Hi everyone, I just started playing around with meltano and tried to fetch our JIRA information to a local postgres DB. Unfortunately, the jira-tap documentation isn’t very straight-forward, and I’m now struggling with

argument type <class 'list'> is not in the flattenalbe types (<class 'collections.abc.Mapping'>,)

Can you give the full error / stack trace? I'm not a jira-tap expert but it'd help a lot to know if this is the

tap

mapper

,

target

meltano

etc

Hi @thomas_karbe, are using a value of data_flattening_max_level that’s not zero? What I think is going on, is tap-jira is declaring that field as generic JSON

object

and the actual values could be arrays (thus python lists), which target-postsgres can’t flatten. A possible workaround might be to override the type of that field: https://docs.meltano.com/concepts/plugins#schema-extra

thanks for the help! By now I found it. I first removed the

target-postgres

to see if the error persisted and therefore came from the

tap-jira

extractor. It did indeed, and was about a configuration problem. I used a list item in the config, where the tap didn’t expect one