GraphQL：variableValues 中的意外变量：首先在 args 中不使用变量时
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【中文标题】GraphQL：variableValues 中的意外变量：首先在 args 中不使用变量时【英文标题】：GraphQL: unexpected variables in variableValues: first when using no variables in args 【发布时间】：2021-07-26 12:25:42 【问题描述】：我的 GraphQL 查询在 Hasura 客户端中工作得很好，但是当我使用 Apollo 在我的 React 代码中使用查询时无法工作，我不明白为什么，因为我什至没有在查询中使用变量！这是一个返回一些参数的简单查询，仅此而已。
我得到的错误：错误：GraphQL 错误：variableValues 中的意外变量：第一个
查询
query MyQuery
account_ledger
transaction_id
transaction_amount
回复
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App.js
import React from "react";
import useQuery from "@apollo/react-hooks";
import gql from "apollo-boost";
const GET_USERS = gql`
query
account_ledger
transaction_id
transaction_amount
`;
const App = () =>
const loading, error, data = useQuery(GET_USERS,
variables: first: 10 ,
);
if (loading) return <p>Loading...</p>;
if (error)
console.log("error graphql ", error);
return <p>`Error: $error.message`</p>;
console.log(data);
return (
<div className="App">
<p>Hello, World</p>
</div>
);
;
export default App;
index.js
import React from "react";
import ReactDOM from "react-dom";
import ApolloProvider from "@apollo/react-hooks";
import ApolloClient from "apollo-boost";
import InMemoryCache from "apollo-cache-inmemory";
import App from "./App";
// Initialize a new cache
const cache = new InMemoryCache();
// Creating the client
const client = new ApolloClient(
uri: "http://localhost:8080/v1/graphql",
cache,
);
ReactDOM.render(
<ApolloProvider client=client>
<App />
</ApolloProvider>,
document.getElementById("root")
);
【问题讨论】：
您在 useQuery 中使用了变量，这就是您收到错误消息的原因。请参阅 appolo doc 中的示例。您需要两个从useQuery 中删除第二个参数或更改您的查询
【参考方案1】：
您必须执行以下任一操作。这些是
1.当您请求服务器时，您必须删除变量字段。 正如@antoineso 建议的那样。
const loading, error, data = useQuery(GET_USERS, variables: first: 10 , );
把上面的代码改成
const loading, error, data = useQuery(GET_USERS);
在这种情况下，您将从服务器获取所有分类帐信息。
但是，如果您想限制传入客户端的数据量，则必须使用 Hasura 的限制和偏移量。像这样
2。将您的查询定义更改为这样的内容。
const GET_USERS = gql`query ledger_query($limit: Int!, $offset:Int!) account_ledger(limit: $limit, offset: $offset) transaction_id transaction_amount `;
现在，您可以像这样调用您的 graphql 服务器 (Hasura)。
const loading, error, data = useQuery(GET_USERS, variables: limit: 10, offset: 0 , );
做完上述操作后，服务器应该返回前10个account_ledger信息。
如果你不清楚，问我。
【讨论】：
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