Question

such as
var PersonSchame = new mongoose.Schema({

name: String,
 books: [{
 type：String
 }]

});

How to add data to books at this time?

Some basic questions:)

Answer 1

Do you mean to add an element to the books field of a piece of data in the database? If so, refer to the following example:

db.personModel.update({
 _id: xxx // A specific piece of data was found
 }, {
 $push:{
 members: username
 }
 }, (err) => {
 //callback function after //update operation
 });