在react-native中使用“apolloClient”通过“useQuery”加载数据时,“loading”保持为true

kzmpq1sx  于 2023-02-16  发布在  React
关注(0)|答案(4)|浏览(129)

我尝试在React Native中使用Apollo Client useQuery获取数据,但loading在真实状态下挂起,无法获取data
下面是实际代码。
App.js

import React from 'react';

import { SafeAreaView, Text, View } from 'react-native';

import { ApolloClient, ApolloProvider, InMemoryCache, gql, useQuery } from '@apollo/client';

const EXCHANGE_RATES = gql`
    query GetExchangeRates {
        rates(currency: "USD") {
            currency
            rate
        }
    }
`;

const TestScreen = () => {
    const { loading, error, data } = useQuery(EXCHANGE_RATES);

    console.log(loading, error, data); // Stop at "true undefined undefined" 🥲

    if (loading) return <Text>Loading...</Text>;
    if (error) return <Text>Error :(</Text>;

    return data.rates.map(({ currency, rate }) => (
        <View key={currency}>
            <Text>
                {currency}: {rate}
            </Text>
        </View>
    ));
};

const apolloClient = new ApolloClient({
    // this uri is the uri provided by the apolloClient official documentation.
    // https://www.apollographql.com/docs/react/get-started#3-connect-your-client-to-react
    uri: 'https://48p1r2roz4.sse.codesandbox.io',
    cache: new InMemoryCache(),
});

const App = () => {
    return (
        <ApolloProvider client={apolloClient}>
            <SafeAreaView>
                <TestScreen />
            </SafeAreaView>
        </ApolloProvider>
    );
};

export default App;

package.json

{
    ...,
    "dependencies": {
        "@apollo/client": "^3.5.10",
        "graphql": "^16.4.0",
        "react": "17.0.2",
        "react-native": "0.68.1",
        "react-native-flipper-apollo-devtools": "^0.0.2"
    },
    "devDependencies": {
        "@babel/core": "^7.12.9",
        "@babel/runtime": "^7.12.5",
        "@graphql-codegen/cli": "^2.6.2",
        "@graphql-codegen/fragment-matcher": "^3.2.1",
        "@graphql-codegen/typed-document-node": "^2.2.8",
        "@graphql-codegen/typescript": "^2.4.8",
        "@graphql-codegen/typescript-apollo-client-helpers": "^2.1.15",
        "@graphql-codegen/typescript-operations": "^2.3.5",
        "@react-native-community/eslint-config": "^2.0.0",
        "@types/jest": "^26.0.23",
        "@types/react-native": "^0.67.3",
        "@types/react-test-renderer": "^17.0.1",
        "@typescript-eslint/eslint-plugin": "^5.17.0",
        "@typescript-eslint/parser": "^5.17.0",
        "babel-jest": "^26.6.3",
        "babel-plugin-module-resolver": "^4.1.0",
        "eslint": "^7.32.0",
        "eslint-config-prettier": "^8.5.0",
        "eslint-config-standard-with-typescript": "^21.0.1",
        "eslint-plugin-import": "^2.26.0",
        "eslint-plugin-node": "^11.1.0",
        "eslint-plugin-promise": "^6.0.0",
        "eslint-plugin-react": "^7.29.4",
        "eslint-plugin-react-hooks": "^4.5.0",
        "eslint-plugin-react-native": "^4.0.0",
        "husky": "^7.0.4",
        "jest": "^26.6.3",
        "lint-staged": "^12.4.1",
        "metro-react-native-babel-preset": "^0.67.0",
        "react-native-flipper": "^0.144.0",
        "react-test-renderer": "17.0.2",
        "typescript": "^4.4.4"
    },
    "resolutions": {
        "@types/react": "^17"
    },
    "jest": {
        "preset": "react-native",
        "moduleFileExtensions": [
            "ts",
            "tsx",
            "js",
            "jsx",
            "json",
            "node"
        ]
    }
}

预期成果:

运行useQuery()之后

loading = true, error = undefined, data = undefined
                    ↓
loading = false, error = undefined, data = { ... }

实际结果:

运行useQuery()之后

loading = true, error = undefined, data = undefined (Stuck at 'loading = true' 🥲)

我不知道出了什么问题。任何帮助都将不胜感激。

jbose2ul

jbose2ul1#

版本3.6使用来自React 18的useSyncExternalStore API实现useQuery。由于expo目前支持React 17,您可以通过将@apollo/client降级到版本3.5.4和将graphql降级到版本^16.3.0来解决此问题。您可以找到更多信息here

zlhcx6iw

zlhcx6iw2#

不幸的是,这是一个已知的bug,发生在apollo客户端3. 6中,上一个正常工作的版本是3. 5. 10,之后useQuery和useLazyQuery停止工作(加载时卡住),但只在移动的设备/模拟器上,web版本仍然正常工作,尝试降级到3. 5. 10。
https://github.com/apollographql/apollo-client/issues/9689
编辑:新的alpha版本解决了这个问题(3.7.0-beta.3)。
尝试:npm i @apollo/client@beta

vojdkbi0

vojdkbi03#

从@Dominik Myszkowski升级到新的alpha版本(3.7.0-beta.3)修复了我的问题,降级到3.5.4没有。

pjngdqdw

pjngdqdw4#

对我来说,解决这个问题的方法是将styled-react-modal^2.1.0降级到^1.2.3
不知道为什么,只是它使用了一个靠近组件树顶部的提供程序。
更新:将styled-react-modal升级到^3.0.1也很有效。

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