Most of us have this misconception that transformers can not be used inside loop. well i had this misconception. Recently i got insight into this and got clarification that transformer can be used inside loop.
“Transformers can be used in a loop. What they do not do is accept a list when a single item is expected. The error message generated in this case is completely misleading. If you receive this error, you’re passing a list instead of a single item. Pass a single item and the error will disappear.“
Thanks Reamon for the clarification.
When an exception is encountered within a transformer – Will it revert the pipeline to the state before it was invoked?
No, only the input of transformer servcie will be in lasterror/pipeline.