我已经能够使用express-graphql制作一个简单的graphql服务器。
在http://localhost:8080/graphql
中查询:
{
grocers {
_id
name
description
location
},
products(grocerId: "585676ef987ed341fed7fdd2") {
name
}
}
我得到以下内容:
{
"data": {
"grocers": [
{
"_id": "58567074987ed341fed7fcb1",
"name": "Martina",
"description": "Las mejores verduras de la alpujarra",
"location": "Ugíjar"
},
{
"_id": "585676ef987ed341fed7fdd2",
"name": "Antonio",
"description": "Leña y calorcito para todos!",
"location": "Ugíjar"
}
],
"products": [
{
"name": "Concierto de guitarra"
}
]
}
}
到目前为止一切顺利。现在我想从React Native查询。我一直在尝试与Apollo客户端这样做。现在,我已经能够按照他们的文档中的说明查询vanilla方法,并且我得到了正确的结果。
但现在我正在努力用反应阿波罗工具来做这件事,如http://dev.apollodata.com/react/所述。这是代码:
// ...
const networkInterface = createNetworkInterface({ uri: 'http://localhost:8080/graphql' });
const client = new ApolloClient({
networkInterface
});
class Alpuzon extends Component {
constructor() {
super(...arguments);
}
_renderScene(route, navigator) {
if (route.id === 1) {
return <AlpuzonPage navigator={navigator} />
} else if (route.id === 2) {
return <PageTwo navigator={navigator} />
}
return false;
}
_configureScene() {
return Navigator.SceneConfigs.FloatFromRight;
}
render() {
return (
<ApolloProvider client={client}>
<Navigator
initialRoute={{ id: 1 }}
renderScene={this._renderScene}
configureScene={this._configureScene}
/>
</ApolloProvider>
);
}
}
// ...
let AlpuzonPage = React.createClass({
_handlePress() {
this.props.navigator.push({id: 2});
},
render() {
const getGrocersQuery = gql`query getGrocersQuery { grocers { name } }`;
class GrocerListView extends Component {
render() {
<ListView
dataSource={data.grocers}
renderRow={(obj) => <Text>{obj.name}</Text>}
/>
}
}
GrocerListView.propTypes = {
data: PropTypes.shape({
loading: PropTypes.array.isRequired,
grocers: PropTypes.array
}).isRequired
};
const GrocerListViewWithData = graphql(getGrocersQuery)(GrocerListView);
return (
<View style={{ flex: 1, flexDirection: 'column'}}>
<GrocerListView />
</View>
);
}
});
...我不知道阿波罗究竟是如何工作的,我也是React Native和GraphQl的新手,所以基本上我已经相当失落了。文档对我没什么帮助:/
答案 0 :(得分:1)
GrocerListViewWithData
但仅在GrocerListView
中使用AlpuzonPage
。GrocerListView
中,您应该访问this.props.data
而不是data
,而且还必须等待this.props.data.loading
完成加载这是更新的代码:
let AlpuzonPage = React.createClass({
_handlePress() {
this.props.navigator.push({id: 2});
},
render() {
return (
<View style={{ flex: 1, flexDirection: 'column'}}>
<GrocerListViewWithData />
</View>
);
}
});
class GrocerListView extends Component {
render() {
if (this.props.data.loading) {
return (<div>Loading</div>)
}
<ListView
dataSource={this.props.data.grocers}
renderRow={(obj) => <Text>{obj.name}</Text>}
/>
}
}
GrocerListView.propTypes = {
data: PropTypes.shape({
loading: PropTypes.array.isRequired,
grocers: PropTypes.array
}).isRequired
};
const getGrocersQuery = gql`query getGrocersQuery { grocers { name } }`;
const GrocerListViewWithData = graphql(getGrocersQuery)(GrocerListView);
如果您想尝试使用Apactlo的React Native的工作示例,请检查Learn Apollo,还有一个React Native和一个Exponent JS轨道:)