AnsweredAssumed Answered

Make layer re-render?

Question asked by tristan.sebens on Oct 28, 2017
Latest reply on Oct 29, 2017 by tristan.sebens

I'm not sure if this is the most prudent way to go about this, so feel free to critique my code structure as well.


Okay, long story short, I have about a feature service that has tens of thousands of features. I only want the features contained within the current camera extent to be displayed, so:

  • I've created a feature layer from the REST service URL. I call this the 'internal' feature layer.
  • I've also created a corresponding 'wrapper' layer which 'wraps' around the internal feature layer.
  • This wrapper layer is what will be displayed on the map, and it's source will be set to the result of a query executed on the feature layer. It's sort of like the internal layer is a database table, and the wrapper layer is a view of that table.

So anytime the camera changes, I tell the wrapper layer to execute a query on its internal layer based on the current extent of the view. So far, so good. This all works in the code.


Here's the problem: The features aren't drawing. I've printed the JSON of the wrapper layer to the console, so I know that the source of the wrapper layer has been set to the result of the query correctly, but...


The features don't have symbols. 'symbol: null'


The internal layer has a Unique Value renderer that was built from the REST service, and when I create the wrapper layer I pass this render to the wrapper layers. I know that this renderer is present in the wrapper layer at the time of the query.

I can't figure out why the wrapper layer is not using it's renderer to generate symbols for the features, so I'm wondering if there is a function call that I need to make in order to make the layer redraw itself and use its renderer to generate the proper symbols.


Any thoughts or wisdom is appreciated.