问题
After transpiling the code using the command "yarn tsc", I tried to execute my code and got the error in the image below. When I went to check the reason for the error, I saw that my Sequelize model classes are not being stacked, they are empty. I couldn't find explanations anywhere about the reason for this, nor in the Sequelize documentation. Could anyone help?
My dependencies
"dependencies": {
"@babel/plugin-proposal-class-properties": "^7.8.3",
"@types/bcrypt": "^3.0.0",
"@types/cors": "^2.8.6",
"@types/jsonwebtoken": "^8.5.0",
"@types/moment": "^2.13.0",
"@types/nodemailer": "^6.4.0",
"@types/ws": "^7.2.4",
"axios": "^0.19.2",
"bcrypt": "^4.0.1",
"cep-promise": "^3.0.9",
"class-transformer": "^0.2.3",
"class-validator": "^0.12.2",
"cors": "^2.8.5",
"discord.js": "^12.2.0",
"dotenv": "^8.2.0",
"express": "^4.17.1",
"jsonwebtoken": "^8.5.1",
"jwt-then": "^1.0.1",
"melif": "^1.0.6",
"moment": "^2.25.3",
"mysql2": "^2.1.0",
"nodemailer": "^6.4.6",
"reflect-metadata": "^0.1.13",
"sequelize": "^5.21.5",
"sequelize-cli": "^5.5.1",
"sequelize-cli-typescript": "^3.2.0-c",
"ts-node": "^8.10.1",
"typescript": "^3.9.2"
},
"devDependencies": {
"@babel/cli": "^7.8.4",
"@babel/core": "^7.9.6",
"@babel/plugin-transform-runtime": "^7.9.6",
"@babel/preset-env": "^7.9.6",
"@babel/preset-typescript": "^7.9.0",
"@babel/register": "^7.9.0",
"@types/bluebird": "^3.5.30",
"@types/express": "^4.17.6",
"@types/node": "^14.0.1",
"@types/sequelize": "^4.28.9",
"@types/validator": "^12.0.1",
"@typescript-eslint/eslint-plugin": "^2.33.0",
"@typescript-eslint/parser": "^2.33.0",
"eslint": "^7.0.0",
"eslint-config-standard": "^14.1.1",
"eslint-plugin-import": "^2.20.2",
"eslint-plugin-node": "^11.1.0",
"eslint-plugin-promise": "^4.2.1",
"eslint-plugin-standard": "^4.0.1",
"nodemon": "^2.0.4",
"sucrase": "^3.15.0",
"typescript": "^3.9.2"
}
My 'tsconfig.json'
{
"compilerOptions": {
"module": "commonjs",
"moduleResolution": "node",
//"esModuleInterop": true,
"resolveJsonModule": true,
"experimentalDecorators": true,
"outDir": "./dist",
"target": "es6",
//"noEmit": true,
//"allowSyntheticDefaultImports": true,
"types": [
"node"
]
},
"include": [
"src"
],
"exclude": [
"node_modules"
],
"compileOnSave": false
}
Class User.ts
import { Sequelize, Model, DataTypes, HasManyGetAssociationsMixin, HasManyAddAssociationMixin, HasManyHasAssociationMixin, Association, HasManyCountAssociationsMixin, HasManyCreateAssociationMixin, BelongsToManyGetAssociationsMixin, BelongsToManyAddAssociationMixin, BelongsToManyHasAssociationMixin, BelongsToManyCountAssociationsMixin, BelongsToManyCreateAssociationMixin, HasManyRemoveAssociationMixin } from 'sequelize'
import { Route } from './Route'
import { Company } from './Company'
import { Account } from './Account'
import { DoneRoute } from './DoneRoute'
import { DoneLesson } from './DoneLesson'
import { Payment } from './Payment'
export interface UserI {
id?: number | null;
name: string;
email: string;
password: string;
introduced: boolean;
paid_access_expiration: Date;
}
export class User extends Model implements UserI {
public id?: number | null;
public name!: string;
public email!: string;
public password!: string;
public introduced!: boolean;
public paid_access_expiration!: Date;
public getRoutes!: BelongsToManyGetAssociationsMixin<Route>; // Note the null assertions!
public addRoute!: BelongsToManyAddAssociationMixin<Route, number>;
public hasRoute!: BelongsToManyHasAssociationMixin<Route, number>;
public removeRoute!: HasManyRemoveAssociationMixin<Route, number>;
public countRoutes!: BelongsToManyCountAssociationsMixin;
public createRoute!: BelongsToManyCreateAssociationMixin<Route>;
public getCompanies!: BelongsToManyGetAssociationsMixin<Company>; // Note the null assertions!
public addCompany!: BelongsToManyAddAssociationMixin<Company, number>;
public hasCompany!: BelongsToManyHasAssociationMixin<Company, number>;
public removeCompany!: HasManyRemoveAssociationMixin<Company, number>;
public countCompanies!: BelongsToManyCountAssociationsMixin;
public createCompany!: BelongsToManyCreateAssociationMixin<Company>;
public getDoneRoutes!: HasManyGetAssociationsMixin<DoneRoute>; // Note the null assertions!
public addDoneRoute!: HasManyAddAssociationMixin<DoneRoute, number>;
public hasDoneRoute!: HasManyHasAssociationMixin<DoneRoute, number>;
public removeDoneRoute!: HasManyRemoveAssociationMixin<DoneRoute, number>;
public countDoneRoutes!: HasManyCountAssociationsMixin;
public createDoneRoute!: HasManyCreateAssociationMixin<DoneRoute>;
public getDoneLessons!: HasManyGetAssociationsMixin<DoneLesson>; // Note the null assertions!
public addDoneLesson!: HasManyAddAssociationMixin<DoneLesson, number>;
public hasDoneLesson!: HasManyHasAssociationMixin<DoneLesson, number>;
public removeDoneLesson!: HasManyRemoveAssociationMixin<DoneLesson, number>;
public countDoneLessons!: HasManyCountAssociationsMixin;
public createDoneLesson!: HasManyCreateAssociationMixin<DoneLesson>;
public getAccounts!: HasManyGetAssociationsMixin<Account>; // Note the null assertions!
public addAccount!: HasManyAddAssociationMixin<Account, number>;
public hasAccount!: HasManyHasAssociationMixin<Account, number>;
public removeAccount!: HasManyRemoveAssociationMixin<Account, number>;
public countAccounts!: HasManyCountAssociationsMixin;
public createAccount!: HasManyCreateAssociationMixin<Account>;
public getPayments!: HasManyGetAssociationsMixin<Payment>; // Note the null assertions!
public addPayment!: HasManyAddAssociationMixin<Payment, number>;
public hasPayment!: HasManyHasAssociationMixin<Payment, number>;
public removePayment!: HasManyRemoveAssociationMixin<Payment, number>;
public countPayments!: HasManyCountAssociationsMixin;
public createPayment!: HasManyCreateAssociationMixin<Payment>;
public readonly routes?: Route[];
public readonly companies?: Company[];
public readonly done_routes?: DoneRoute[];
public readonly done_lessons?: DoneLesson[];
public readonly accounts?: Account[];
public readonly payments?: Payment[];
// timestamps!
public readonly createdAt!: Date;
public readonly updatedAt!: Date;
public static associations: {
routes: Association<User, Route>;
companies: Association<User, Company>;
done_routes: Association<User, DoneRoute>;
done_lessons: Association<User, DoneLesson>;
accounts: Association<User, Account>;
payments: Association<User, Payment>;
};
}
export function init (sequelize: Sequelize): void {
User.init(
{
id: {
type: DataTypes.INTEGER.UNSIGNED,
autoIncrement: true,
primaryKey: true
},
name: {
type: DataTypes.STRING,
allowNull: false
},
email: {
type: DataTypes.STRING,
allowNull: false
},
password: {
type: DataTypes.STRING,
allowNull: false
},
introduced: {
type: DataTypes.BOOLEAN,
defaultValue: false,
allowNull: true
},
paid_access_expiration: {
type: DataTypes.DATE,
allowNull: false
}
// Colocar Relações
},
{
tableName: 'users',
sequelize: sequelize // this bit is important
}
)
}
export function associate (sequelize: Sequelize): void {
User.belongsToMany(sequelize.models.Route, { foreignKey: 'user_id', through: 'user_routes', as: 'routes' })
User.belongsToMany(sequelize.models.Company, { foreignKey: 'user_id', through: 'user_companies', as: 'companies' })
User.hasMany(sequelize.models.DoneLesson, { foreignKey: 'user_id', as: 'done_lessons' })
User.hasMany(sequelize.models.DoneRoute, { foreignKey: 'user_id', as: 'done_routes' })
User.hasMany(sequelize.models.Account, { foreignKey: 'user_id', as: 'accounts' })
User.hasMany(sequelize.models.Payment, { foreignKey: 'user_id', as: 'payments' })
}
Class User.js after command "yarn tsc"
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.associate = exports.init = exports.User = void 0;
const sequelize_1 = require("sequelize");
class User extends sequelize_1.Model {
}
exports.User = User;
function init(sequelize) {
User.init({
id: {
type: sequelize_1.DataTypes.INTEGER.UNSIGNED,
autoIncrement: true,
primaryKey: true
},
name: {
type: sequelize_1.DataTypes.STRING,
allowNull: false
},
email: {
type: sequelize_1.DataTypes.STRING,
allowNull: false
},
password: {
type: sequelize_1.DataTypes.STRING,
allowNull: false
},
introduced: {
type: sequelize_1.DataTypes.BOOLEAN,
defaultValue: false,
allowNull: true
},
paid_access_expiration: {
type: sequelize_1.DataTypes.DATE,
allowNull: false
}
// Colocar Relações
}, {
tableName: 'users',
sequelize: sequelize // this bit is important
});
}
exports.init = init;
function associate(sequelize) {
User.belongsToMany(sequelize.models.Route, { foreignKey: 'user_id', through: 'user_routes', as: 'routes' });
User.belongsToMany(sequelize.models.Company, { foreignKey: 'user_id', through: 'user_companies', as: 'companies' });
User.hasMany(sequelize.models.DoneLesson, { foreignKey: 'user_id', as: 'done_lessons' });
User.hasMany(sequelize.models.DoneRoute, { foreignKey: 'user_id', as: 'done_routes' });
User.hasMany(sequelize.models.Account, { foreignKey: 'user_id', as: 'accounts' });
User.hasMany(sequelize.models.Payment, { foreignKey: 'user_id', as: 'payments' });
}
exports.associate = associate;
回答1:
It was quite some time ago when I think I ran into this issue - but none-the-less - posting my (vaguely) remembered solution might still be helpful.
My models are in a "models" folder - and so I excluded the @babel/plugin-proposal-class-properties babel plugin from compiling that folder.
I do not remember why there is a loose: true option set. Try with/without it and see if it changes the behavior.
There is a bug logged - https://github.com/sequelize/sequelize/issues/10579 - allegedly closed (as at January 2021) - but it doesn't really seem to be solved.
{
"env": {
"development": {
"presets": [
[
"next/babel"
]
],
"plugins": [
[
"@babel/plugin-proposal-class-properties",
{
"exclude": "models",
"loose": true
}
]
]
},
"production": {
"presets": [
"next/babel"
],
"plugins": [
[
"@babel/plugin-proposal-class-properties",
{
"exclude": "models",
"loose": true
}
]
]
},
...
}
来源：https://stackoverflow.com/questions/61960885/how-to-make-typescript-transpile-my-sequelize-model