How to use the printSchema function from graphql

Find comprehensive JavaScript graphql.printSchema code examples handpicked from public code repositorys.

graphql.printSchema is a function that prints the GraphQL schema in the SDL (Schema Definition Language) format.

service.js

GitHub: moleculerjs/moleculer-apollo-server

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	this.buildLoaderOptionMap(services); // rebuild the options for DataLoaders

	this.shouldUpdateGraphqlSchema = false;

	this.broker.broadcast("graphql.schema.updated", {
		schema: GraphQL.printSchema(schema),
	});
} catch (err) {
	this.logger.error(err);
	throw err;

+ 9 other calls in file

schema-generator.js

GitHub: flaki/strapi-plugin-graphql

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 * Save into a file the readable GraphQL schema.
 *
 * @return void
 */
const writeGenerateSchema = schema => {
  const printSchema = graphql.printSchema(schema);
  return strapi.fs.writeAppFile('exports/graphql/schema.graphql', printSchema);
};

const buildResolvers = resolvers => {

How does graphql.printSchema work?

graphql.printSchema is a function that takes a GraphQL schema object and returns a string representation of the schema, including its types, fields, and directives, that can be used for debugging, testing, and documentation purposes. The function traverses the schema object and generates the string by calling other functions from the graphql library, such as printType, printFields, and printDirectives, that handle the formatting of specific parts of the schema. The resulting string follows the GraphQL schema definition language syntax and can be parsed back into a schema object using the graphql.buildSchema function.

index.js

GitHub: inigolabs/inigo-js

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  // use-case: apollo-server with gateway
  rootInigoInstance.updateSchema(coreSupergraphSdl)
} else {
  // use-case: apollo-server without gateway
  try {
    const schema_str = printSchema(apiSchema)
    rootInigoInstance.updateSchema(schema_str)
  } catch(e) {
    console.error("inigo.js: cannot print schema.", e)
  }

+ 18 other calls in file

update-schema.js

GitHub: baimyrza09/ionic-home-check

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    .send(body)
    .set('Content-Type', 'application/json')
    .set('Authorization', `Bearer ${token.access_token}`);
  if (!response.body.data) return new Error('Не удалось скачать схему!');
  const clientSchema = buildClientSchema(response.body.data);
  const sdl = printSchema(clientSchema);
  fs.writeFileSync(process.env.GRAPHQL_SCHEMA_PATH, sdl);
  console.info('Схема обновилась!');
  console.info('_____________________________________________________');
} catch (e) {

+ 2 other calls in file

Ai Example

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const { buildSchema } = require("graphql");
const { printSchema } = require("graphql");

// Define your schema
const schema = buildSchema(`
type Query {
hello: String
}
`);

// Print the schema as a string
const schemaString = printSchema(schema);

console.log(schemaString);

This code defines a simple GraphQL schema with a hello field and then prints the schema as a string using the printSchema function from the graphql library. The output will be a string representation of the schema definition.

index.js

GitHub: cosad3s/graphql-introspection-converter

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const graphql = require("graphql");
const fs = require("fs");
const schema = require(process.argv[2]);


const clientSchema = graphql.buildClientSchema(schema.data);
const schemaString = graphql.printSchema(clientSchema);


fs.writeFileSync('schema-'+Date.now()+'.graphql',schemaString);

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