＆＃x27;身体的论点＆＃x27;在Next.js＆＃x27的API中未提供Send（）\ JSON（）

发布于 2025-01-30 13:57:33 字数 972 浏览 3 评论 0原文

我在Next.js中使用API路线。在“ API”文件夹中，我的'file.tsx'包含以下内容：

import type { NextApiRequest, NextApiResponse } from "next";
const someFunction = (req: NextApiRequest, res: NextApiResponse<data>) => { the rest of the code... }

一切都起作用。但是，关于以下行：

res.status(200).send();

send（）突出显示，我会收到以下typescript错误：

期望有1个参数，但有0.TS（2554）Utils.d.ts（182，25）：没有提供“身体”的论点。

跟随文档（ https://nextjs.org/docs/api-routes/response-routes/response-routes/response-routes/response-routes/response-routes-帮助者），我尝试添加一个参数，例如res.status（200）.send（{key：“ value”}）或res.status（200）。（“字符串”）或两者都带有json（）而不是send（）。

我什至复制了文档中的确切示例，但此错误仍然存在。清除错误（作为测试）的唯一一件事是更改键入 - 但自然，这是不希望的，因为错误可能是有原因的。

我在这里错过了什么吗？

原文

I'm using an API route in Next.js. In the 'api' folder, my 'file.tsx' contain the following:

import type { NextApiRequest, NextApiResponse } from "next";
const someFunction = (req: NextApiRequest, res: NextApiResponse<data>) => { the rest of the code... }

Everything does work. But, regarding the following line:

res.status(200).send();

send() is highlighted and I get the following TypeScript error:

Expected 1 arguments, but got 0.ts(2554) utils.d.ts(182, 25): An
argument for 'body' was not provided.

Following the docs (https://nextjs.org/docs/api-routes/response-helpers), I tried adding an argument like res.status(200).send({key: "value"}), or res.status(200).send("string") or both with json() instead of send().

I even copied the exact examples from the docs, but still this error persist.
The only thing that cleared the error (as a test) was changing the typing - but naturally, this is undesirable, as the error is probably there for a reason.

Am I missing something here?

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夏雨凉 2025-02-06 13:57:33

这里有几件事。对于第一个错误，打字稿抱怨没有提供“身体”的论点。众所周知，此错误非常简单。另一个错误来自已经为您定义的响应类型：

res: NextApiResponse<Data>

其中data类型定义为：

type Data = {
  name: string;
};

它是具有类型string 。

因此，如果您想发送一个普通的字符串，那么您需要对此进行修改：

type Data = string;

您还可以在响应中直接定义它，例如：


const someFunction = (req: NextApiRequest, res: NextApiResponse<string>) => {
  return res.status(200).json("hello");
};

export default someFunction

无论如何，您需要牢记打字稿需要您要明确您发送哪种类型的数据作为响应。在项目中使用打字稿的重点是通过将类型的安全检查添加到代码中来防止错误。

参见日常类型以了解更多。

There are a couple of things going on here. For the first error, Typescript is complaining that no argument for 'body' was provided. This error is pretty straightforward as you already know. The other error comes from the type of response that is already defined for you:

res: NextApiResponse<Data>

Where the Data type is defined as:

type Data = {
  name: string;
};

Which is a an object with a name property that is of type string.

So, if you want to send a plain string then, you'll need to modify the type to this:

type Data = string;

You could also define it directly in the response, like this:


const someFunction = (req: NextApiRequest, res: NextApiResponse<string>) => {
  return res.status(200).json("hello");
};

export default someFunction

In any case, you need to keep in mind that Typescript requires you to be explicit of what type of data you're sending as a response. The whole point of having Typescript in a project is to prevent errors by adding type safety checks to the code.

See Everyday Types to learn more.

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