topic Why does setAttributeToNullForKey: remove the key from AGSGDBFeature? in ArcGIS Runtime SDK for iOS Questions https://community.esri.com/t5/arcgis-runtime-sdk-for-ios-questions/why-does-setattributetonullforkey-remove-the-key/m-p/705635#M6313 <HTML><HEAD></HEAD><BODY><P>I am trying to update an existing record on the client database. &nbsp;The existing&nbsp;record has a uuidtext column with an existing value, and&nbsp;I want to remove that value and set the record's column to null. To accomplish this I am grabbing the original record from the table as an AGSGDBFeature, and then updating the keys using setAttributeToNullForKey:.&nbsp;&nbsp;&nbsp;&nbsp;</P><P></P><P>What I have found is that when I send setAttributeToNullForKey: to AGSGDBFeature, the method simply removes the key altogether. &nbsp;In turn, when I&nbsp;send&nbsp;saveFeature:error: to AGSGDBFeatureTable, the missing key means the column is not updated. &nbsp;According to the documentation, setAttributeToNullForKey: should set the key to NSNull, not remove the key altogether. &nbsp;</P><P></P><P>How can I remove an existing value from a record?</P><P></P><P>Our SDK version is 10.2.5.</P><P>This behavior is consistent across all of our iOS devices and versions.</P></BODY></HTML> Thu, 22 Sep 2016 15:09:45 GMT WillSmith5 2016-09-22T15:09:45Z Why does setAttributeToNullForKey: remove the key from AGSGDBFeature? https://community.esri.com/t5/arcgis-runtime-sdk-for-ios-questions/why-does-setattributetonullforkey-remove-the-key/m-p/705635#M6313 <HTML><HEAD></HEAD><BODY><P>I am trying to update an existing record on the client database. &nbsp;The existing&nbsp;record has a uuidtext column with an existing value, and&nbsp;I want to remove that value and set the record's column to null. To accomplish this I am grabbing the original record from the table as an AGSGDBFeature, and then updating the keys using setAttributeToNullForKey:.&nbsp;&nbsp;&nbsp;&nbsp;</P><P></P><P>What I have found is that when I send setAttributeToNullForKey: to AGSGDBFeature, the method simply removes the key altogether. &nbsp;In turn, when I&nbsp;send&nbsp;saveFeature:error: to AGSGDBFeatureTable, the missing key means the column is not updated. &nbsp;According to the documentation, setAttributeToNullForKey: should set the key to NSNull, not remove the key altogether. &nbsp;</P><P></P><P>How can I remove an existing value from a record?</P><P></P><P>Our SDK version is 10.2.5.</P><P>This behavior is consistent across all of our iOS devices and versions.</P></BODY></HTML> Thu, 22 Sep 2016 15:09:45 GMT https://community.esri.com/t5/arcgis-runtime-sdk-for-ios-questions/why-does-setattributetonullforkey-remove-the-key/m-p/705635#M6313 WillSmith5 2016-09-22T15:09:45Z