Javascript Schema Object: The Building Block for Data Structures

As a novice coder, I am currently trying to decipher a piece of sample code from a Q&A application.

In the server-side code snippet, the Question object contains a property known as answers:

var Question = new Schema({
    title: {type:String, required: true, trim:true},
    answers: [Answer],
    });

Interestingly, although answers is only defined within the Question object, it is also referenced alongside var question in the subsequent for loop:

var question;
var answerController = Alloy.createController('answer');

exports.setQuestion = function(c, q){
      question = c.get('questions')[q];

for(var i = 0; i < question['answers'].length; i++){
        var answer = question['answers'][i],

This raises the question: if answers was initially declared within the context of the Question object, how is it being utilized with question here?

Answer №1

  • c.get('questions') retrieves an array consisting of Schema objects.
  • question = c.get('questions')[q];
    assigns the variable question to one of these Schema objects within the array.
  • Each Schema object includes two main properties: title (containing an object) and answers (holding an array of Answer objects).
  • Consequently, question now points to a Schema object, allowing access to its Answer array via question.answers or question['answers'].

The piece missing in your code is the section that invokes exports.setQuestion(). This segment needs to pass an object equipped with a get() method returning an array of Schemas. Unfortunately, details regarding its source remain unclear, forming part of a broader system designed to track all questions developed. Explaining isolated components without context proves challenging.

Your inquiries highlight potential misconceptions around variables, objects, and properties. It might be beneficial to revisit educational materials for a comprehensive grasp of these concepts.

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