How to get graphics from FeatureLayer JS 4.0beta?

nita14

Hello,

Does anybody know how to get graphics (ie, fields values) from FeatureLayer? After having added feature service to the SceneView, featureLayer.graphics.length  returns 0.

Thanks

Adam

KristianEkenes

Hi Adam and Adam,

The documentation on this is misleading and, in the cases you both brought up, contradictory. The reason for this is because the way these workflows are being designed has been changing and will continue to change as 4.0 progresses through multiple betas into the final product. The documentation reflects some of these changes over time, but isn't consistent with how things are now. We are updating it so that it will not be as confusing.

featureLayer.graphicsCollection does not exist. The Migration page in the guide is wrong and will be updated soon. featureLayer.graphics exists, but as the original post mentions, doesn't actually do anything. This too will likely go away and accessing graphics on the view will change in the future. Stay tuned for documentation updates explaining this. There are a number of reasons featureLayer.graphics will no longer be used, the primary reason being that features are no longer rendered on the layer or the map; rather, they are rendered in the LayerView and View. This is a major difference between our 3.x and 4.x APIs, so keep a look out for updated documentation, blogs, etc that go into greater depth explaining these concepts and classes.

In the interim you can access the graphics displayed in the view via the 'graphics-controller-create' event on the featureLayer. This is undocumented, but will be later. The event object has a graphicsController property, which is an object that has a graphicsCollection property. See this jsbin for an example of accessing the graphics using one of our existing samples: JS Bin - Collaborative JavaScript Debugging

I hope this helps!