# lookup the sliver allocations
sliver_ids = [sliver['sliver_id'] for sliver in slivers]
constraint = SliverAllocation.sliver_id.in_(sliver_ids)
# lookup the sliver allocations
sliver_ids = [sliver['sliver_id'] for sliver in slivers]
constraint = SliverAllocation.sliver_id.in_(sliver_ids)