topic Feature Layers do not have all attributes in ArcGIS API for Flex Questions

Feature Layers do not have all attributes

BryanLin — Tue, 12 Oct 2010 14:12:52 GMT

can anyone answer why a feature layer's graphics providers' attributes does not contain all of the layer's attributes unless it's queried?

var features:ArrayCollection = ArrayCollection(featureLayer.graphicProvider);
var featureSet:FeatureSet = new FeatureSet(features.source);

featureSet.attributes would only have fields : ObjectID, Shape, and STFIPS. I want to be able to grab all of the attributes from the feature layer, but it seems the only way is to query the feature layer. is there another way because it seems that querying for each feature would take a performance hit.

Re: Feature Layers do not have all attributes

DasaPaddock — Tue, 12 Oct 2010 16:27:48 GMT

Have you set the outFields?
http://help.arcgis.com/en/webapi/flex/apiref/com/esri/ags/layers/FeatureLayer.html#outFields

Re: Feature Layers do not have all attributes

BryanLin — Tue, 12 Oct 2010 17:11:55 GMT

Have you set the outFields?
http://help.arcgis.com/en/webapi/flex/apiref/com/esri/ags/layers/FeatureLayer.html#outFields

Yes i had that too. It still returns only objectid, shape,and stfips.

Re: Feature Layers do not have all attributes

DasaPaddock — Tue, 12 Oct 2010 17:20:08 GMT

Can you post a test case? It sounds like your code is correct, but you may want to contact ESRI Tech Support to see if there's a bug here.

Re: Feature Layers do not have all attributes

BryanLin — Tue, 12 Oct 2010 17:36:20 GMT

Can you post a test case? It sounds like your code is correct, but you may want to contact ESRI Tech Support to see if there's a bug here.

var featureLayer:FeatureLayer = new FeatureLayer("http://myserver/arcgis/rest/services/Example/MapServer")
var features:ArrayCollection = ArrayCollection(featureLayer.graphicProvider);
var featureSet:FeatureSet = new FeatureSet(features.source)

//find the attributes of the feature set
for each(var attribute:Object in featureSet.attributes)
{
trace("attribute : " + attribute");
}

i believe you can also get the attribute names with:
for (var attributeName:Object in featureSet.attributes)
{
trace("attribute name: " + attributeName + " : " + featureSet.attributes[attributeName]);
}

Re: Feature Layers do not have all attributes

DasaPaddock — Tue, 12 Oct 2010 17:47:39 GMT

The FeatureLayer url should be to a layer in the map service. e.g.,
http://myserver/arcgis/rest/services/Example/MapServer/0

Also, FeatureSet.attributes is an Array of Objects, so you need an inner loop to pull out the values of the attributes for each feature in the FeatureSet.
http://help.arcgis.com/en/webapi/flex/apiref/com/esri/ags/FeatureSet.html#attributes