TypeScript graphql.buildSchema函数代码示例

function valueToSchema(
  schema: GraphQLSchema | string | Source | IntrospectionResult,
): GraphQLSchema {
  if (schema instanceof GraphQLSchema) {
    return schema
  } else if (typeof schema === 'string') {
    return buildSchema(schema)
  } else if (schema instanceof Source) {
    return buildSchema(schema)
  } else if (typeof schema === 'object' && !Array.isArray(schema)) {
    return introspectionToSchema(schema as IntrospectionResult)
  }
  throw new Error('Can not convert data to a schema')
}

  it('should override the scope from the target type with that specified on a field', async () => {
    const schema = buildSchema(`
      type Query {
        droid(id: ID!): Droid @cacheControl(scope: PRIVATE)
      }

      type Droid @cacheControl(maxAge: 60, scope: PUBLIC) {
        id: ID!
        name: String!
      }
    `);

    const hints = await collectCacheControlHints(
      schema,
      `
        query {
          droid(id: 2001) {
            name
          }
        }
      `,
      { defaultMaxAge: 10 },
    );

    expect(hints).toContainEqual({
      path: ['droid'],
      maxAge: 60,
      scope: CacheScope.Private,
    });
  });

export async function graphQLTypes(): Promise<void> {
    const schemaStr = await readFile(GRAPHQL_SCHEMA_PATH, 'utf8')
    const schema = buildSchema(schemaStr)
    const result = (await graphql(schema, introspectionQuery)) as { data: IntrospectionQuery }

    const formatOptions = (await resolveConfig(__dirname, { config: __dirname + '/../prettier.config.js' }))!
    const typings =
        'export type ID = string\n\n' +
        generateNamespace(
            '',
            result,
            {
                typeMap: {
                    ...DEFAULT_TYPE_MAP,
                    ID: 'ID',
                },
            },
            {
                generateNamespace: (name: string, interfaces: string) => interfaces,
                interfaceBuilder: (name: string, body: string) =>
                    'export ' + DEFAULT_OPTIONS.interfaceBuilder(name, body),
                enumTypeBuilder: (name: string, values: string) =>
                    'export ' + DEFAULT_OPTIONS.enumTypeBuilder(name, values),
                typeBuilder: (name: string, body: string) => 'export ' + DEFAULT_OPTIONS.typeBuilder(name, body),
                wrapList: (type: string) => `${type}[]`,
                postProcessor: (code: string) => format(code, { ...formatOptions, parser: 'typescript' }),
            }
        )
    await writeFile(__dirname + '/src/graphql/schema.ts', typings)
}

export const jsSchemaLoader: SchemaLoader = async function (options: TJsSchemaLoaderOptions) {

    const schemaPath = resolve(options.schemaFile);
    let schemaModule = require(schemaPath);
    let schema: string;

    // check if exist default in module
    if (typeof schemaModule === 'object') {
        schemaModule = schemaModule.default
    }

    // check for array of definition
    if (Array.isArray(schemaModule)){
        schema = schemaModule.join('');

    // check for array array wrapped in a function
    } else if  (typeof schemaModule === 'function')  {
        schema = schemaModule().join('');

    } else {
        throw new Error(`Unexpected schema definition on "${schemaModule}", must be an array or function`)
    }

    const introspection = await execute(
        buildSchema(schema),
        parse(introspectionQuery)
    ) as Introspection;

    return introspection.data.__schema;
};

test('typescript definition generator', t => {
  const schema = buildSchema(typeDefs)
  const generator = new JavascriptGenerator({
    schema,
  })
  const javascript = generator.renderJavascript()
  t.snapshot(javascript)
})

test('typescript generator', t => {
  const schema = buildSchema(typeDefs)
  const generator = new TypescriptGenerator({
    schema,
  })
  const result = generator.render()
  t.snapshot(result)
})

test('typescript generator - embedded', t => {
  const schema = buildSchema(typeDefs)
  const generator = new TypescriptGenerator({
    schema,
    internalTypes: parseInternalTypes(datamodel, DatabaseType.postgres).types,
  })
  const result = generator.render()
  t.snapshot(result)
})