使用拆分的MongoDB虚拟架构

Question

为什么这不起作用???。

var mongoose = require('mongoose');

var schema = new mongoose.Schema({
  name: { type: String, required: true },
  courses: [{ type: String, ref: 'Course' }]
});

/* Returns the student's first name, which we will define
 * to be everything up to the first space in the student's name.
 * For instance, "William Bruce Bailey" -> "William" */
schema.virtual('firstName').get(function(name) {
    var split = name.split(' ');
  return split[0];
});

错误：TypeError：无法读取属性＆＃39; split＆＃39;未定义的

Answer 1

尝试在名称前添加“this”，以便您的代码看起来像这样

schema.virtual('firstName').get(function(name) {
  var split = this.name.split(' ');
  return split[0];
});