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dlt-hub / verified-sources

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feat(mongodb): support mongodb through Arrow #486

Open IlyaFaer opened 3 weeks ago

IlyaFaer commented 3 weeks ago

Towards #438

IlyaFaer commented 2 weeks ago

@rudolfix, seems to me a small change in the core is needed. There is an error happening:

dlt.extract.exceptions.InvalidStepFunctionArguments: In processing pipe comments: Unable to call IncrementalResourceWrapper: Array type doesn't match type of values set: string vs null. The mapping/filtering function IncrementalResourceWrapper requires first argument to take data item and optional second argument named 'meta', but the signature is (item: Union[Any, List[Any]], meta: Any = None) -> Union[Any, List[Any], NoneType]

I figured out that such a change fixes it:

image

So, if there is nothing in remove_ids, then we don't even do filtering. Otherwise, as far as I can tell, it fails due to empty filtering-out array (which type is not defined, as there is no data in it).