Updated label description to accept empty string

Removed unneeded lookup hack

app/models/label.rb

@@ -217,11 +217,15 @@ class Label < ApplicationRecord
   end
 
   def title=(value)
-    write_attribute(:title, sanitize_value(value)) if value.present?
+    super if value.blank?
+
+    write_attribute(:title, sanitize_value(value))
   end
 
   def description=(value)
-    write_attribute(:description, sanitize_value(value)) if value.present?
+    return super if value.blank?
+
+    write_attribute(:description, sanitize_value(value))
   end
 
   ##

lib/gitlab/import_export/group/object_builder.rb

@@ -13,21 +13,12 @@ module Gitlab
           super
 
           @group = @attributes['group']
-
-          update_description
         end
 
         private
 
         attr_reader :group
 
-        # Convert description empty string to nil
-        # due to existing object being saved with description: nil
-        # Which makes object lookup to fail since nil != ''
-        def update_description
-          attributes['description'] = nil if attributes['description'] == ''
-        end
-
         def where_clauses
           [
             where_clause_base,

spec/lib/gitlab/import_export/group/object_builder_spec.rb

@@ -51,16 +51,4 @@ RSpec.describe Gitlab::ImportExport::Group::ObjectBuilder do
       expect(milestone.persisted?).to be true
     end
   end
-
-  describe '#initialize' do
-    context 'when attributes contain description as empty string' do
-      let(:attributes) { base_attributes.merge('description' => '') }
-
-      it 'converts empty string to nil' do
-        builder = described_class.new(Label, attributes)
-
-        expect(builder.send(:attributes)).to include({ 'description' => nil })
-      end
-    end
-  end
 end

spec/models/label_spec.rb

@@ -104,6 +104,12 @@ RSpec.describe Label do
       label = described_class.new(description: '<b>foo & bar?</b>')
       expect(label.description).to eq('foo & bar?')
     end
+
+    it 'accepts an empty string' do
+      label = described_class.new(title: 'foo', description: 'bar')
+      label.update!(description: '')
+      expect(label.description).to eq('')
+    end
   end
 
   describe 'priorization' do