Append data from different model in json object - ruby-on-rails

Question

I am trying to implement Like function in my rails app.
What I do for now is I have model Question, Answer and Like.
Basically,
Question model has question details for example user_id, question_text, Answer model has answer details for example user_id, answer_text and Like model has relationship for like between user_id, question_id, and answer_id.
In my Question controller, I want to render Question details page, where it will shows us a question and few answers.
I have render the question json, and answers related to the question.
{
"questions": [
{
"id": 1,
"text": "Turtoise",
"user_id": 22
}
],
"answers": [
{
"id": 41,
"question_id": 1,
"user_id": 17,
"text": "Good"
},
{
"id": 7,
"question_id": 1,
"user_id": 17,
"text": "alifff"
}
],
"isLike": [
{
"id": 1,
"user_id": "17",
"question_id": "1",
"answer_id": null,
"isLike": false
}
]
}
Now I want to render the json like this
{
"questions": [
{
"id": 1,
"text": "Turtoise",
"isLike": {
"id": 1,
"user_id": "17",
"question_id": "1",
"answer_id": null,
"isLike": true
}
}
],
"answers": [
{
"id": 7,
"text": "Good",
"isLike": {
"id": 2,
"user_id": "17",
"question_id": null,
"answer_id": "8",
"isLike": false
}
},
{
"id": 8,
"text": "Nice",
"isLike": {
"id": 3,
"user_id": "17",
"question_id": null,
"answer_id": "8",
"isLike": false
}
}
]
}
Can you give me some idea how to do this.

Answer 1

You may need to play with rails relationship here.
General speaking, your Question hasMany Like, and Like belongsTo Question. Same goes to Answer, Answer hasMany Like, and Like belongsTo Answer.
Since Like can belongsTo more than one model, you can try using Polymorphism Association.
http://guides.rubyonrails.org/association_basics.html#polymorphic-associations