AggJoiner raises exceptions when trying to join multiple tables at once

[rcap107]

AggJoiner raises exceptions when trying to join multiple tables at once

[GaelVaroquaux]

Is this a case where the MultiAggJoiner is the right object? cc @TheooJ

If so, we should clarify the docstring of AggJoiner, and raise a clean error when it is given multiple tables, pointing to the MultiAggJoiner

[jeromedockes]

I get this error:

TypeError: 'aux_table' must be a dataframe or the string 'X', got <class 'list'>. If you have more than one 'aux_table', use the MultiAggJoiner instead.

[rcap107]

I was working from the version available on pip, so that's why the error message was not clear. Switching to the MultiAggJoiner from the main branch fixed the issue.

[TheooJ]

Yes, the AggJoiner available on PyPI is not the same as the one on the main branch -- but we made sure to include a useful message for that particular case. It'll be available for the next release !

Btw @rcap107 we should have a chat if you have a wishlist for the (Multi)AggJoiner !

[jeromedockes]

great, I think we can close this then as it is fixed on the main branch. Thanks for checking that @rcap107 !