Tips for building a MongoDB document that includes both objects and arrays, along with the corresponding schema in Mongoose

Need assistance with saving data in a mongodb database such as the following:

{
    name: "Just a name",
    questions: [
        {
            question: "Question 1",
            answerOptions: [
                {id: 0, text: "answer 1"},
                {id: 1, text: "answer 2"},
                {id: 2, text: "answer 3"}
            ],
            correctOptions: [ 0, 2 ]
        },
        {
            question: "Question 2",
            correctAnswers: [ "answer", "another answer" ]
        }
    ]
}

  1. Wondering if it's best to save all data in one collection or should consider decomposing and storing in separate related collections (main, answers, answeroptions, etc)?

  2. If possible to consolidate in one collection, how would a Mongoose schema be structured? Specifically, describing objects and arrays of objects as fields in the Mongoose schema.

Thanks for any guidance!

javascriptmongodbmongoose

Answer №1

1. Indeed, considering your specific use case, it is feasible to store data in a single collection without any hierarchical structure. Keep in mind that MongoDB does not support joins, so you will need to manage this within your application logic.

2. Below is the schema I am currently utilizing for my project. The document includes various field types such as arrays of objects:

var mongoose = require('mongoose');

var fieldFive = new mongoose.Schema({
    someField1: String,
    _id:false
});


var someArrayObject = new mongoose.Schema({
    someField1: String,
    someField2: String,
    someField3: false
});


var SampleSchema = new mongoose.Schema({
  fieldOne: {type:String, required: true},
  fieldTwo: String,
  fieldThree: [someArrayObject],
  fieldFour: {someOtherField1:[String], someOtherField2:[String], someOtherField3:[String]},
  fieldFive: {type:{}, ref:fieldFive},
  createdAt: {type: Date},
  updatedAt: {type: Date, default: Date.now},

});

module.exports = SampleSchema;

Hopefully, this information proves beneficial for your project requirements.

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