Start server doesn't work

[amantiwari1]

Aman@DESKTOP-LGSE6SC MINGW64 /d/learn/graphql/2-basic
$ yarn 
yarn install v1.22.10
[1/4] Resolving packages...
[2/4] Fetching packages...
[3/4] Linking dependencies...
warning " > type-graphql@1.1.1" has unmet peer dependency "class-validator@>=0.12.0".
[4/4] Building fresh packages...
Done in 67.49s.

Aman@DESKTOP-LGSE6SC MINGW64 /d/learn/graphql/2-basic
$ yarn start
yarn run v1.22.10
$ ts-node --transpile-only ./index.ts

D:\learn\graphql\2-basic\node_modules\type-graphql\dist\helpers\findType.js:19
        throw new errors_1.NoExplicitTypeError(prototype.constructor.name, propertyKey, parameterIndex, argName);
              ^
Error: Unable to infer GraphQL type from TypeScript reflection system. You need to provide explicit type for parameter #2 of 'post' of 'PostCrudResolver' class.
    at Object.findType (D:\learn\graphql\2-basic\node_modules\type-graphql\dist\helpers\findType.js:19:15)
    at Object.getParamInfo (D:\learn\graphql\2-basic\node_modules\type-graphql\dist\helpers\params.js:10:49)
    at D:\learn\graphql\2-basic\node_modules\type-graphql\dist\decorators\Args.js:12:25
    at D:\learn\graphql\2-basic\prisma\generated\type-graphql\resolvers\crud\Post\PostCrudResolver.ts:39:37
    at DecorateProperty (D:\learn\graphql\2-basic\node_modules\reflect-metadata\Reflect.js:553:33)
    at Object.decorate (D:\learn\graphql\2-basic\node_modules\reflect-metadata\Reflect.js:123:24)
    at __decorate (D:\learn\graphql\2-basic\prisma\generated\type-graphql\resolvers\crud\Post\PostCrudResolver.ts:27:92)
    at D:\learn\graphql\2-basic\prisma\generated\type-graphql\resolvers\crud\Post\PostCrudResolver.ts:26:3
    at Object.<anonymous> (D:\learn\graphql\2-basic\prisma\generated\type-graphql\resolvers\crud\Post\PostCrudResolver.ts:22:1)
    at Module._compile (internal/modules/cjs/loader.js:1068:30)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.



$ yarn prisma generate
yarn run v1.22.10
$ D:\learn\graphql\2-basic\node_modules\.bin\prisma generate
Prisma schema loaded from prisma\schema.prisma

✔ Generated Prisma Client (2.26.0) to .\node_modules\@prisma\client in 374ms

✔ Generated TypeGraphQL integration to .\prisma\generated\type-graphql in 2.53s
You can now start using Prisma Client in your code. Reference: https://pris.ly/d/client

import { PrismaClient } from '@prisma/client'
const prisma = new PrismaClient()

Done in 6.62s.

Aman@DESKTOP-LGSE6SC MINGW64 /d/learn/graphql/2-basic
$ yarn start
yarn run v1.22.10
$ ts-node --transpile-only ./index.ts

D:\learn\graphql\2-basic\node_modules\type-graphql\dist\helpers\findType.js:19
        throw new errors_1.NoExplicitTypeError(prototype.constructor.name, propertyKey, parameterIndex, argName);
              ^
Error: Unable to infer GraphQL type from TypeScript reflection system. You need to provide explicit type for parameter #2 of 'post' of 'PostCrudResolver' class.
    at Object.findType (D:\learn\graphql\2-basic\node_modules\type-graphql\dist\helpers\findType.js:19:15)
    at Object.getParamInfo (D:\learn\graphql\2-basic\node_modules\type-graphql\dist\helpers\params.js:10:49)
    at D:\learn\graphql\2-basic\node_modules\type-graphql\dist\decorators\Args.js:12:25
    at D:\learn\graphql\2-basic\prisma\generated\type-graphql\resolvers\crud\Post\PostCrudResolver.ts:39:37
    at DecorateProperty (D:\learn\graphql\2-basic\node_modules\reflect-metadata\Reflect.js:553:33)
    at Object.decorate (D:\learn\graphql\2-basic\node_modules\reflect-metadata\Reflect.js:123:24)
    at __decorate (D:\learn\graphql\2-basic\prisma\generated\type-graphql\resolvers\crud\Post\PostCrudResolver.ts:27:92)
    at D:\learn\graphql\2-basic\prisma\generated\type-graphql\resolvers\crud\Post\PostCrudResolver.ts:26:3
    at Object.<anonymous> (D:\learn\graphql\2-basic\prisma\generated\type-graphql\resolvers\crud\Post\PostCrudResolver.ts:22:1)
    at Module._compile (internal/modules/cjs/loader.js:1068:30)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

deleted node_module
start yarn again and result in same error

[amantiwari1]

here is error

Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option in your 'tsconfig' or 'jsconfig' to remove this warning

[MichalLytek]

What is your environment? OS, node version, etc.?

[amantiwari1]

node - 14.17.0
yarn - 1.22.10
OS - Windows 10
npm - 6.14.13

[MichalLytek]

And what are the steps you're doing?

1. Create new folder and open it.
2. git clone https://github.com/MichalLytek/typegraphql-prisma .
3. cd examples/2-basic
4. yarn
5. yarn prisma generate
6. yarn start

[amantiwari1]

it is working fine because I didn't clone due to 243 MB that's why I decided to download speife folder through downgit.com
thank you