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I got the sample called "Feature Layer with ONDEMAND mode" in the ArcGIS for js resource center. This example just adds layer with rivers to the map.

I want to use my own features instead of using features from the featureService like in this example. In order to do this I need to use another constructor of FeatureLayer so I modified the code like this:

  function initOperationalLayer(map) {

    var featureCollection = {
        layerDefinition: {
          "geometryType": "esriGeometryPoint",
          "fields": [
          {
            "name": "OBJECTID",
            "type": "esriFieldTypeOID"
          },
          {
            "name": "text",
            "type": "esriFieldTypeString"
          },
          {
            "name": "address",
            "type": "esriFieldTypeString"
          },
          {
            "name": "Shape",
            "type": "esriFieldTypeGeometry"
          }
          ]
        },
        featureSet: 
        [
        {   OBJECTID : 1, 
            text : 'a', 
            address : 'b', 
            Shape :  new esri.geometry.Point(-80.12468662, 40.42756484, map.spatialReference)
        }
        ]
    };
    var featureLayer = new esri.layers.FeatureLayer(featureCollection, {
        mode: esri.layers.FeatureLayer.MODE_ONDEMAND
    });

    map.addLayer(featureLayer);
    map.infoWindow.resize(150,105);
    mapLayers.push(featureLayer);  //this client side map layer is the maps graphics layer
  }

Unfortunately, it doesn't work. I got errors like "TypeError: _19c is undefined in utils.xd.js(line 14)". It is obfuscated code so i can't understand what't the problem. Any ideas?

The right code is the following one:

    var jsonFS = {
        "displayFieldName": "Name",
        "fieldAliases": {
            "Name": "Name"
        },
        "geometryType": "esriGeometryPoint",
        "spatialReference": {
            "wkid": 4326
        },
        "fields": [{
            "name": "Name",
            "type": "esriFieldTypeString",
            "alias": "Name",
            "length": 255
        }],
        "features": [{
            "attributes": {
                "Name": "CHINA: YUNNAN PROVINCE; VIETNAM: HANOI"
            },
            "geometry": {
                "x": -10602460.248958504,
                "y": 4716882.997019428
            }
        }]
    };
    var fs = new esri.tasks.FeatureSet(jsonFS);

    var featureCollection = {
        layerDefinition: {
          "geometryType": "esriGeometryPoint",
          "fields": [
          {
            "name": "Name",
            "type": "esriFieldTypeString",
            "alias": "Name"
          }
          ]
        },
        featureSet: fs
    };

var featureLayer = new esri.layers.FeatureLayer(featureCollection, {
        mode: esri.layers.FeatureLayer.MODE_ONDEMAND
    });
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90% accept rate
does this code work in another mode like MODE_SNAPSHOT? – CaptDragon Apr 21 '11 at 13:22
No, nothing helps. I tried also to use esri.FeatureSet class instead of this array. I always have errors. – Kirill Lykov Apr 21 '11 at 13:42
Do you have a a public link to the code you are trying to run? – Sasa Ivetic Apr 21 '11 at 14:10
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3 Answers

up vote 1 down vote accepted

'featureCollection' expects a 'features' attribute which is a FeatureSet, and not a featureSet attribute like you are doing:

var featureCollection = {
    layerDefinition: {
      "geometryType": "esriGeometryPolyline",
      "fields": [
          {
            "name": "OBJECTID",
            "type": "esriFieldTypeOID"
          },
          {
            "name": "text",
            "type": "esriFieldTypeString"
          },
          {
            "name": "address",
            "type": "esriFieldTypeString"
          }
      ]
    },
    features: 
    [
        {
            "attributes": {
                OBJECTID : 1, 
                text : 'a', 
                address : 'b', 
            },
            "geometry": { "x": -80.12468662, "y": 40.42756484 }
        }
    ]
};

For future debugging, I suggest copying the ESRI obfuscated code, and making it more readable by using JS Beautifier. Then just search for the error (in my case error was with variable _190). That should help you out with figuring out where and why the error occurs.

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Not exactly but more or less right, thank you for the JS Beautifier - I'm new in js so didn't know about this. – Kirill Lykov Apr 21 '11 at 14:45
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up vote 1 down vote

You could try moving the spatial reference in the layer definition:

...
  "spatialReference" : {
    "wkid" : 4326
  }
...

And adding quotes around field names and values, and defining the geometry JSON style:

...  
{   
    "OBJECTID" : 1, 
    "text" : "a", 
    "address" : "b", 
    "geometry" : {
      "x" : -80.12468662,
      "y" : 40.42756484
    }
 }
...

I got inspired by JSON response to querying a feature service e.g.: http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Earthquakes/Since_1970/MapServer/0/query?text=&geometry=&geometryType=esriGeometryPoint&inSR=&spatialRel=esriSpatialRelIntersects&relationParam=&objectIds=&where=MAGNITUDE%3E7&time=&returnIdsOnly=false&returnGeometry=true&maxAllowableOffset=&outSR=&outFields=&f=pjson

Good luck.

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it is not this way you described, but anyway thank you for this json - it helped me to find solution. – Kirill Lykov Apr 21 '11 at 14:43
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up vote 0 down vote

maybe it's expecting the alias? Give it a shot.

...
"fields": [
          {
            "name": "OBJECTID",
            "type": "esriFieldTypeOID",
            "alias": "ID"
          },
...
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