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saulshanabrook/find_non_unique.py

Last active August 29, 2015 14:16
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Looks for all instances of a model with certain field duplicated
Raw
find_non_unique.py
def find_non_unique(model, *fields):
from collections import defaultdict
d = defaultdict(list)
for instance in model.objects.all():
d[tuple(getattr(instance, field) for field in fields)].append(instance)
return filter(lambda dups: len(dups)>1, d.values())
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