Replace finders

lib/api/group_labels.rb

@@ -35,7 +35,7 @@ module API
       post ':id/labels' do
         authorize! :admin_label, user_group
-        label = available_labels_for(user_group).find_by(title: params[:name])
+        label = available_labels_for(user_group, { title: params[:name] })
         conflict!('Label already exists') if label
         label = ::Labels::CreateService.new(declared_params(include_missing: false)).execute(group: user_group)
@@ -57,7 +57,7 @@ module API
       delete ':id/labels' do
         authorize! :admin_label, user_group
-        label = user_group.labels.find_by(title: params[:name])
+        label = available_labels_for(user_group, { title: params[:name] })
         not_found!('Label') unless label
         destroy_conditionally!(label)
@@ -77,7 +77,7 @@ module API
       put ':id/labels' do
         authorize! :admin_label, user_group
-        label = user_group.labels.find_by(title: params[:name])
+        label = available_labels_for(user_group, { title: params[:name] })
         not_found!('Label not found') unless label
         label = ::Labels::UpdateService.new(declared_params(include_missing: false)).execute(label)

lib/api/helpers.rb

@@ -84,8 +84,8 @@ module API
       page || not_found!('Wiki Page')
     end
-    def available_labels_for(label_parent)
-      search_params = { include_ancestor_groups: true }
+    def available_labels_for(label_parent, search_params = {})
+      search_params.merge(include_ancestor_groups: true)
       if label_parent.is_a?(Project)
         search_params[:project_id] = label_parent.id