Add cross project references support for label model

1 files changed, 20 insertions, 4 deletions

diff --git a/app/models/label.rb b/app/models/label.rb
index 02683a08dd6..445f22ee1e0 100644
--- a/app/models/label.rb
+++ b/app/models/label.rb
@@ -70,16 +70,20 @@ class Label < ActiveRecord::Base
   #
   #   Label.first.to_reference                # => "~1"
   #   Label.first.to_reference(format: :name) # => "~\"bug\""
+  #   Label.first.to_reference(project)       # => "gitlab-org/gitlab-ce~1"
   #
   # Returns a String
-  def to_reference(_from_project = nil, format: :id)
-    if format == :name && !name.include?('"')
-      %(#{self.class.reference_prefix}"#{name}")
+  def to_reference(from_project = nil, format: :id)
+    reference = label_format_reference(format)
+
+    if cross_project_reference?(from_project)
+      project.to_reference + reference
     else
-      "#{self.class.reference_prefix}#{id}"
+      reference
     end
   end
 
+
   def open_issues_count
     issues.opened.count
   end
@@ -95,4 +99,16 @@ class Label < ActiveRecord::Base
   def template?
     template
   end
+
+  private
+
+  def label_format_reference(format = :id)
+    raise StandardError, 'Unknown format' unless [:id, :name].include?(format)
+
+    if format == :name && !name.include?('"')
+      %(#{self.class.reference_prefix}"#{name}")
+    else
+      "#{self.class.reference_prefix}#{id}"
+    end
+  end
 end