Respond to Airbnb's own markers: markers successfully disappear, but do not reappear

Question

I am currently creating an app with adaptive support and am using the Airbnb map plugin to dynamically display markers. My tokens are loaded from the firebase database successfully, and the loaded array always shows the correct content. I have the full code here just in case https://codepen.io/yeni/pen/Kqyrxv?editors=0010 :)

Whenever I change the property of a cur_usermarker to 1, it does not appear on the map. However, when I change cur_userto 0, the marker is not displayed (this would be the desired behavior). My code is as follows:

    //Store file MarkersStore.js
    class MarkersStore {
  @observable markers = [];

  constructor() {
      console.log("Started downloading markers");
      var localMarkers = [];
      Fb.bikes.on('value', (snap) => {
        localMarkers = [];
        snap.forEach((marker) => {
            localMarkers.push({
              longitude: parseFloat(marker.val().positionLng),
              latitude: parseFloat(marker.val().positionLat),
              description: "Bike 1",
              title: "b" + String(marker.val().bike_no),
              bike_no: marker.val().bike_no,
              cur_user: marker.val().current_user,
              key: marker.getKey()
            })
        });
        //Once must make sure that the upper command already finished executing!
        this.markers.replace(localMarkers);
        console.log("Loaded markers");
      });
  }

}

    ...
    //Rendering file MarkersComponent.js
    render() {
    var renderingMarkers = this.fbMarkers.markers.slice() || [];
    console.log("fbMarkers are: ");
    console.log(this.fbMarkers.markers.slice());
    console.log("Rendering stuff..");
    console.log(renderingMarkers);
    console.log("Rendering ALL the stuff!");
    return (<View>
      {renderingMarkers.map( (marker) => {
        console.log("Markers are re-rendered");
        console.log(marker.bike_no);
        console.log(marker.cur_user);
        //All console logs up until here show correct results
          return (
            <View key={marker.bike_no}>{ (marker.cur_user == 0) ?
              <MapView.Marker
            navigator={this.props.navigator}
            key={marker.bike_no}
            coordinate={{longitude: marker.longitude, latitude: marker.latitude}}
            title={marker.title}
            description={marker.description}
            onPress={(coord, pos) => this.startBookingBike(marker.bike_no)}
            ><View style={styles.bikeRadius}><View style={styles.bikeMarker}>
            </View></View>
            </MapView.Marker> : null
          }</View>
          );
    })}</View>)
  }

, , ( ). - , ?

** ** github, . !:) https://github.com/airbnb/react-native-maps/issues/1426

Answer 1

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, :

return (
            <View key={marker.bike_no}>
            { <MapView.Marker
            navigator={this.props.navigator}
            coordinate={{longitude: marker.longitude, latitude: marker.latitude}}
            title={marker.title}
            description={marker.description}
            onPress={(coord, pos) => this.startBookingBike(marker.bike_no)}
            key={marker.key}
            ><View style={(marker.cur_user == 0) ? styles.bikeRadius : styles.markerStyleHidden }><View style={styles.bikeMarker}>
            </View></View>
            </MapView.Marker>
          }</View>
          );

, :

markerStyleHidden: {
    height: 0,
    width: 0,
    borderRadius: 0,
    overflow: 'hidden',
    backgroundColor: 'rgba(0, 122, 255, 0.5)',
    borderWidth: 0,
    borderColor: 'rgba(0, 122, 255, 0.5)',
    alignItems: 'center',
    justifyContent: 'center'
  },
  radius: {
    height: 30,
    width: 30,
    borderRadius: 30 / 2,
    overflow: 'hidden',
    backgroundColor: 'rgba(0, 122, 255, 0.5)',
    borderWidth: 4,
    borderColor: 'rgba(0, 122, 255, 0.5)',
    alignItems: 'center',
    justifyContent: 'center'
  },