As the title says...
Rails now supports Composite keys,
would be nice to be able to supply an array of items as the key otherwise use :id using the terser-syntax
Model.seed([:field_one,:field_two], *data)
if this currently happens you will get the follow error
Your seed constraints contained unknown columns: `[:field_one, :field_two]`. Valid columns are: `field_one`, `field_two`