`graphql/execution`

The graphql/execution module is responsible for the execution phase of fulfilling a GraphQL request. You can import either from the graphql/execution module, or from the root graphql module. For example:

import { execute } from 'graphql'; // ES6
const { execute } = require('graphql'); // CommonJS

Overview

function execute Executes a GraphQL request on the provided schema.

Execution

execute

export function execute({
  schema,
  document
  rootValue,
  contextValue,
  variableValues,
  operationName,
  options,
}: ExecutionParams): MaybePromise<ExecutionResult>;
 
type ExecutionParams = {
  schema: GraphQLSchema;
  document: Document;
  rootValue?: unknown;
  contextValue?: unknown;
  variableValues?: Record<string, unknown>;
  operationName?: string;
  options?: {
    /** Set the maximum number of errors allowed for coercing (defaults to 50). */
    maxCoercionErrors?: number;
  }
};
 
type MaybePromise<T> = Promise<T> | T;
 
interface ExecutionResult<
  TData = ObjMap<unknown>,
  TExtensions = ObjMap<unknown>,
> {
  errors?: ReadonlyArray<GraphQLError>;
  data?: TData | null;
  extensions?: TExtensions;
}

We have another approach with positional arguments, this is however deprecated and set to be removed in v17.

export function execute(
  schema: GraphQLSchema,
  documentAST: Document,
  rootValue?: unknown,
  contextValue?: unknown,
  variableValues?: Record<string, unknown>,
  operationName?: string,
): MaybePromise<ExecutionResult>;

Implements the “Evaluating requests” section of the GraphQL specification.

Returns a Promise that will eventually be resolved and never rejected.

If the arguments to this function do not result in a legal execution context, a GraphQLError will be thrown immediately explaining the invalid input.

ExecutionResult represents the result of execution. data is the result of executing the query, errors is null if no errors occurred, and is a non-empty array if an error occurred.

executeSync

This is a short-hand method that will call execute and when the response can be returned synchronously it will be returned, when a Promise is returned this method will throw an error.

export function executeSync({
  schema,
  document,
  rootValue,
  contextValue,
  variableValues,
  operationName,
  options,
}: ExecutionParams): MaybePromise<ExecutionResult>;
 
type ExecutionParams = {
  schema: GraphQLSchema;
  document: Document;
  rootValue?: unknown;
  contextValue?: unknown;
  variableValues?: Record<string, unknown>;
  operationName?: string;
  options?: {
    /** Set the maximum number of errors allowed for coercing (defaults to 50). */
    maxCoercionErrors?: number;
  }
};
 
type MaybePromise<T> = Promise<T> | T;
 
interface ExecutionResult<
  TData = ObjMap<unknown>,
  TExtensions = ObjMap<unknown>,
> {
  errors?: ReadonlyArray<GraphQLError>;
  data?: TData | null;
  extensions?: TExtensions;
}

We have another approach with positional arguments, this is however deprecated and set to be removed in v17.

export function executeSync(
  schema: GraphQLSchema,
  documentAST: Document,
  rootValue?: unknown,
  contextValue?: unknown,
  variableValues?: Record<string, unknown>,
  operationName?: string,
): ExecutionResult;

Execution options

maxCoercionErrors

Set the maximum number of errors allowed for coercing variables, this implements a default limit of 50 errors.

graphql/error graphql/language