README.md

esbuild-circular-dependency-error-sample

The build result of the decorator given to the constructor parameters is different between tsc and esbuild(v0.8.42). This repository presents an example of using the Inversify.js decorator.

How to use

1. Run npm install.

2. Run npm run build. The code built by tsc will be output to dist, and the code built by esbuild will be output to dist_esbuild.

3. Run npm run start:tsc. The decorator will be recognized correctly and "app1:count 0" will be output to the console.

4. Run npm run start:esbuild. It does not work properly and the following error occurs.

(node:38860) Warning: Accessing non-existent property 'App1Entity' of module exports inside circular dependency
(Use `node --trace-warnings ...` to show where the warning was created)
(node:38860) UnhandledPromiseRejectionWarning: Error: Entity metadata for App2Entity#app1 was not found. Check if you specified a correct entity object and if it's connected in the connection options.
    at /path/to/node_modules/typeorm/metadata-builder/EntityMetadataBuilder.js:583:23
    at Array.forEach (<anonymous>)
    at EntityMetadataBuilder.computeInverseProperties (/path/to/node_modules/typeorm/metadata-builder/EntityMetadataBuilder.js:579:34)
    at /path/to/node_modules/typeorm/metadata-builder/EntityMetadataBuilder.js:83:74
    at Array.forEach (<anonymous>)
    at EntityMetadataBuilder.build (/path/to/node_modules/typeorm/metadata-builder/EntityMetadataBuilder.js:83:25)
    at ConnectionMetadataBuilder.buildEntityMetadatas (/path/to/node_modules/typeorm/connection/ConnectionMetadataBuilder.js:57:141)
    at Connection.buildMetadatas (/path/to/node_modules/typeorm/connection/Connection.js:514:57)
    at Connection.<anonymous> (/path/to/node_modules/typeorm/connection/Connection.js:127:30)
    at step (/path/to/node_modules/tslib/tslib.js:141:27)
(node:38860) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:38860) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

Problems and solutions

The difference between these two files seems to be the main factor.

• dist/app1/entities/index.js
• dist_esbuild/app1/entities/index.js

// in dist/app1/entities/index.js
"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __exportStar = (this && this.__exportStar) || function(m, exports) {
    for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports, p)) __createBinding(exports, m, p);
};
Object.defineProperty(exports, "__esModule", { value: true });
__exportStar(require("./App1Entity"), exports);
//# sourceMappingURL=index.js.map

// in dist_esbuild/app1/entities/index.js
var __create = Object.create;
var __defProp = Object.defineProperty;
var __getProtoOf = Object.getPrototypeOf;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __markAsModule = (target) => __defProp(target, "__esModule", {value: true});
var __exportStar = (target, module2, desc) => {
  __markAsModule(target);
  if (module2 && typeof module2 === "object" || typeof module2 === "function") {
    for (let key of __getOwnPropNames(module2))
      if (!__hasOwnProp.call(target, key) && key !== "default")
        __defProp(target, key, {get: () => module2[key], enumerable: !(desc = __getOwnPropDesc(module2, key)) || desc.enumerable});
  }
  return target;
};
var __toModule = (module2) => {
  if (module2 && module2.__esModule)
    return module2;
  return __exportStar(__defProp(module2 != null ? __create(__getProtoOf(module2)) : {}, "default", {value: module2, enumerable: true}), module2);
};
__exportStar(exports, __toModule(require("./App1Entity")));
//# sourceMappingURL=index.js.map

To avoid this error in the TypeScript source, you need to change the export notation in index.ts without using * (Star).

// src/app1/entities/index.ts

/** delete */
// export * from './App1Entity';

/** insert */
export { App1Entity } from './App1Entity';
// or
export { default as App1Entity } from './App1Entity';