Add parents method to Namespace

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/models/namespace.rb

@@ -163,11 +163,26 @@ class Namespace < ActiveRecord::Base
   end
 
   def full_name
-    if parent
-      parent.full_name + ' / ' + name
-    else
-      name
-    end
+    @full_name ||=
+      if parent
+        parent.full_name + ' / ' + name
+      else
+        name
+      end
+  end
+
+  def parents
+    @parents ||=
+      begin
+        parents = []
+
+        if parent
+          parents << parent
+          parents += parent.parents
+        end
+
+        parents
+      end
   end
 
   private

spec/models/namespace_spec.rb

@@ -132,4 +132,12 @@ describe Namespace, models: true do
     it { expect(group.full_path).to eq(group.path) }
     it { expect(nested_group.full_path).to eq("#{group.path}/#{nested_group.path}") }
   end
+
+  describe '#parents' do
+    let(:group) { create(:group) }
+    let(:nested_group) { create(:group, parent: group) }
+    let(:deep_nested_group) { create(:group, parent: nested_group) }
+
+    it { expect(deep_nested_group.parents).to eq([nested_group, group]) }
+  end
 end