生成假数据以填充数据库
Generating fake data to populate database
我正在尝试使用 factory boy 和 faker 为我正在构建的网站生成一些虚假数据。这是我的 models.py:
# External Imports
from django.db import models
import uuid
# Internal Imports
from applications.models.application import Application
from users.models.user import User
from .session import Session
# Fake data
import factory
import factory.django
import factory.fuzzy
from datetime import datetime
from faker import Faker
from faker.providers import BaseProvider
import random
class ButtonClick(models.Model):
"""**Database model that tracks and saves button clicks for an application**
"""
# identifier
id = models.UUIDField(default=uuid.uuid4, primary_key=True, editable=False)
# info
button_name = models.CharField(max_length=128, null=True, blank=True)
application = models.ForeignKey(
Application, related_name='button_clicks', null=True, blank=True, on_delete=models.CASCADE)
user = models.ForeignKey(
User, related_name='button_clicks', null=True, blank=True, on_delete=models.CASCADE)
session = models.ForeignKey(
Session, related_name='button_clicks', null=True, blank=True, on_delete=models.CASCADE)
timestamp = models.DateTimeField(auto_now=True)
class Meta:
db_table = 'button_clicks'
ordering = ('-timestamp', )
def __str__(self):
return f'{self.application} - {self.button_name}'
fake = Faker()
faker = Factory.create()
class ApplicationFactory(factory.DjangoModelFactory):
class Meta:
model = Application
application = factory.LazyAttribute(lambda _: faker.word())
class FakeButtonClick(factory.django.DjangoModelFactory):
class Meta:
model = ButtonClick
button_name = factory.Faker('first_name')
application = factory.SubFactory(ApplicationFactory)
user = factory.Faker('name')
session = factory.Faker('random_int')
timestamp = factory.Faker('date')
当我尝试在终端中 运行 以下代码时，出现错误：
>>> from analytics.models.button_click import FakeButtonClick
>>> for _ in range(200): FakeButtonClick.create()
...
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/factory/base.py", line 564, in create
return cls._generate(enums.CREATE_STRATEGY, kwargs)
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/factory/django.py", line 141, in _generate
return super(DjangoModelFactory, cls)._generate(strategy, params)
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/factory/base.py", line 501, in _generate
return step.build()
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/factory/builder.py", line 279, in build
kwargs=kwargs,
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/factory/base.py", line 315, in instantiate
return self.factory._create(model, *args, **kwargs)
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/factory/django.py", line 185, in _create
return manager.create(*args, **kwargs)
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/django/db/models/query.py", line 431, in create
obj = self.model(**kwargs)
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/django/db/models/base.py", line 482, in __init__
_setattr(self, field.name, rel_obj)
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/django/db/models/fields/related_descriptors.py", line 219, in __set__
self.field.remote_field.model._meta.object_name,
ValueError: Cannot assign "9714": "ButtonClick.application" must be a "Application" instance.
我过去使用 factory boy 和 faker 创建了一些非常简单的数据，但回溯似乎暗示我需要在我的 FakeButtonClick class 中创建一个应用程序实例？我检查了文档，应用程序似乎不是工厂 boy/faker 的可用实例。我需要自己创建实例吗？也许是一个子工厂？
这是我的数据库填充文件，可能会对您有所帮助（我认为比您的文件简单得多）：
# 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')
您的 ButtonClick 模型有 3 个字段定义为 ForeignKey：application、user 和 session。
当你想创建一个 ButtonClick 实例时，Django 要求你为定义为 ForeignKey 的每个字段提供一个有效值——在这里，这意味着提供模型实例或 None（因为那些 ForeignKey 可以为空）。
对于 FactoryBoy，这意味着您必须：
- 为每个模型定义一个
Factory class。
- 使用
factory.SubFactory 指向每个字段的工厂。
例如：
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)
你可以看看at the docs.
顺便说一下，使用 FactoryBoy 的 faker integration，您不需要直接导入它：factory.Faker('uuid4') 等同于 faker.Faker().uuid4().
为了未来的读者！
要为 django 生成虚假数据，您可以使用 django-seed。
这是一个简单的过程，因为
pip install django-seed（安装django-seed）
在 settings.py 文件中的应用程序中添加 django_seed。
INSTALLED_APPS = (
...
'django_seed',
)
python manage.py seed <app-name>
例如：播种 api django 应用 python manage.py seed api --number=15
如果需要，您还可以指定特定字段应具有的值。例如，如果你想为 MyModel 做 15 个种子，但你需要 my_field 对所有这些都是相同的，你可以这样做：
python manage.py seed api --number=15 --seeder "MyModel.my_field" "1.1.1.1"
这就是我如何将假数据生成到 Django sqlite
Mackaroo website
转到此网站并填写详细信息并下载任何格式的文件（sql、json 或 csv）任何格式
关于本网站的优点，您可以在您的列空值和任何format 用于数字、日期等
然后 下载 或将其转储到您的 database
我正在尝试使用 factory boy 和 faker 为我正在构建的网站生成一些虚假数据。这是我的 models.py:
# External Imports
from django.db import models
import uuid
# Internal Imports
from applications.models.application import Application
from users.models.user import User
from .session import Session
# Fake data
import factory
import factory.django
import factory.fuzzy
from datetime import datetime
from faker import Faker
from faker.providers import BaseProvider
import random
class ButtonClick(models.Model):
"""**Database model that tracks and saves button clicks for an application**
"""
# identifier
id = models.UUIDField(default=uuid.uuid4, primary_key=True, editable=False)
# info
button_name = models.CharField(max_length=128, null=True, blank=True)
application = models.ForeignKey(
Application, related_name='button_clicks', null=True, blank=True, on_delete=models.CASCADE)
user = models.ForeignKey(
User, related_name='button_clicks', null=True, blank=True, on_delete=models.CASCADE)
session = models.ForeignKey(
Session, related_name='button_clicks', null=True, blank=True, on_delete=models.CASCADE)
timestamp = models.DateTimeField(auto_now=True)
class Meta:
db_table = 'button_clicks'
ordering = ('-timestamp', )
def __str__(self):
return f'{self.application} - {self.button_name}'
fake = Faker()
faker = Factory.create()
class ApplicationFactory(factory.DjangoModelFactory):
class Meta:
model = Application
application = factory.LazyAttribute(lambda _: faker.word())
class FakeButtonClick(factory.django.DjangoModelFactory):
class Meta:
model = ButtonClick
button_name = factory.Faker('first_name')
application = factory.SubFactory(ApplicationFactory)
user = factory.Faker('name')
session = factory.Faker('random_int')
timestamp = factory.Faker('date')
当我尝试在终端中 运行 以下代码时，出现错误：
>>> from analytics.models.button_click import FakeButtonClick
>>> for _ in range(200): FakeButtonClick.create()
...
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/factory/base.py", line 564, in create
return cls._generate(enums.CREATE_STRATEGY, kwargs)
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/factory/django.py", line 141, in _generate
return super(DjangoModelFactory, cls)._generate(strategy, params)
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/factory/base.py", line 501, in _generate
return step.build()
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/factory/builder.py", line 279, in build
kwargs=kwargs,
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/factory/base.py", line 315, in instantiate
return self.factory._create(model, *args, **kwargs)
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/factory/django.py", line 185, in _create
return manager.create(*args, **kwargs)
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/django/db/models/query.py", line 431, in create
obj = self.model(**kwargs)
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/django/db/models/base.py", line 482, in __init__
_setattr(self, field.name, rel_obj)
File "/Users/ryan/bloks/bloks-backend/venv/lib/python3.7/site-packages/django/db/models/fields/related_descriptors.py", line 219, in __set__
self.field.remote_field.model._meta.object_name,
ValueError: Cannot assign "9714": "ButtonClick.application" must be a "Application" instance.
我过去使用 factory boy 和 faker 创建了一些非常简单的数据，但回溯似乎暗示我需要在我的 FakeButtonClick class 中创建一个应用程序实例？我检查了文档，应用程序似乎不是工厂 boy/faker 的可用实例。我需要自己创建实例吗？也许是一个子工厂？
这是我的数据库填充文件，可能会对您有所帮助（我认为比您的文件简单得多）：
# 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')
您的 ButtonClick 模型有 3 个字段定义为 ForeignKey：application、user 和 session。
当你想创建一个 ButtonClick 实例时，Django 要求你为定义为 ForeignKey 的每个字段提供一个有效值——在这里，这意味着提供模型实例或 None（因为那些 ForeignKey 可以为空）。
对于 FactoryBoy，这意味着您必须：
- 为每个模型定义一个
Factoryclass。 - 使用
factory.SubFactory指向每个字段的工厂。
例如：
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)
你可以看看at the docs.
顺便说一下，使用 FactoryBoy 的 faker integration，您不需要直接导入它：factory.Faker('uuid4') 等同于 faker.Faker().uuid4().
为了未来的读者！
要为 django 生成虚假数据，您可以使用 django-seed。
这是一个简单的过程，因为
pip install django-seed（安装django-seed）在
settings.py文件中的应用程序中添加django_seed。INSTALLED_APPS = ( ... 'django_seed', )python manage.py seed <app-name>
例如：播种 api django 应用 python manage.py seed api --number=15
如果需要，您还可以指定特定字段应具有的值。例如，如果你想为 MyModel 做 15 个种子，但你需要 my_field 对所有这些都是相同的，你可以这样做：
python manage.py seed api --number=15 --seeder "MyModel.my_field" "1.1.1.1"
这就是我如何将假数据生成到 Django sqlite
Mackaroo website
转到此网站并填写详细信息并下载任何格式的文件（sql、json 或 csv）任何格式
关于本网站的优点，您可以在您的列空值和任何format 用于数字、日期等
然后 下载 或将其转储到您的 database