Case-insensetive search for comments

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

CHANGELOG

@@ -5,6 +5,7 @@ v 8.0.0 (unreleased)
   - Better performance for web editor (switched from satellites to rugged)
   - Faster merge
   - Ability to fetch merge requests from refs/merge-requests/:id
+  - Search for comments should be case insensetive
 
 v 7.14.0 (unreleased)
   - Update default robots.txt rules to disallow crawling of irrelevant pages (Ben Bodenmiller)

app/models/note.rb

@@ -90,7 +90,7 @@ class Note < ActiveRecord::Base
     end
 
     def search(query)
-      where("note like :query", query: "%#{query}%")
+      where("LOWER(note) like :query", query: "%#{query.downcase}%")
     end
   end
 

spec/models/note_spec.rb

@@ -198,4 +198,10 @@ describe Note do
     let(:backref_text) { issue.gfm_reference }
     let(:set_mentionable_text) { ->(txt) { subject.note = txt } }
   end
+
+  describe :search do
+    let!(:note) { create(:note, note: "WoW") }
+
+    it { expect(Note.search('wow')).to include(note) }
+  end
 end