verdi export create -c does not work

[broeder-j]

verdi export create --computers 2 -a tar.gz "computers_"$(date +%Y%m%d)
<Computer: iff003 (iff003), pk: 2>

fails with

 File "/Users/broeder/aiida/github/aiida_core/aiida/orm/importexport.py", line 1699, in export_tree
    raise ValueError("I was given {}, which is not a DbNode or DbGroup instance".format(entry))
ValueError: I was given iff003 (iff003), which is not a DbNode or DbGroup instance

My guess it that it apparently was able to load/get the computer, but Computer fails then in the more general functions, which do not expect that type.

Also
verdi export create --computers 1 2 3 4 -a tar.gz "computers_"$(date +%Y%m%d)

Fails with:

Usage: verdi export create [OPTIONS] OUTFILE
Error: Got unexpected extra arguments (3 4 computers_20180109)

Therefore the input parsing is not working for several pks, in the computer case.

[broeder-j]

update: computer exports work fine with other nodes, like codes. Also the import.
Therefore, this issue is not critical or blocking and prob a bug in the --computer export case. (Otherwise a lot more people would have noticed). But so far I do not see in the code why it should run into this at all.

If you need to export or import only computers, as a work around one can go back to version 0.9. there it works.

[szoupanos]

Yes, maybe we missed the case that someone wants to export only computers and no other nodes. We will have a look at that.

Thanks Jens for the report!

[sphuber]

Fixed in #1448