Hi all is it possible to have order based nothing dependenci

Question

Hi all is it possible to have order based nothing dependencies that have can consume a real parameter as well i e `solid1 gt Nothing solid2 gt String solid3 solid1 solid2 ` When I try this I get an error about unmapped parameters I have a gist that illustrates this issue if that would help

alex · Answer

can you send the gist link i think that would be helpful

Andrew Herbst · Answer

alex · Answer

ah so the fix here is to wire the `Nothing` dep with a `kwarg`

alex · Answer

``` downstream consuming string real string start=upstream returning nothing ```

alex · Answer

the error message could be better here for sure

Andrew Herbst · Answer

ah interesting

Andrew Herbst · Answer

Thanks

alex · Answer

we treat the function signature as the source of truth for the order of args when passed as positional Since Nothing is explicitly omitted there it means that `Nothing` deps basically always have to be passed by keyword when there are other args in the mix

Andrew Herbst · Answer

The other wrinkle here is that we d like to use this in a composite scenario as well

Andrew Herbst · Answer

~ah nm I think it works there as well~ Hmm no this doesn t seem to work for composite gt composite dependencies <https gist github com aherbst broad 148c643d1bf245809fe854c3fd1a57ee>

alex · Answer

what error do you get for the latter One problem is that you have an empty composite it has to have a real solid in it to map that Nothing output from

alex · Answer

oops responded to the wrong gist but here is a working sample <https gist github com aherbst broad 1c08a76d61055bb5dab9491aec3f75ea gistcomment 3766557>