Error: Generator at prisma-json-schema-generator could not start

[misha-erm]

Hi,

Was going to try your generator but faced this error:

Here is my schema.prisma:

// This is your Prisma schema file,
// learn more about it in the docs: https://pris.ly/d/prisma-schema

datasource db {
  provider          = "postgresql"
  url               = env("DATABASE_URL")
  // needed only when using heroku
  shadowDatabaseUrl = env("SHADOW_DATABASE_URL")
}

generator client {
  provider = "prisma-client-js"
}

generator jsonSchema {
  provider = "prisma-json-schema-generator"
}

model Car {
  id           Int    @id @default(autoincrement())
  manufacturer String
  model        String
  bodyType     String
  engineType   String
  transmission String
  year         Int
  generation   String
  vin          String
  odometer     Json
}

Versions I'm using:
"prisma": "2.17.0",
"prisma-json-schema-generator": "1.2.1"

Any ideas why this is happening?

Thanks in advance for any tips 👍🏻

[valentinpalkovic]

@MikeYermolayev I will take a look! :)

[valentinpalkovic]

@MikeYermolayev The issue is connected with the way you are calling prisma.

Currently, you call prisma directly like this:

$ ./node_modules/.bin/prisma generate

1. Solution

Instead, if you are using yarn, just call prisma like this:

$ yarn prisma generate

This will call prisma the node way, which will also respect the bin folder within the node_modules. Actually, this is very important:

"Within the bin folder, the binaries (executables) from your node modules are located. Executables are linked into {prefix}/bin on Unix, or directly into {prefix} on Windows. When in local mode, executables are linked into ./node_modules/.bin so that they can be made available to scripts run through npm. (For example, so that a test runner will be in the path when you run npm test.)"

When you directly try to run prisma without yarn or npm, the bin folder is not made available to prisma. Therefore prisma-json-schema-generator also cannot be found.

If you don't use yarn, but npm, just place a generate command in the scripts section of your package json and run npm run generate:

...
scripts: {
  ...
 generate: "prisma generate"
  ...
}
...

2. Solution

If you are not able to change the way prisma is called, then change the setup for the prisma-json-schema-generator from:

generator jsonSchema {
  provider = "prisma-json-schema-generator"
}

to:

generator jsonSchema {
  provider = "node node_modules/prisma-json-schema-generator"
}

Hopefully, I could help you! :)

[misha-erm]

Thanks, makes sense👍🏻

Will try the provided advices and reopen if they won't help