sequelize
Model query problem when using webpack
Issue
Hi, recently i built a koa2 app with sequelize-typscript, and bundle it using it using webpack v5, it worked perfectly fine until when i changed webpack mode from development to production. When it conducted some model query, findAll for example, there was an error said "TypeError: Cannot read properties of undefined (reading 'findAll')". I assume something wrong happened when minimize , but i'm not sure.( I added 8 models on the sequlize instance, but when it minimized, it turned out with only 3.) Can you help me? Thanks.
Versions
- sequelize: 6.28.0
- sequelize-typescript: 2.1.5
- typescript: 4.9.4
- webpack: 5.75.0
Issue type
- [x] bug report
- [ ] feature request
Actual behavior
When codes were compiled to js, the Error:
<-- GET /api/people/
----- TypeError: Cannot read properties of undefined (reading 'findAll')
at DivisionService.
Related code
webpack.config.js:
const path = require("path");
const webpack = require("webpack");
const nodeExternals = require("webpack-node-externals");
const { CleanWebpackPlugin } = require("clean-webpack-plugin");
const webpackConfig = {
mode: **"production",**
target: "node",
entry: {
server: path.join(__dirname, "./bin/www.ts"),
},
output: {
filename: "[name].bundle.js",
path: path.join(__dirname, "./dist"),
},
module: {
rules: [
{
test: /\.ts?$/,
use: [
"babel-loader",
{
loader: "ts-loader",
},
],
exclude: /node_modules/,
},
],
},
resolve: {
extensions: [".js", ".ts"],
},
externals: [nodeExternals()],
plugins: [
new CleanWebpackPlugin(),
],
};
module.exports = webpackConfig;
seq.ts:
import { Sequelize } from "sequelize-typescript";
import { MYSQL_CONF } from "../conf/db";
import Models from "./models/index";
const seq = new Sequelize(MYSQL_CONF);
const models: any[] = [];
for (const model in Models) {
models.push((Models as any)[model]);
}
seq.addModels(models);
export default seq;
people.model.ts:
import {
Table,
Column,
Model,
BelongsTo,
ForeignKey,
HasMany,
} from "sequelize-typescript";
import Division from "./divison.model";
import Record from "./record.model";
@Table({
timestamps: false,
})
export default class People extends Model {
@Column({
allowNull: false,
})
name!: string;
@Column
catagory!: number;
@Column
work_age!: number;
@ForeignKey(() => Division)
@Column
division_id!: number;
@BelongsTo(() => Division)
division!: Division;
@HasMany(() => Record)
record!: Record[];
}
PeopleService.ts:
import seq from "../db/seq";
import { PersonInfoInter } from "../interface/PeopleInterface";
class PeopleService {
static PeopleService: PeopleService = new PeopleService();
private People = seq.models.People;
async findAllPeopleInfo() {
return await this.People.findAll();
}
}
export default PeopleService.PeopleService;
tsconfig.json:
{
"compilerOptions": {
"target": "es2016",
"experimentalDecorators": true,
"emitDecoratorMetadata": true,
"module": "commonjs",
"outDir": "./dist",
"esModuleInterop": true,
"forceConsistentCasingInFileNames": true,
"strict": true,
"skipLibCheck": true
}
}
