Exclude attributes of just one model (not all models)

[SimBed]

I have one model with a large number of attributes, which takes up too much space in the default diagram. Reading the customisation section of the docs, I’ve figured out I can exclude this model:
$rake erd exclude="Bigtable"
Or exclude attributes of all models:
$rake erd attributes=false
But I don’t see that I can just exclude some (or all) attributes of a single model. And it would be great if that was possible.