Fix snippet update error message

app/controllers/concerns/snippets_actions.rb

@@ -30,9 +30,9 @@ module SnippetsActions
   end
 
   def check_repository_error
-    repository_error = snippet.errors.delete(:repository)
+    repository_errors = Array(snippet.errors.delete(:repository))
 
-    flash.now[:alert] = repository_error if repository_error
-    recaptcha_check_with_fallback(repository_error.nil?) { render :edit }
+    flash.now[:alert] = repository_errors.first if repository_errors.present?
+    recaptcha_check_with_fallback(repository_errors.empty?) { render :edit }
   end
 end

changelogs/unreleased/fj-fix-snippet-update-error-message.yml

+---
+title: Fix bug displaying snippet update error
+merge_request: 27082
+author:
+type: fixed

spec/features/projects/snippets/user_updates_snippet_spec.rb

@@ -38,7 +38,7 @@ describe 'Projects > Snippets > User updates a snippet' do
     end
 
     it 'renders edit page and displays the error' do
-      expect(page).to have_content('Error updating the snippet')
+      expect(page.find('.flash-container span').text).to eq('Error updating the snippet')
       expect(page).to have_content('Edit Snippet')
     end
   end

spec/features/snippets/user_edits_snippet_spec.rb

@@ -71,7 +71,7 @@ describe 'User edits snippet', :js do
     end
 
     it 'renders edit page and displays the error' do
-      expect(page).to have_content('Error updating the snippet')
+      expect(page.find('.flash-container span').text).to eq('Error updating the snippet')
       expect(page).to have_content('Edit Snippet')
     end
   end