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Be aware that due to usage of some ES2019 and newer Node.js features, you also have to use Node.js v12.4.0 or newer.


First of all, you should perform all the steps described in the TypeGraphQL installation instruction:

typegraphql-prisma generator

After that, you have to install the generator, as a dev dependency:

$ npm i -D typegraphql-prisma

Furthermore, typegraphql-prisma requires Prisma to work properly, so please install Prisma dependencies if you don't have it already installed:

$ npm i -D prisma
$ npm i @prisma/client

Be aware that typegraphql-prisma is designed to work with a selected versions of prisma.

Please make sure you use prisma and @prisma/client of version matching ^4.14.0. Otherwise, the runtime check will report an error when you run the generator.

Additional dependencies

You also need to install the GraphQL Scalars library (to support the Prisma Json, BigInt and Byte types):

$ npm i graphql-scalars

In order to properly support the aggregate and group by queries, the graphql-fields package is used, so it also has to be installed:

$ npm i graphql-fields @types/graphql-fields

Finally, please also install the tslib package, which is required for applying the additional decorators properly:

$ npm i tslib

TypeScript configuration

As prisma emits multiple files, make sure you have your tsconfig set properly to "module": "commonjs":

"compilerOptions": {
"target": "es2018",
"module": "commonjs",
"lib": ["es2018", "esnext.asynciterable"],
"experimentalDecorators": true,
"emitDecoratorMetadata": true

Otherwise you may experience runtime errors like ReferenceError: Cannot access 'BankAccountWhereInput' before initialization. It's because those generated files rely on each other, so commonjs is needed to handle that cyclic imports.