[Django]-Generating fake data to populate database

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4👍

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Your ButtonClick model has 3 fields defined as a ForeignKey: application, user and session.

When you want to create a ButtonClick instance, Django requires that you provide a valid value to each field defined as a ForeignKey — here, this means providing either model instances or None (since those ForeignKey are nullable).

With FactoryBoy, this means that you’ll have to:

  1. Define a Factory class for each of these models.
  2. Use a factory.SubFactory pointing to those factories for each of the fields.

An example would be:


class UserFactory(factory.django.DjangoModelFactory):
    class Meta:
        model = User
    username = factory.Faker('username')

class SessionFactory(factory.django.DjangoModelFactory):
    class Meta:
        model = Session
    uuid = factory.Faker('uuid4')
    user = factory.SubFactory(UserFactory)

class ApplicationFactory(factory.django.DjangoModelFactory):
    class Meta:
        model = Application
    name = factory.Faker('name')

class ButtonClickFactory(factory.django.DjangoModelFactory):
    class Meta:
        model = ButtonClick
    user = factory.SubFactory(UserFactory)
    # Ensure that click.user == click.session.user
    session = factory.SubFactory(SessionFactory, user=factory.SelfAttribute('..user'))
    application = factory.SubFactory(ApplicationFactory)

You can take a look at the docs.

By the way, with FactoryBoy’s faker integration, you don’t need to import it directly: factory.Faker('uuid4') is equivalent to faker.Faker().uuid4().

👤Xelnor

1👍

Here’s my database-populate file, probably may help you (a lot simpler than your file I believe):

# Don't change the format. Order matters!

import os
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'project.settings')

import django
django.setup()

import random
from faker import Faker

from todo.models import Todo


fakegen = Faker()

def populate(N = 10):
    for entry in range(N):
        fake_tmp = fakegen.catch_phrase()
        levels = ['important', 'normal', 'unimportant']

        fake_title = fake_tmp if len(fake_tmp) <= 40 else (fake_tmp[:37] + '...')
        fake_desc = fakegen.sentence(nb_words=70)
        fake_level = levels[random.randint(0, 2)]

        todo_item = Todo.objects.get_or_create(title=fake_title, desc=fake_desc, level=fake_level)

if __name__ == '__main__':
    print('Populating data...')
    populate(20)
    print('Populating complete')
👤crimsonpython24

0👍

for future readers!
To generate fake data for django you can use django-seed.
It’s an easy process as

  • pip install django-seed (install django-seed)

  • add django_seed in your apps in settings.py file.

    INSTALLED_APPS = (
    ...
    'django_seed',
)

  • python manage.py seed <app-name>

for example: to seed api app of django python manage.py seed api --number=15

If you need, you can also specify what value a particular field should have. For example, if you want to seed 15 of MyModel, but you need my_field to be the same on all of them, you can do it like this:

python manage.py seed api --number=15 --seeder "MyModel.my_field" "1.1.1.1"
👤Ali Aref

0👍

This is how I generated fake data into Django sqlite

Mackaroo website
go to this website and fill out details and download file in any format (sql, json or csv) any format

The good thing about this website you can provide regular expression on your columns null values and any format for numbers, dates etc

then either download it or dump it in your database

👤Azhar Uddin Sheikh

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