Eu tenho duas classes em meu banco de dados sqlite, uma tabela pai chamada Categorie
e a tabela filho chamada Article
. Criei primeiro a classe da tabela filha e adicionei entradas. Então, primeiro eu tinha isso:
class Article(models.Model):
titre=models.CharField(max_length=100)
auteur=models.CharField(max_length=42)
contenu=models.TextField(null=True)
date=models.DateTimeField(
auto_now_add=True,
auto_now=False,
verbose_name="Date de parution"
)
def __str__(self):
return self.titre
E depois de adicionar a tabela pai, agora minha models.py
aparência fica assim:
from django.db import models
# Create your models here.
class Categorie(models.Model):
nom = models.CharField(max_length=30)
def __str__(self):
return self.nom
class Article(models.Model):
titre=models.CharField(max_length=100)
auteur=models.CharField(max_length=42)
contenu=models.TextField(null=True)
date=models.DateTimeField(
auto_now_add=True,
auto_now=False,
verbose_name="Date de parution"
)
categorie = models.ForeignKey('Categorie')
def __str__(self):
return self.titre
Então, quando eu corro python manage.py makemigrations <my_app_name>
, recebo este erro:
Traceback (most recent call last):
File "manage.py", line 15, in <module>
execute_from_command_line(sys.argv)
File "C:\Users\lislis\AppData\Local\Programs\Python\Python35-32\lib\site-packages\django-2.0-py3.5.egg\django\core\management\__init__.py", line 354, in execute_from_command_line
utility.execute()
File "C:\Users\lislis\AppData\Local\Programs\Python\Python35-32\lib\site-packages\django-2.0-py3.5.egg\django\core\management\__init__.py", line 330, in execute
django.setup()
File "C:\Users\lislis\AppData\Local\Programs\Python\Python35-32\lib\site-packages\django-2.0-py3.5.egg\django\__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "C:\Users\lislis\AppData\Local\Programs\Python\Python35-32\lib\site-packages\django-2.0-py3.5.egg\django\apps\registry.py", line 112, in populate
app_config.import_models()
File "C:\Users\lislis\AppData\Local\Programs\Python\Python35-32\lib\site-packages\django-2.0-py3.5.egg\django\apps\config.py", line 198, in import_models
self.models_module = import_module(models_module_name)
File "C:\Users\lislis\AppData\Local\Programs\Python\Python35-32\lib\importlib\__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 986, in _gcd_import
File "<frozen importlib._bootstrap>", line 969, in _find_and_load
File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 673, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 665, in exec_module
File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
File "C:\Users\lislis\Django\mon_site\blog\models.py", line 6, in <module>
class Article(models.Model):
File "C:\Users\lislis\Django\mon_site\blog\models.py", line 16, in Article
categorie = models.ForeignKey('Categorie')
TypeError: __init__() missing 1 required positional argument: 'on_delete'
Eu vi alguns problemas semelhantes no stackoverflow, mas parece não ser o mesmo problema: __init __ () faltando 1 argumento posicional obrigatório: 'quantidade'