IsGraphQlErrorResult

isGraphQlErrorResult

@vendure/coreerror-result.ts

Returns true if the ErrorResultUnion is actually an ErrorResult type. This is useful when dealing with certain internal service method that return an ErrorResultUnion.

Example

import { isGraphQlErrorResult } from '@vendure/core';

// ...

const transitionResult = await this.orderService.transitionToState(ctx, order.id, newState);
if (isGraphQlErrorResult(transitionResult)) {
    // The transition failed with an ErrorResult
    throw transitionResult;
} else {
    // TypeScript will correctly infer the type of `transitionResult` to be `Order`
    return transitionResult;
}

Signature

function isGraphQlErrorResult<T extends GraphQLErrorResult | U, U = any>(input: T): input is JustErrorResults<T>

Parameters

input

parameter

T