Mutating array relationships directly does not work

[boydgreenfield]

Currently, sample.tags.append(new_tag) counterintuitively fails, and does not include new_tag. This is because we're creating the tags attribute on the fly and wrapping the underlying potion-client resource, i.e., creating a new list with each __getattr__ call.

The TODO here is to update how we handle arrays in the API so that the above operations (as well as pop, etc.) work properly.

In the meantime, users should use the following workaround:

tag_list = sample.tags
tag_list.append(new_tag)
sample.tags = tag_list
tag_list.save()

[polyatail]

I think there's a not-too-difficult path to fixing this, by creating a new ResourceList object that emulates a list. Well, it mostly just is a list, but it passes actions down the line to the underlying _resource object that, in the example given by @boydgreenfield, doesn't get updated.