[英]Typescript, return type not assignable to another
我不知道如何正确响应我的组件。
我收到此错误:
Type 'Promise<AnyTransaction>[]' is not assignable to type 'AnyTransaction[]'.
Type 'Promise<AnyTransaction>' is missing the following properties from type 'Transaction<any, any, any, any>': id, feeLookup, sender, receiver, and 10 more.
该组件如下所示:
import { AnyTransaction, TransactionStatus } from '../types';
// more code...
export default async function getMyTransactions (
_parent: unknown,
_args: unknown,
// context: Context,
): Promise<Array<AnyTransaction>> {
// ): Promise<String> {
// some code
const { Items } = await DocumentClient.getInstance()
.query(some query
.promise();
const transactions = (Items || []) as Array<AnyTransaction>;
// transactions is an array of objects.
return transactions.map(parseDeprecatedStatuses).map(processTransactionStatus);
// parseDeprecatedStatuses: just parse some data
// processTransactionStatus code is below
}
// processTransactionStatus.ts:
import Factory from '../factory';
import { AnyTransaction } from '../types';
export default async function processTransactionStatus (
transaction: AnyTransaction
): Promise<AnyTransaction>{
const agent = Factory.buildAgentFromCode(transaction.destination.agent);
transaction.status = await agent.fetchTransactionStatus(transaction)
return transaction;
}
我真的很困惑我如何从组件返回以及我得到了什么。
您正在映射到承诺列表,因此您必须等待所有这些:
return await Promise.all(transactions
.map(parseDeprecatedStatuses)
.map(processTransactionStatus));
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