context 'serialized field' do
      let(:model) do
        new_class do
          field :options, :serialized
        end
      end

      it 'returns true if serialized field has unsaved changes' do
        obj = model.new(options: {})
        expect(obj.changed?).to eq true

        obj = model.create(options: {})
        obj.options['name'] = 'Alex'
        expect(obj.changed?).to eq true
      end

      it 'returns true if serialized field has unsaved changes other object ' do
        obj = model.new(options: {})
        expect(obj.changed?).to eq true

        obj = model.create(options: {})
        obj.options = {'name' => 'Alex'}
        expect(obj.changed?).to eq true
      end
    end