我如何在猫鼬中设计一个 json 结果？

Question

我的目标很简单，我想把这个特定的 json 结果设计成 mongoose 数据结构。

Json 示例

{  
         "question": "Who was the 13th president of the United States?",
         "choice_1": "Millard Fillmore",
         "choice_2": "Zachary Taylor",
         "choice_3": "Franklin Pierce",
         "choice_4" :"James K. Polk",
         "answer" :"choice_1"
      },

我的目标是将这个 json 设计转换为猫鼬设计，以及我迄今为止的尝试。

const mongoose = require('mongoose');
const Schema = mongoose.Schema;

const QuestionSchema = new Schema({
    question: String,
    choice_1: String,
    choice_2: String,
    choice_3: String,
    choice_4: String,
    answer: String
});

那么稍后，在创建问题的过程中，如何将其中一个选项分配给 answer 属性？

const Question = require('/question');

const question = new Question();
question.question = req.body.question;
question.choice_1 = req.body.choice_1;
question.choice_2 = req.body.choice_2;
question.choice_3 = req.body.choice_3;
question.choice_4 = req.body.choice_4;
question.answer = // how do i put choice 1 - 3 here?

Answer 1

您的示例通过其属性名称引用答案，因此：

question.answer = 'choice_3';

稍后，在运行查询以检索问题后，您可以使用 .answer 的值将其转换回实际文本（用于显示目的）：

let answer = question[question.answer];