topic Re: AGSFeatureTable fieldForName returns error if not found in ArcGIS Runtime SDK for iOS Questions

AGSFeatureTable fieldForName returns error if not found

MichaelDavis3 — Tue, 02 Jun 2020 00:25:43 GMT

Correct me if I'm wrong but the docs for AGSFeatureTable fieldForName indicate that the return value is a nullable AGSField, however if I request a field that does not exist it errors with the following:

ArcGIS Runtime Error Occurred. Set a breakpoint on C++ exceptions to see the original callstack and context for this error: Error Domain=com.esri.arcgis.runtime.error Code=3017 "The requested field was not found." UserInfo={NSLocalizedFailureReason=platform position is not a field name., NSLocalizedDescription=The requested field was not found., Additional Message=platform position is not a field name.}

C++ breakpoint doesn't return anything helpful.

Docs here:

ArcGIS Runtime SDK for iOS: AGSFeatureTable Class Reference

Shouldn't this return NULL if the field isn't found? How should I determine if a given field name exists in an AGSFeatureTable without iterating through every field in AGSFeatureTable.fields?

Re: AGSFeatureTable fieldForName returns error if not found

Nicholas-Furness — Tue, 02 Jun 2020 16:34:50 GMT

You can safely ignore the exception. It doesn't propagate up out of the Runtime, it's merely logged to the console (I suspect we should hide that logging - I'll raise this with the team).

The result you get back from the fieldForName() call is still nil, right?

If Xcode is stopping, you should remove any breakpoints on C++ exceptions.

Does that help?

Nick.

Re: AGSFeatureTable fieldForName returns error if not found

MichaelDavis3 — Tue, 02 Jun 2020 17:21:10 GMT

Yeah it's only a show stopper if the feature table isn't loaded... which turns out was the larger issue I needed to deal with. I'm mid-way through upgrading a large and (to me anyway) complex app from 10.x to 100.x so the C++ breakpoints are helping me catch all the spots where I missed bits in the initial flurry of finding and replacing.