Javascript Nextjs 中使用 getServerSideProps 的动态 API 路由

发布于04月25日

我想在输入状态为submit之后获取动态API路由.但我不知道如何将状态从react传递到getServerSideProps.

这是我的密码

export default function Home(props) {
    const { data } = props;
    const [input, setInput] = useState("");
    const handlerChange = (event) => {
        setInput(event.target.value);
    };
    const handlerSubmit = () => {
        console.log(event.target.value);
        setInput("");
    };

    return (
        <input
            type="text"
            className="form-control"
            placeholder="Group Name"
            value={input}
            onChange={handlerChange}
            onKeyDown={(event) =>
                event.key === "Enter" && handlerSubmit(event)
            }
        />
    )

export async function getServerSideProps() {
    const res = await fetch(`http://localhost:3000/api/searchGroup/${input}`)
    const data = await res.json()
  
    return { props: { data } }
}

推荐答案

您应该在handlerSubmit回调中使用客户端更新的input值发出请求，并将data保存在状态变量(例如dataToRender)中.

const getData = async (input) => {
    const res = await fetch(`http://localhost:3000/api/searchGroup/${input}`)
    return res.json()
}

export default function Home(props) {
    const { data } = props;
    const [dataToRender, setDataToRender] = useState(data);
    const [input, setInput] = useState("");

    const handlerChange = (event) => {
        setInput(event.target.value);
    };

    const handlerSubmit = async (event) => {
        setInput("");
        const newData = await getData(event.target.value);
        setDataToRender(newData);
    };

    return (
        <input
            type="text"
            className="form-control"
            placeholder="Group Name"
            value={input}
            onChange={handlerChange}
            onKeyDown={(event) =>
                event.key === "Enter" && handlerSubmit(event)
            }
        />
    )
}

作为上述方法的替代方法，如果您绝对需要将请求输入getServerSideProps，那么您可以将input值作为查询参数传递，并从context.query.input输入getServerSideProps读取它.

// On the client-side
import { useRouter } from "next/router";

export default function Home(props) {
    const router = useRouter()    

    const handlerSubmit = () => {
        console.log(event.target.value);
        setInput("");
        router.push(`${router.pathname}?input=${event.target.value}`);
    }
    
    // Remaining code...
}

// On the server-side
export async function getServerSideProps(context) {
    const res = await fetch(`http://localhost:3000/api/searchGroup/${context.query.input ?? 'default-value'}`)
    const data = await res.json()
  
    return { props: { data } }
}