我有一个App
组件,我将其包装到apollo提供程序中:
import React, { Component } from "react";
import { observer, Provider } from "mobx-react";
import { BrowserRouter as Router } from "react-router-dom";
import styled from "styled-components";
import { ThemeProvider } from "styled-components";
// graphQL
import { ApolloClient } from "apollo-client";
import { createHttpLink } from "apollo-link-http";
import { setContext } from "apollo-link-context";
import { InMemoryCache } from "apollo-cache-inmemory";
import Main from "./components/Main/Main";
import Navigation from "./components/Navigation/Navigation";
import { ApolloProvider } from "react-apollo";
const httpLink = createHttpLink({
uri: "myUri"
});
const authLink = setContext((_, { headers }) => {
// get the authentication token from local storage if it exists
const token = "myToken";
// return the headers to the context so httpLink can read them
return {
headers: {
...headers,
authorization: token ? `Bearer ${token}` : null
}
};
});
const mozaikClient = new ApolloClient({
link: authLink.concat(httpLink),
cache: new InMemoryCache()
});
@observer
class App extends Component {
render() {
return (
<ThemeProvider theme={theme}>
<ApolloProvider client={mozaikClient}>
<Provider {...this.props.stores}>
<Router>
<div className="app-container">
<Navigation />
<Main />
</div>
</Router>
</Provider>
</ApolloProvider>
</ThemeProvider>
);
}
}
export default App;
然后我有我想要使用提供者数据的About组件:
import React, { Component } from "react";
import { gql, graphql } from "react-apollo";
class About extends Component {
render() {
return <div>About component.</div>;
}
}
const landingPageQuery = gql`
query landingPage {
documents(types: [LANDING]) {
items {
id
... on LandingDocument {
landingPortrait {
id
url
}
greeting
content
}
}
}
}
`;
export default graphql(landingPageQuery)(About);
我收到以下错误:
About.js:10 Uncaught TypeError:Object(...)不是函数 at Object ../ src / components / About / About.js(About.js:10) 在 webpack_require (bootstrap 9e0e85e19ef23447e3e2:669) 在fn(bootstrap 9e0e85e19ef23447e3e2:87) at Object ../ src / components / Main / routes.js(routes.js:1) 在 webpack_require (bootstrap 9e0e85e19ef23447e3e2:669) 在fn(bootstrap 9e0e85e19ef23447e3e2:87) at Object ../ src / components / Main / Main.js(Contact.js:4) 在 webpack_require (bootstrap 9e0e85e19ef23447e3e2:669) 在fn(bootstrap 9e0e85e19ef23447e3e2:87) at Object ../ src / App.js(zen-observable.js:498) 在 webpack_require (bootstrap 9e0e85e19ef23447e3e2:669) 在fn(bootstrap 9e0e85e19ef23447e3e2:87) at Object ../ src / index.js(Skills.js:4) 在 webpack_require (bootstrap 9e0e85e19ef23447e3e2:669) 在fn(bootstrap 9e0e85e19ef23447e3e2:87) 在Object.0(styleVariables.js:17) 在 webpack_require (bootstrap 9e0e85e19ef23447e3e2:669) 在bootstrap 9e0e85e19ef23447e3e2:715 在bundle.js:719
此错误的来源和原因来自何处,这是什么意思?它指向我使用gql
答案 0 :(得分:9)
这似乎是一个已知问题 - 请参阅here。
尝试安装graphql-tag
并从此库中导入gql
。
答案 1 :(得分:3)
如果您中的某些人仍然遇到相同的问题,请尝试使用apollo-boost
import { gql } from 'apollo-boost'
答案 2 :(得分:2)
删除大括号。
代替:
import { gql } from 'graphql-tag';
做
import gql from 'graphql-tag';