metatype is not a constructor

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when i set a string value to provide property. it’s ok

providers: [
        { provide: 'PERSON_REPOSITORY', useClass: PersonRepository },
],

but when i set a const instead of string value 😐

import { PERSON_REPOSITORY } from '../../common/data';
.
.
.
providers: [
        { provide: PERSON_REPOSITORY, useClass: PersonRepository },
],
.
.
.


[Nest] 11352   - 2019-2-17 17:47:26   [NestFactory] Starting Nest application...
[Nest] 11352   - 2019-2-17 17:47:26   [ExceptionHandler] metatype is not a constructor +159ms
TypeError: metatype is not a constructor
    at resolveConstructorParams (E:\My Project\fennec\fennec.lord\node_modules\@nestjs\core\injector\injector.js:65:84)
    at Injector.resolveConstructorParams (E:\My Project\fennec\fennec.lord\node_modules\@nestjs\core\injector\injector.js:99:30)
    at process._tickCallback (internal/process/next_tick.js:68:7)
    at Function.Module.runMain (internal/modules/cjs/loader.js:745:11)
    at Object.<anonymous> (E:\My Project\fennec\fennec.lord\node_modules\ts-node\src\_bin.ts:182:12)
    at Module._compile (internal/modules/cjs/loader.js:689:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
    at Module.load (internal/modules/cjs/loader.js:599:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
    at Function.Module._load (internal/modules/cjs/loader.js:530:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:742:12)
    at startup (internal/bootstrap/node.js:266:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:596:3)
[Nest] 11352   - 2019-2-17 17:47:26   [InstanceLoader] AppModule dependencies initialized +4ms
[Nest] 11352   - 2019-2-17 17:47:26   [InstanceLoader] MongooseModule dependencies initialized +1ms
[Nest] 11352   - 2019-2-17 17:47:26   [InstanceLoader] PassportModule dependencies initialized +1ms
 1: 00007FF76D620205
 2: 00007FF76D5FA176
 3: 00007FF76D58AB99
 4: 00007FF76DC34102
 5: 00007FF76DC3556D
 6: 00007FF76DC345F9
 7: 00007FF76DC344DB
 8: 00000019B8E841C1
npm ERR! code ELIFECYCLE
npm ERR! errno 134
npm ERR! fennec.lord@1.0.0 start: `ts-node -r tsconfig-paths/register src/main.ts`
npm ERR! Exit status 134
npm ERR!
npm ERR! Failed at the fennec.lord@1.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\vahid\AppData\Roaming\npm-cache\_logs\2019-02-17T14_17_26_767Z-debug.log

[borhani-vahid]

Thank you kamil Of course, by doing this in the minimal repository, the problem is solved, but unfortunately, the actual project still has the same error message. So after reviewing the files that I deleted from the project, I was surprised to find that the problem was solved by renaming the model folder to any other name. I really did not notice the relevance of the model folder with PERSON_REPOSITORY!

[kamilmysliwiec]

export declare const PERSON_REPOSITORY = 'PERSON_REPOSITORY';

change to:

export const PERSON_REPOSITORY = 'PERSON_REPOSITORY';