如何将值添加到JSON数组（node.js / mongoose）

Question

I'm using mongoose, adding values from HTML and saving to db with help of mongoose. I'm having issue adding value from req.body.chapter into array from HTML.

Route:

  const newBook = {
      book: req.body.book,
      summary: req.body.summary,
      chapters: //how to add value into chapter-array?
    }

Book-model:

const BookSchema = new Schema({
 Title: {
    type: String,
    required: true
  },
  Summary: {
    type: String,
    required: true
  },
  chapters : [{
    chapter: {
      type: String,
      required: true
  }]   
});

HTML:

<div class="form-group">
      <label for="book">Title:</label>
      <input type="text" class="form-control" name="book" required>
</div>
<div class="form-group">
      <label for="Summary">Summary:</label>
      <input type="text" class="form-control" name="Summary" required>
</div>
<div class="form-group">
      <label for="chapter">chapter:</label>
      <input type="text" class="form-control" name="chapter" required>
</div>

Answer 1

So if the data looks like this, you can just put it in:

req.body.chapters = ["1", "3"];

Route:

const newBook = {
   book: req.body.book,
   summary: req.body.summary,
   chapters: req.body.chapters
 }

If you just want to add the chapters to existing data, then have a look at Using Mongoose / MongoDB $addToSet functionality on array of objects