build_path not working because path_patterns not set

[Islast]

It would be ideal for pybids to be able to determine new BIDS compliant paths for new or hypothetical files based on a dictionary of entities. At the moment there is a BIDSLayout method to do this, build_path. However build_path builds paths from the patterns it inherits from BIDSLayout which are currently an empty list, which means that build_path returns nothing.
If i define new path_patterns for a BIDSLayout build_path is able to run as expected.

There seem to be path_patterns defined in the BIDSLayout config files (https://github.com/INCF/pybids/blob/7315f5c41d6cf20c0f4c9d8624e408ed1e1bbf5f/bids/grabbids/config/bids.json lines 82-89). Is there any way to import these when the BIDSLayout is initialised?

[tyarkoni]

Ah, this is a casualty of the Domain classes introduced in a recent version of grabbit. Before, path_patterns used to be a property of the Layout object, but now each Domain has its own path_patterns. So the build_path method needs to be updated to accept a list of domains as an argument, or to combine all available domains if none is passed. Then it would work fine. I'll try to get to this in the next few days, but feel free to submit a PR to grabbit if you like. I've opened an issue for this here.

[tyarkoni]

Took care of this in grabbles/grabbit#79; should be fixed in pybids once I bump grabbit version later today. Thanks for reporting it!