django: How to make copy of one of the objects in the db

Question

Hi,

I wonder if there is a way to make a copy of one db item?

e.g. I have a model

class Category(models.Model):
    slug = models.CharField(max_length=200)
    name = models.CharField(max_length = 200)

So if I added one item, how can i clone it 100 times for testing?

Answer 1

# Create a bunch of new objects
for i in xrange(0,100):
    new_cat = Category(slug='a-slug', name="My Name")
    new_cat.save()

If you're just looking to populate your database for testing purposes, you may want to look at using fixtures instead.

Answer 2

If the model has an autoincrement PK (the default) then you can create or retrieve the object once, then wipe the PK before saving it:

row = SomeModel(...)
for i in xrange(100:
  row.pk = None
  row.save()