circlemarkers do not update

[chrisluedtke]

When mapping many points as circleMarkers, my features fail to update. I suspect this is because the circleMarkers can't be identified or associated to the GeoJSON features. The error in the console is TypeError: Cannot read property 'hasOwnProperty' of undefined.

Example data:

[{
    "type": "Feature", 
    "properties": {
        "color": "#522398", 
        "rn": "503"
    }, 
    "geometry": {
        "type": "Point", 
        "coordinates": [-87.68962, 42.07125]
    }
}, {
    "type": "Feature", 
    "properties": {
        "color": "#522398", 
        "rn": "515"
    }, 
    "geometry": {
        "type": "Point", 
        "coordinates": [-87.68551, 42.0638]
    }
}]

Javascript:

var mymap = L.map('map').setView([41.8759, -87.6251], 11);

var realtime = L.realtime({
        url: 'http://localhost:5000/get_trains',
        crossOrigin: true,
        type: 'json'
    }, {
        interval: 5 * 1000,
        pointToLayer: function (feature, latlng) {
            return L.circleMarker(latlng, {
                // Stroke properties
                color: feature.properties.color,
                opacity: 0.75,
                weight: 2,

                // Fill properties
                fillColor: feature.properties.color,
                fillOpacity: 0.5,

                radius: 5
            })
        },
        getFeatureId: function(feature) {
            return feature.properties.rn;
        },
    }).addTo(mymap);

L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', {
    attribution: '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
}).addTo(mymap);

realtime.on('update', function() {});

[perliedman]

Hi, could you please either provide a running example illustrating the issue, or at least a stacktrace showing where the error occurs?