1

我正在尝试使用 Relay 设置我的应用程序，并按照此 GitHub 问题react-navigation中讨论的提示进行操作。另请注意，我曾经创建项目。create-react-native-app

这是我的设置的样子：

应用程序.js

Relay.injectNetworkLayer(
  new Relay.DefaultNetworkLayer('https://api.graph.cool/relay/v1/ciyeih9590fhl0162e5zh1z4h', {
    headers: {
    },
  })
)

const RootNavigationStack = StackNavigator({
  PokemonList: {
    screen: PokemonList
  }
})

export default class App extends React.Component {
  render() {
    return <RootNavigationStack />
  }
}

PokemonList.js

class IndexRoute extends Route {
  static queries = {
    viewer: () => Relay.QL`query { viewer }`
  }
  static routeName = 'IndexRoute'
}

export default class PokemonList extends React.Component {

  render() {    
    return (
      <Relay.RootContainer
        Component={PokemonListRelayContainer}
        route={new IndexRoute()}
        renderFetched={(data) => {
          console.log('PokemonList - renderFetched', data)
          return <Text>Test</Text>
        }}
      />
    )
  }

}

const PokemonListRelayContainer = Relay.createContainer(PokemonList, {
  fragments: {
    viewer: () => Relay.QL`
      fragment on Viewer {
        id
        allPokemons(first: 10) {
          edges {
            node {
              id
              name
            }
          }
        }
      }
    `
  }
})

renderFetched正在执行日志记录语句，但由于某种原因data是空的：

PokemonList - renderFetched {"viewer":{"__dataID__":"viewer-fixed","__fragments__":{"0::client":[{}]}}}

知道我在这个设置中缺少什么吗？

4

1 回答 1

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我自己解决了这个问题，所以PokemonList作为我的根组件，显然无法访问所请求的数据——尽管我认为它实际上已加载，但由于 Relay 的数据屏蔽对组件不可见。

我想出的解决方案是包装PokemonList在另一个组件中，该组件将渲染Relay.RootContainer然后从那里使用我的传统中继设置。

这就是它现在的样子：

PokemonListWrapper.js

class PokemonListWrapper extends React.Component {    
  render() {
    return (
      <Relay.RootContainer
        Component={PokemonList}
        route={new IndexRoute()}
        renderFetched={data => <PokemonList {...this.props} {...data}/>}        
      />
    )
  }    
}

口袋妖怪列表.js

class PokemonList extends React.Component {

  render() {
    return (
      <ScrollView>
        {this.props.viewer.allPokemons.edges.map(pokemonEdge => (
          <Text key={pokemonEdge.node.id}>{pokemonEdge.node.name}</Text>
        ))}
      </ScrollView>
    )
  }

}

export default Relay.createContainer(PokemonList, {
  fragments: {
    viewer: () => Relay.QL`
      fragment on Viewer {
        id
        allPokemons(first: 10) {
          edges {
            node {
              id
              name
            }
          }
        }
      }
    `
  }
})

应用程序.js

Relay.injectNetworkLayer(
  new Relay.DefaultNetworkLayer('https://api.graph.cool/relay/v1/ciyeih9590fhl0162e5zh1z4h')
)

export class IndexRoute extends Route {
  static queries = {
    viewer: () => Relay.QL`query { viewer }`
  }
  static routeName = 'IndexRoute'
}

const RootNavigationStack = StackNavigator({
  PokemonList: {
    screen: PokemonListWrapper
  }
})

export default class App extends React.Component {
  render() {
    return (
      <RootNavigationStack />
    )
  }
}

于 2017-03-29T13:42:33.607 回答