Error Handling for Missing Fields

“az functionapp list --output table fails when appServicePlanId is absent ## Summary `az functionapp list --output table` fails when any Function App response omits `appServicePlanId`. JSON output succeeds. ## Reproduction ```bash az version # azure-cli 2.89.1 az functionapp list --output table ``` ## Actual result ```text ERROR: Table output unavailable. Use the --query option to specify an appropriate query. Use --debug for more info. ``` The debug traceback identifies the underlying failure: ```text File "azure/cli/command_modules/appservice/commands.py", line 35, in transform_web_output result["appServicePlan"] = result.pop("appServicePlanId").split("/")[-1] KeyError: 'appServicePlanId' ``` ## Expected result `az functionapp list --output table` should render the Function Apps list without failing when `appServicePlanId` is missing. The formatter should tolerate an omitted optional field. ## Workaround Explicitly project fields before requesting table output: ```bash az functionapp list --query '[].{Name:name,ResourceGroup:resourceGroup,Location:location,State:state}' --output table ``` ## Related issues - #33516: `az functionapp function keys list` broken in 2.87.0 - #16698: `az functionapp list` returns incorrect null values This may be another regression in the Function App output/transform layer introduced around 2.87.0.”