Update an array in document in mongoose

Question

The schema below:

const questionSchema = new Schema({
    askedBy: {
        type: String,
        required: true
    },
    title:{
        type:String,
        required: true
    },
    queryType: {
        type: String,
        required: true
    },
    question:{
        type: String,
        required:true
    },
    datePosted: String,
    isOpen: Boolean,
    answers:{
        type:Array
    }
})

The code below:

app.patch("/:id" , (req,res) =>{
        
       Question.findByIdAndUpdate(req.params.id, {answer:[req.body.answer]}, {new:true})
         .then((response) => res.json(response))
         .catch((err) => res.json(err));

    
} )

What I want to do is take the answer string that is coming from the body and use it to update the array. And the next time I do this I want that element to be appended to the array.

Answer 1

Try this:

Question.findByIdAndUpdate(req.params.id, {
   $push: {
       answer: req.body.answer
   }, {new:true})
.then((response) => res.json(response))
.catch((err) => res.json(err));