Add #to_ability_name to Project & Milestone

This will be used later for search filtering.

app/models/milestone.rb

@@ -254,6 +254,10 @@ class Milestone < ApplicationRecord
     group || project
   end
+  def to_ability_name
+    model_name.singular
+  end
+
   def group_milestone?
     group_id.present?
   end

app/models/project.rb

@@ -1223,6 +1223,10 @@ class Project < ApplicationRecord
     end
   end
+  def to_ability_name
+    model_name.singular
+  end
+
   # rubocop: disable CodeReuse/ServiceClass
   def execute_hooks(data, hooks_scope = :push_hooks)
     run_after_commit_or_now do

spec/models/milestone_spec.rb

@@ -206,6 +206,14 @@ describe Milestone do
     end
   end
+  describe '#to_ability_name' do
+    it 'returns milestone' do
+      milestone = build(:milestone)
+
+      expect(milestone.to_ability_name).to eq('milestone')
+    end
+  end
+
   describe '.search' do
     let(:milestone) { create(:milestone, title: 'foo', description: 'bar') }

spec/models/project_spec.rb

@@ -4334,6 +4334,14 @@ describe Project do
     end
   end
+  describe '#to_ability_name' do
+    it 'returns project' do
+      project = build(:project_empty_repo)
+
+      expect(project.to_ability_name).to eq('project')
+    end
+  end
+
   describe '#execute_hooks' do
     let(:data) { { ref: 'refs/heads/master', data: 'data' } }
     it 'executes active projects hooks with the specified scope' do