Field parameter in Modelbuilder - empty?

Question

I have built a model, as input parameter I have a 2 parameters: a Feature Layer and a Field But when I run the model, the Field-Parameter has no values to select. How can I tell the model builder, that I want the Fields from the selected Feature Layer as values in the Field parameter?

• PolyGeo: I would look into tool validation. I think you can use this with tools authored using ModelBuilder and not just Python script tools but I am happy to be corrected. Actually I think it is an Obtained from option when you are setting Parameters on the Model Properties but tool validation is useful to know about.

Answer 1

Sounds like you want to derive a field from a layer, this can only be done in a script tool, it is discussed here. You will need to convert the logic of the model into python code.