GraphQL Basics

• Building a out a simple GraphQL application from scratch
• Uses graphql-yoga
• For Subscription graphql-subscriptions

Build

• npm i
• npm start - starts up with nodemon
• Go to http://localhost:4000 (GraphQL Playground)
• The code in the root covers basic from-scratch graphql concepts
• Code under graphql-prisma includes integration with Postgres db deployed in Heroku, adds Prisma running as Docker cotainer and I build Types covered in the from-scratch-code base.
• Uses prisma-bindings to interact with nodejs bindings
• Uses graphql-cli to call get-schema to download/generate (prisma.graphql) the schema from prisma's end-point
• Note for setting up graphql-cli this is what worked for me:

Make sure you're on latest Node version

1. install graphql-codegen

yarn add @graphql-cli/codegen @graphql-codegen/schema-ast --dev

OR install it globally, your choice -

yarn global add graphql-cli graphql-codegen

I had issues executing local dev-dependencies from mac bash, so installed it globally as bash looks at user/bin for the package to execute.



2. Inside root folder graphql-prisma, create codegen.yml, with the following contents -

schema: http://localhost:4466
extensions:
  codegen:
    generates:
      ./src/generated/prisma.graphql:
        plugins:
          - schema-ast


3. Add following script to package.json -

"get-schema": "graphql-codegen --config ./codegen.yml"



4. On mac bash (terminal command-line) -

yarn get-schema