +74,19 @@ class ArtistCommentariesControllerTest < ActionDispatch::IntegrationTest
         assert_response :success
         assert_equal("foo", @commentary.reload.original_title)
       end
+
+      should "work for /posts/:post_id/artist_commentary/create_or_update" do
+        params = {
+          post_id: create(:post).id,
+          artist_commentary: { original_title: "foo" },
+        }
+
+        assert_difference("ArtistCommentary.count", 1) do
+          put_auth create_or_update_post_artist_commentary_path(params), @user, xhr: true
+        end
+
+        assert_response :success
+      end
     end
 
     context "revert action" do