Express：在控制器中使用异步等待的问题

Question

const Employee = require('../models/employee');

const employeeCtrl = {};

employeeCtrl.getEmployees = async (req, res) => {
  const employees = await Employee.find();
  res.json(employees);
}

employeeCtrl.createEmployee = async (req,res) => {
  const employee = new Employee(req.body)
  console.log(employee);
  await employee.save();
  res.json('recivied');
}

employeeCtrl.getEmployee = function() {

}

employeeCtrl.editEmployee = function() {

}

employeeCtrl.deleteEmployee = function() {

}

module.exports = employeeCtrl;

为什么find不是函数？

这是模型：

const mongoose = require('mongoose');
const { Schema } = mongoose;

const EmployeeSchema = new Schema({
  name: {type: String, required: true},
  position: {type: String, required: true},
  office: {type: String, required: true},
  salary: {type: Number, required: true}
})

mongoose.model('Employee', EmployeeSchema);

Answer 1

您没有从模型中导出任何东西。您需要像这样导出它：

const mongoose = require('mongoose');
const { Schema } = mongoose;

const EmployeeSchema = new Schema({
  name: {type: String, required: true},
  position: {type: String, required: true},
  office: {type: String, required: true},
  salary: {type: Number, required: true}
})

module.exports = mongoose.model('Employee', EmployeeSchema);

此外，.find()不返回promise。它返回一个query对象，如文档中所述:https://mongoosejs.com/docs/api.html#model_model.find

您需要用.exec()链接它，后者返回promise:https://mongoosejs.com/docs/api.html#query_query-exec

employeeCtrl.getEmployees = async (req, res) => {
  const employees = await Employee.find().exec();
  res.json(employees);
}