Typescript Mongoose - 方法/静态函数未被调用 [Kubernetes - Docker]

Posted 2023-03-11

【中文标题】Typescript Mongoose - 方法/静态函数未被调用 [Kubernetes - Docker]

【英文标题】：Typescript Mongoose - methods / static functions not being called [ Kubernetes - Docker ]

【发布时间】：2021-12-25 20:54:26

【问题描述】：

我在Kubernetes - Docker 中使用mongodb < TypeScript > 时遇到了一个问题。 我在 save 上添加了一个中间件，在 Model 上添加了一个静态函数。使用时不会调用它。它们都不起作用[中间件 - 静态函数]。

用户模型：

import  model, Schema, Model, Document  from "mongoose";
import  Password  from "../service/Password";
/**
 * @interface UserAttr
 * @description It helps the User Model in the moment of being createed
 */

interface UserAttrs 
  email: string;
  password: string;


/**
 * @interface UserModel
 * @description It helps the method of the user being detective on its own model
 */

interface UserModel extends Model<UserDocument> 
  build(attrs: UserAttrs): UserDocument;


/**
 * @interface UserDocument
 * @description It helps the document of the user to work more efficiently
 */

export interface UserDocument extends Document 
  email: string;
  password: string;
  createdAt: string;
  updatedAt: string;


const userSchema = new Schema(
  
    email: 
      type: String,
      required: true,
    ,
    password: 
      type: String,
      required: true,
    ,
  ,
   timestamps: true 
);

const User = model<UserDocument, UserModel>("User", userSchema);

userSchema.statics.build = function (attrs: UserAttrs) 
  return new User(attrs);
;

userSchema.pre(
  "save",
  async function (this: UserDocument, next): Promise<void> 
    console.log("Saving . . . ");
    // const self = this as UserDocument;
    if (this.isModified("password")) 
      const hashedPassword = await Password.toHash(this.get("password"));
      this.set("password", hashedPassword);
    
    next();
  
);

export  User ;

他们被使用的地方：

import  Router, Response, Request  from "express";
import  body, validationResult  from "express-validator";
import  BadRequestError  from "../../errors/BadRequestError";
import  RequestValidationError  from "../../errors/RequestValidationError";
import  User  from "../../models/user.model";

const router: Router = Router();

router.post(
  "/api/users/signup",
  [
    body("email")
      .not()
      .isEmpty()
      .withMessage("Email Field is empty. fill it please")
      .trim()
      .isEmail()
      .normalizeEmail()
      .withMessage("Email is not valid. "),
    body("password")
      .notEmpty()
      .withMessage("Password Field is empty. fill it please")
      .trim()
      .isLength( min: 4, max: 12 )
      .withMessage("Password length is 4 - 12 characters"),
  ],
  async (req: Request, res: Response) => 
    const errors = validationResult(req);
    if (!errors.isEmpty()) 
      throw new RequestValidationError(errors.array());
    

    const  email, password  = req.body;

    const existingUser = await User.findOne(
      email,
    );

    if (existingUser) 
      throw new BadRequestError("Email in use");
    

    const user = User.build(
      email,
      password,
    );

    await user.save();
    res.status(201).json(user);
  
);

export  router as signUpRouter ;

提示：我检查了模型本身 [ new User(...) ] 并按预期工作。我不知道他们为什么不使用 middleware and static function

【参考方案1】：

找了半天，自己找到了上述易出错模块的解决办法。

解决方法：错误是上面写的代码的顺序。模型必须一直向下才能被识别。它根本不会对middlewares、Statics 和Methods 做出反应。确保在导出之前Model 一直向下当您设置一些以前的功能时。

可能必须像以下步骤：

import  model, Schema, Model, Document  from "mongoose";
import  Password  from "../service/Password";
/**
 * @interface UserAttr
 * @description It helps the User Model in the moment of being createed
 */

interface UserAttrs 
  email: string;
  password: string;


/**
 * @interface UserModel
 * @description It helps the method of the user being detective on its own model
 */

interface UserModel extends Model<UserDocument> 
  build(attrs: UserAttrs): UserDocument;


/**
 * @interface UserDocument
 * @description It helps the document of the user to work more efficiently
 */

export interface UserDocument extends Document 
  email: string;
  password: string;
  createdAt: string;
  updatedAt: string;


const userSchema = new Schema(
  
    email: 
      type: String,
      required: true,
    ,
    password: 
      type: String,
      required: true,
    ,
  ,
   timestamps: true 
);

userSchema.statics.build = function (attrs: UserAttrs) 
  return new User(attrs);
;

userSchema.pre(
  "save",
  async function (this: UserDocument, next): Promise<void> 
    console.log("Saving . . . ");
    // const self = this as UserDocument;
    if (this.isModified("password")) 
      const hashedPassword = await Password.toHash(this.get("password"));
      this.set("password", hashedPassword);
    
    next();
  
);

const User = model<UserDocument, UserModel>("User", userSchema);

export default User;