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Printing Schema

One of the powerful points of GraphQL is that GraphQL Schema can be used to describe all the APIs on the server side.

Generating files from Schema

We can use the printSchema function from the graphql package to print out the Schema.

import { weave } from "@gqloom/core"
import { printSchema, lexicographicSortSchema } from "graphql"
import { HelloResolver } from "./resolvers"
import * as fs from "fs"

const schema = weave(HelloResolver)

const schemaText = printSchema(lexicographicSortSchema(schema))

if (process.env.NODE_ENV === "development") {
  fs.writeFileSync("schema.graphql", schemaText)
}

The above code generates a schema.graphql file that contains all the contents of the Schema.

Using GraphQL Schema

GraphQL Schema can be used for many purposes, common uses include:

Merging Schema from multiple microservices into a supergraph for unified cross-service querying on the client side. This architecture is called federation.
Developed and type-checked on the client side using code generation.
Integrate with TypeScript for client-side development for better type checking and auto-completion during development, see gql.tada for more information.

ON THIS PAGE

#Printing Schema

#Generating files from Schema

#Using GraphQL Schema

Printing Schema

Generating files from Schema

Using GraphQL Schema