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Java Spring Boot | Adding additional data to response model

 
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Posts: 34
Python Angular Framework Java
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Hi,

I am building an endpoint that fetches Quizzes object list.

The Quiz model looks like this:





And here is an example of the endpoint response:

[
   {
       "createdAt": "2019-08-17T12:00:43.522+0000",
       "updatedAt": "2019-08-17T12:00:43.522+0000",
       "id": "bf013209-9e00-4890-8c74-a40298b51e12",
       "title": "quiz v",
       "description": "This quiz is called quiz v and it is just an example, this text should be the description of the quiz",
       "imageUrl": "https://images.immediate.co.uk/production/volatile/sites/3/2018/04/Screen-Shot-2018-04-05-at-09.20.50-96984e5.png",
       "isPublic": true,
       "assignedUsers": null,
       "creatorId": "620a1b29-94f3-4f55-b55c-51b173d35113",
       "answers": [
           {
               "createdAt": "2019-08-17T12:00:43.522+0000",
               "updatedAt": "2019-08-17T12:00:43.522+0000",
               "id": "69d3ed74-4382-44f4-b874-f9fc9c2f2181",
               "content": "answer x",
               "isCorrect": true,
               "userAnswers": [
                   {
                       "createdAt": "2019-08-17T12:02:31.070+0000",
                       "updatedAt": "2019-08-17T12:02:31.070+0000",
                       "id": "2e749bff-08a8-4f20-8709-7bf3a76cbafe"
                   }
               ]
           }
       ],
       "userAnswers": [
           {
               "createdAt": "2019-08-17T12:02:31.070+0000",
               "updatedAt": "2019-08-17T12:02:31.070+0000",
               "id": "2e749bff-08a8-4f20-8709-7bf3a76cbafe"
           }
       ]
   },
   {
       "createdAt": "2019-08-17T12:00:43.514+0000",
       "updatedAt": "2019-08-17T12:00:43.514+0000",
       "id": "a2c8e185-2bd2-4f2a-b6b5-f5f6139b377d",
       "title": "quiz o",
       "description": "This quiz is called quiz o and it is just an example, this text should be the description of the quiz",
       "imageUrl": "https://images.immediate.co.uk/production/volatile/sites/3/2018/04/Screen-Shot-2018-04-05-at-09.20.50-96984e5.png",
       "isPublic": true,
       "assignedUsers": null,
       "creatorId": "620a1b29-94f3-4f55-b55c-51b173d35113",
       "answers": [
           {
               "createdAt": "2019-08-17T12:00:43.514+0000",
               "updatedAt": "2019-08-17T12:00:43.514+0000",
               "id": "53a398f7-f4ec-48e7-9551-54f2b6f90159",
               "content": "answer x",
               "isCorrect": true,
               "userAnswers": []
           }
       ],
       "userAnswers": []
   }
]




I want to have the ability to add additional information in each item of the response array,
for example, i want to add the "number-of-correct-answers" for each quiz object

But without adding an attribute to the "Quiz" class because it represents the table on DB


How can I achieve this?

My goal is to be able to have an additional information in the JSON response without altering my table


Thanks in advance,
Redan


 
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