Add quiz total questions metadata

framework/serializers/quizzes.js

@@ -15,7 +15,7 @@ module.exports = function (included = [], type, config) {
   }
 
   const options = {
-    attributes: ['title', 'description', 'image', 'duration', 'maxAttempts', 'startDate', 'endDate', 'user', 'questions', 'maxMarks'],
+    attributes: ['title', 'description', 'image', 'duration', 'maxAttempts', 'startDate', 'endDate', 'user', 'questions', 'maxMarks', 'totalQuestions'],
     meta: {
       pagination: function (record) {
         return record.pagination
@@ -36,4 +36,4 @@ module.exports = function (included = [], type, config) {
   }
 
   return options
-}
+}

routes/api/quiz/controller.js

@@ -165,6 +165,24 @@ class QuizController extends BaseController {
       group: ['quizzes.id']
     })
     quiz.maxMarks = result ? +result.get('total') : 0
+    await this.setTotalQuestions(quiz)
+  }
+
+  async onAfterGetQuery(req, rows) {
+    await Promise.all(rows.map(quiz => this.setTotalQuestions(quiz)))
+  }
+
+  async setTotalQuestions(quiz) {
+    if (Array.isArray(quiz.questions)) {
+      quiz.totalQuestions = quiz.questions.length
+      return
+    }
+
+    quiz.totalQuestions = await DB.quizQuestions.count({
+      where: {
+        quizId: quiz.id
+      }
+    })
   }
 
   async handleGetMaxMarks(req, res) {

tests/quizzes-serializer.test.js

@@ -0,0 +1,10 @@
+const assert = require('assert')
+const serializer = require('../framework/serializers/quizzes')
+
+const options = serializer([], 'serialize')
+
+assert(
+  options.attributes.includes('totalQuestions'),
+  'quiz serializer should expose totalQuestions so JSON:API emits total-questions'
+)
+