Reuse LabelsFinder on Issueable#add_labels_by_names

app/models/concerns/issuable.rb

@@ -234,19 +234,13 @@ module Issuable
     labels.delete_all
   end
 
-  def add_labels_by_names(label_names)
-    label_ids = []
-    label_ids << project.group.labels.select(:id) if project.group.present?
-    label_ids << project.labels.select(:id)
-
-    union = Gitlab::SQL::Union.new(label_ids)
-
-    available_labels = Label.where("labels.id IN (#{union.to_sql})")
+  def add_labels_by_names(label_names, current_user)
+    available_labels = LabelsFinder.new(current_user, project_id: project.id).execute
 
     label_names.each do |label_name|
       title = label_name.strip
       label = available_labels.find_by(title: title)
-      label = project.labels.build(title: title, color: Label::DEFAULT_COLOR) if label.nil?
+      label ||= project.labels.build(title: title, color: Label::DEFAULT_COLOR)
 
       self.labels << label
     end

lib/api/merge_requests.rb

@@ -91,7 +91,7 @@ module API
         if merge_request.valid?
           # Find or create labels and attach to issue
           if params[:labels].present?
-            merge_request.add_labels_by_names(params[:labels].split(","))
+            merge_request.add_labels_by_names(params[:labels].split(","), current_user)
           end
 
           present merge_request, with: Entities::MergeRequest, current_user: current_user
@@ -201,7 +201,7 @@ module API
             # Find or create labels and attach to issue
             unless params[:labels].nil?
               merge_request.remove_labels
-              merge_request.add_labels_by_names(params[:labels].split(","))
+              merge_request.add_labels_by_names(params[:labels].split(","), current_user)
             end
 
             present merge_request, with: Entities::MergeRequest, current_user: current_user

lib/gitlab/fogbugz_import/importer.rb

@@ -129,7 +129,7 @@ module Gitlab
             assignee_id:  assignee_id,
             state:        bug['fOpen'] == 'true' ? 'opened' : 'closed'
           )
-          issue.add_labels_by_names(labels)
+          issue.add_labels_by_names(labels, project.creator)
 
           if issue.iid != bug['ixBug']
             issue.update_attribute(:iid, bug['ixBug'])

lib/gitlab/google_code_import/importer.rb

@@ -100,7 +100,7 @@ module Gitlab
             state:        raw_issue["state"] == "closed" ? "closed" : "opened"
           )
 
-          issue.add_labels_by_names(labels)
+          issue.add_labels_by_names(labels, project.creator)
 
           if issue.iid != raw_issue["id"]
             issue.update_attribute(:iid, raw_issue["id"])

spec/lib/gitlab/google_code_import/importer_spec.rb

@@ -15,6 +15,7 @@ describe Gitlab::GoogleCodeImport::Importer, lib: true do
   subject { described_class.new(project) }
 
   before do
+    project.team << [project.creator, :master]
     project.create_import_data(data: import_data)
   end