How to store an array with Mongoose + Express.js?

Question

I'm new on MongoDB and I wanted to store an array.

Here's an example of what I want

question : {
    question : "My question",
    answer   : "My answer",
    subQuestions : 
    [0] {
        question: "My sub question",
        answer  : "My sub answer"
    },
    [1] {
        question: "My other sub question", 
        answer  : "My other sub answer"
    }
}

But I didn't succeed to put multiple entries in subQuestions. I got this instead :

question : {
    question : "My question",
    answer   : "My answer",
    subQuestions : {
        question {
            [0] : "My sub question",
            [1] : "My other sub question"
        },
        answer {
            [0] : "My sub answer",
            [1] : "My other sub answer"
        }
    }
}

What I have actually is hard to process in front and I really wanted to have what I've showed in the first bloc.

This is my actual Schema :

var Questions = new Schema({
    question: { type: String },
    answer  : { type: String },
    subQuestions : {
        question : [String],
        answer   : [String]
    }
});

And my saving script :

var q = new Questions;
q.subQuestions.question = ["My sub question", "My other sub question"];
q.subQuestions.answer   = ["My sub answer", "My other sub answer"];

q.save(function(err){
    console.log(err);
});

Can someone help me with this ? I'm on it from awhile so maybe it's just a little thing that I didn't think about.

Thank you very much in advance and don't hesitate to ask me questions.

Thanks for helping. My actual mongoose Schema look like the third block code on my question. — Zachary Dahan
– Zachary Dahan, Commented Apr 10, 2015 at 22:11

Community · Accepted Answer · 2017-05-23 11:57:04Z

3

You just have to define an array in your schema:

var Questions = new Schema({
    question: { type: String },
    answer  : { type: String },
    subQuestions : [{
        question : String,
        answer   : String
    }]
});

Note that I changed your curly braces.

To add a new subquestion you can use push():

q = new Questions
sq.question = "How are you doing?"
sq.answer = "Great."
q.subQuestions.push(sq)

I didn't test this code but it first assembles a JavaScript object from two strings (this is the sq object) and then pushes it to the array.

edited May 23, 2017 at 11:57

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answered Apr 10, 2015 at 22:16

Max

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