console.log 会调用 mongoose 文档的 toObject 方法？

Question

const mongoose = require('mongoose')mongoose.connect('mongodb://localhost/test')const A = mongoose.model('A', new mongoose.Schema({name: String}))A.create({name: 'aaa'}, (err, doc) => {  console.log(doc) // { _id: 5ae424bdcc21a02b700f9342, name: 'aaa', __v: 0 }  doc.toObject = o => 0  console.log(doc) // 0})// ------------------------------------A.create({name: 'aaa'}, (err, doc) => {  console.log(doc) // { _id: 5ae42509ae09661d681416f8, name: 'aaa', __v: 0 }  doc.toObject = 0  console.log(doc) // 报错: TypeError: this.toObject is not a function})

Answer 1

是调用了toString。

Document.prototype.inspect = function(options) {

  var isPOJO = options &&

    utils.getFunctionName(options.constructor) === 'Object';

  var opts;

  if (isPOJO) {

    opts = options;

    opts.minimize = false;

  }

  return this.toObject(opts);

};

/**

 * Helper for console.log

 *

 * @api public

 * @method toString

 * @memberOf Document

 */

Document.prototype.toString = function() {

  return inspect(this.inspect());

};