refactor: return boolean 'live' instead of response_count

app/serializers/api/questionnaire_serializer.rb

@@ -7,10 +7,10 @@ class QuestionnaireSerializer < ActiveModel::Serializer
                :key,
                :name,
                :content,
-               :response_count
+               :live
 
-    def response_count
-      object.responses.count
+    def live
+      object.responses.count.positive?
     end
   end
 end

spec/serializers/api/questionnaire_serializer_spec.rb

@@ -10,25 +10,25 @@
   describe 'renders the correct json' do
     it 'contains the correct variables' do
       expect(json).not_to be_nil
-      expect(json.keys).to eq(%w[title key name content response_count])
+      expect(json.keys).to eq(%w[title key name content live])
       expect(json[:title]).to eq questionnaire.title
       expect(json[:key]).to eq questionnaire.key
       expect(json[:name]).to eq questionnaire.name
       expect(json[:content].as_json).to eq questionnaire.content.as_json
     end
 
-    describe 'response_count' do
+    describe 'live' do
       context 'when the questionnaire has no responses' do
-        it 'returns 0' do
-          expect(json['response_count']).to eq 0
+        it 'returns false' do
+          expect(json['live']).to be_falsey
         end
       end
 
       context 'when the questionnaire has responses' do
         let(:measurement) { FactoryBot.create :measurement, questionnaire: questionnaire }
         let!(:response) { FactoryBot.create_list :response, 2, measurement: measurement }
-        it 'returns the correct number of responses' do
-          expect(json['response_count']).to eq 2
+        it 'returns true' do
+          expect(json['live']).to be_truthy
         end
       end
     end