Issue: Module not found error encountered while applying decorators

I am attempting to incorporate decorators into my TypeScript class. Here is what I have done:

import {
  Model,
  ModelCtor
} from 'sequelize/types';

function decorator(constructor) {
  // 
}

@decorator
class Service implements IService {
  // when I use 'private User:  any' instead, it works fine 
  constructor(private User: ModelCtor < Model < any, any >> ) {
      
  }
}

Upon running this code, I encounter the following error message:

Error: Cannot find module 'sequelize/types'
In this instance, I am importing sequelize/types, but the same issue arises with other .d.ts files.

I have installed the necessary types and everything functions properly without decorators. Furthermore, no errors occur when assigning the type any to the constructor parameter: private User: any

I have researched possible solutions, but so far, I haven't found anything beneficial.

For reference, here is my tsconfig.json file:

{
"compilerOptions": {
 "target": "es5",
 "module": "commonjs",
 "outDir": "./build",
 "sourceMap": true,
 "typeRoots": [
   "./node_modules/@types",
   "./lib/types/index",
   "./node_modules/sequelize/types/"
 ],
 "allowSyntheticDefaultImports": true,
 "experimentalDecorators": true,
 "emitDecoratorMetadata": true,
 "forceConsistentCasingInFileNames": true,
 "moduleResolution": "node",
 "pretty": true,
 "allowJs": true,
 "noEmit": false,
 "esModuleInterop": true,
},
"include": [
 "./index.ts",
 "./lib"
],
"exclude": [
 "node_modules",
 "tests",
 ".vscode",
 "doc",

]
}

Answer №1

While working on my TypeScript project, I encountered an issue when using the --transpile-only flag.

To resolve this issue, I found that removing this specific flag was the solution.

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