Models creation

You can get model instance saved in database without secifying any model fields:

Given you have a simple polls model from django tutorial:

#models.py
class Poll(models.Model):
    question = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')

You can create random poll instance not having to provide question text or pub_date, if they’re not relevant for your test case:

#tests.py
from django_any import any_model
user = any_model(Poll)

It will create a poll instance with both fields filled with meaningless but valid data:

'question': 'KStKMESUXDjnlDNcJLsAiLcZQGnVXhORIKxWYtPwiqgVXgFvgpmMajwbGFRkoCo'
'pub_date': datetime.datetime(2002, 10, 1, 6, 1, 16)

django-any will fill all required foreign keys and create related model instances as well.

Specifying values

If you need an instance with specific values you can provide them this way:

user = any_model(Poll, question='To be or not ot be?')

Note, that pub_date will still be generated randomly for you.:

'question': 'To be or not ot be?'
'pub_date': datetime.datetime(2004, 5, 11, 16, 48, 35)

Constraints

django-whatever will preserve all field constraints, such as max_length, and choices when filling models with random data. It also tries to honor model custom validation by making model instances until full_clean() returns True.

Relations

django-whatever supports Django ORM-like double-underscore syntax for setting values for related instances:

#models.py
class Choice(models.Model):
    poll = models.ForeignKey(Poll)
    choice = models.CharField(max_length=200)
    votes = models.IntegerField()

#tests.py
order = any_model(Choice, poll__pub_date = datetime.now())

Fixtures

In case you need data from fixtures for creation of your models you can use Q objects to select values for fields from db:

order = any_model(Order, customer__location=Q(country='US'))

It will create an order for existing customer, whose country is US.

Custom model fields

It’s quite common to create custom model fields to store data. To let django-whatever know how to generate random data for this filed you should register it explicitly:

@any_field.register(model_utils.field.AutoCreatedField)
def any_auto_created_field(field, **kwargs):
    return datetime.datetime.now()

Note

When project defines a lot of custom fields, it can be a hassle to register all of them manually. Quite often the registered sample data for the field the custom field was inherited from will work just as well, so django-whatever tries to use parent generator if no function is registered for a custom field.