django-dynamic-fixture

import os from django.conf import settings from django.apps import apps from django.db import models from ddf import G, F, N from faker import Faker # Minimal Django setup for the quickstart to be runnable without a full project if not apps.ready: settings.configure( DEBUG=True, INSTALLED_APPS=[ 'django.contrib.auth', 'django.contrib.contenttypes', ], DATABASES={ 'default': { 'ENGINE': 'django.db.backends.sqlite3', 'NAME': ':memory:', } }, SECRET_KEY='not-a-secret', USE_TZ=True, # Define a dummy app_label for models in this ad-hoc setup MIGRATION_MODULES={'myapp': None} # Prevent migrations check ) import django django.setup() # Define dummy models for the quickstart within a custom app_label class Author(models.Model): name = models.CharField(max_length=255) email = models.EmailField(unique=True) bio = models.TextField(blank=True) class Meta: app_label = 'myapp' # Required for models in minimal setup def __str__(self): return self.name class Book(models.Model): title = models.CharField(max_length=255) author = models.ForeignKey(Author, on_delete=models.CASCADE) pages = models.IntegerField(default=100) class Meta: app_label = 'myapp' # Required def __str__(): return self.title # --- Actual django-dynamic-fixture usage --- fake = Faker() print("--- Creating instances ---") # 1. Create a single Author instance author1 = G(Author, name=fake.name(), email=fake.email(), bio=fake.paragraph()) print(f" Created Author: {author1.name} ({author1.email})") # 2. Create a Book instance referencing an existing author book1 = G(Book, author=author1, title=fake.sentence(nb_words=4)) print(f" Created Book: '{book1.title}' by {book1.author.name}") # 3. Create multiple Books with dynamic values using F() # This will also create a new Author because 'author__name' is specified books_dynamic = G(Book, n=2, author__name=F(fake.name), author__email=F(fake.email), title=F(lambda: fake.sentence(nb_words=3)), pages=F(lambda: fake.random_int(min=50, max=500))) for book_obj in books_dynamic: print(f" Created Dynamic Book: '{book_obj.title}' by {book_obj.author.name} ({book_obj.pages} pages)") # 4. Create a non-persisted instance (not saved to database) draft_book = N(Book, title="Draft Idea", author=author1, pages=20) print(f" Created Draft Book (not persisted): '{draft_book.title}' by {draft_book.author.name}") # You can verify it's not saved (requires django.db.models import and Django setup) # from django.db import connection # with connection.cursor() as cursor: # cursor.execute("SELECT COUNT(*) FROM myapp_book") # print(f"Total books in DB: {cursor.fetchone()[0]}")