Use ILIKE/LIKE for searching groups

app/models/group.rb

@@ -33,8 +33,18 @@ class Group < Namespace
   after_destroy :post_destroy_hook
 
   class << self
+    # Searches for groups matching the given query.
+    #
+    # This method uses ILIKE on PostgreSQL and LIKE on MySQL.
+    #
+    # query - The search query as a String
+    #
+    # Returns an ActiveRecord::Relation.
     def search(query)
-      where("LOWER(namespaces.name) LIKE :query or LOWER(namespaces.path) LIKE :query", query: "%#{query.downcase}%")
+      table   = Group.arel_table
+      pattern = "%#{query}%"
+
+      where(table[:name].matches(pattern).or(table[:path].matches(pattern)))
     end
 
     def sort(method)

spec/models/group_spec.rb

@@ -103,4 +103,30 @@ describe Group, models: true do
       expect(group.avatar_type).to eq(["only images allowed"])
     end
   end
+
+  describe '.search' do
+    it 'returns groups with a matching name' do
+      expect(described_class.search(group.name)).to eq([group])
+    end
+
+    it 'returns groups with a partially matching name' do
+      expect(described_class.search(group.name[0..2])).to eq([group])
+    end
+
+    it 'returns groups with a matching name regardless of the casing' do
+      expect(described_class.search(group.name.upcase)).to eq([group])
+    end
+
+    it 'returns groups with a matching path' do
+      expect(described_class.search(group.path)).to eq([group])
+    end
+
+    it 'returns groups with a partially matching path' do
+      expect(described_class.search(group.path[0..2])).to eq([group])
+    end
+
+    it 'returns groups with a matching path regardless of the casing' do
+      expect(described_class.search(group.path.upcase)).to eq([group])
+    end
+  end
 end