React Native graphql查询,中继无法正常工作

时间:2016-08-18 08:52:26

标签: reactjs react-native graphql relayjs

我有点迷失这个问题,所以任何帮助都将不胜感激!所以这是我想发送的查询:

query {
  viewer{
    search_places(lat: "40.7127", lng: "-74.0059", searchType:"all", searchTerm:"shopping"){
      edges{
        node{
          id,
          name, 
          lat,
          lng
        }
      }
    }
  }
}

到目前为止一直这么好,当我在GraphiQL上尝试时,这个查询正在运行。此查询返回PlaceConnection对象。现在我尝试在React Native with Relay上实现相同的功能:

class SearchPlacesRoute extends Route {
  static paramDefinitions = {
    lat        : { required: true },
    lng        : { required: true },
    searchType : { required: true },
    searchTerm : { required: true }
  }
  static queries = {
    search_places: () => Relay.QL`
      query {
        viewer{
          search_places(lat: $lat, lng: $lng, searchType: $searchType, searchTerm: $searchTerm) 
        }
      }
      `
  }
  static routeName = 'SearchPlacesRoute'
}

class SearchPlacesComponent extends Component {
  render () {
    const places = this.props.search_places;
    console.log(places);
    for (var index = 0; index < places.length; index++) {
        var element = places[index];
        console.log(element);
      }
    return (
      <View>
        <Text>email: {places[0].name}</Text>
      </View>
    )
  }
}

SearchPlacesComponent = Relay.createContainer(SearchPlacesComponent, {
  fragments: {
    search_places: () => Relay.QL`
      fragment on PlaceConnection {
          edges 
          {
            node 
            {
              id,
              name,
              lat,
              lng
            }
          }
        }
      `
  }
}) 

<RootContainer
  Component={SearchPlacesComponent}
  route={new SearchPlacesRoute({lat:"40.7127", lng: "-74.0059", searchType:"all",searchTerm: "shopping"})}
  renderFetched={(data) => <SearchPlaces {...this.props} {...data} />}/>

但是当我尝试使用此方法获取数据时,我收到以下错误:

1. Objects must have selections (field 'search_places' returns PlaceConnection but has no selections)
       _search_places40zPNn:search_places(lat:"40.7127",lng:"-7
       ^^^
2. Fragment F0 on PlaceConnection can't be spread inside Viewer
       ...F0
       ^^^

所以我检查了实际发送到服务器的内容: enter image description here

在我看来,片段是作为单独的查询而不是选择发送的。知道为什么会发生这种情况或者我该如何避免这种行为?

修改

这是我的最终代码 - 希望它对某些人有所帮助: https://gist.github.com/adamivancza/586c42ff8b30cdf70a30153944d6ace9

1 个答案:

答案 0 :(得分:2)

我认为问题在于你的接力路线太深了。而是将您的路线定义为仅针对viewer进行查询:

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

然后,在您的组件内部,将其定义为fragment on viewer,而不是PlaceConnection

SearchPlacesComponent = Relay.createContainer(SearchPlacesComponent, {
  initialVariables: { lat: "..." /* TODO */ },
  fragments: {
    viewer: () => Relay.QL`
      fragment on viewer {
        search_places(lat: $lat, lng: $lng, searchType: $searchType, searchTerm: $searchTerm) {
            edges 
            {
              node 
              {
                id,
                name,
                lat,
                lng
              }
            }
          }
        }
      `
  }
}) 

您需要移动变量($lag$lng等)以定义为容器的一部分,而不是定义为路径的一部分。但我认为应该解决你的问题。