- Author:
- miracle2k
- Posted:
- September 9, 2008
- Language:
- Python
- Version:
- 1.0
- Score:
- 3 (after 3 ratings)
Create a copy of a model instance.
Works in model inheritance case where instance.pk = None
is
not good enough, since the subclass instance refers to the
parent_link's primary key during save.
M2M relationships are currently not handled, i.e. they are not copied.
See also Django #4027.
1 2 3 4 5 6 7 | from django.db.models import AutoField
def copy_model_instance(obj):
initial = dict([(f.name, getattr(obj, f.name))
for f in obj._meta.fields
if not isinstance(f, AutoField) and\
not f in obj._meta.parents.values()])
return obj.__class__(**initial)
|
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Comments
Try this:
from copy import deepcopy old_obj = deepcopy(obj) old_obj.id = None old_obj.save()
#
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