In any field that is a ForeignKey you now have to add "on_delete = ???"
(there are a number of options to replace the ???).
See the last line of the error message as it shows you the file and line
number of where the error is.
On Friday, 06 July, 2018 07:13 PM, Umar Kambala wrote:
please this the error i got when i run python manage.py makemigrations
File
"C:\Users\Admin\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\core\management\__init__.py",
line 371, in execute_from_command_line
utility.execute()
File
"C:\Users\Admin\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\core\management\__init__.py",
line 347, in execute
django.setup()
File
"C:\Users\Admin\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\__init__.py",
line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File
"C:\Users\Admin\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\apps\registry.py",
line 112, in populate
app_config.import_models()
File
"C:\Users\Admin\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\apps\config.py",
line 198, in import_models
self.models_module = import_module(models_module_name)
File
"C:\Users\Admin\AppData\Local\Programs\Python\Python36-32\lib\importlib\__init__.py",
line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 994, in _gcd_import
File "<frozen importlib._bootstrap>", line 971, in _find_and_load
File "<frozen importlib._bootstrap>", line 955, in
_find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 678, in exec_module
File "<frozen importlib._bootstrap>", line 219, in
_call_with_frames_removed
File "C:\Users\Admin\Desktop\Django Web\myproject\boards\models.py",
line 10, in <module>
class Topic (models.Model):
File "C:\Users\Admin\Desktop\Django Web\myproject\boards\models.py",
line 13, in Topic
board = models.ForeignKey(Board, related_name='topics')
TypeError: __init__() missing 1 required positional argument: 'on_delete'
this are the codes
from django.dbimport models
from django.contrib.auth.modelsimport User
class Board(models.Model):
name = models.CharField(max_length=30, unique=True)
description = models.CharField(max_length=100)
class Topic (models.Model):
subject = models.CharField(max_length=255)
last_updated = models.DateTimeField()
board = models.ForeignKey(Board, related_name='topics')
starter = models.ForeignKey(User, related_name='topics')
class Post(models.Model):
message = models.TextField(max_length=4000)
topic = models.ForeignKey(Topic, related_name='posts')
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(null=True)
created_by = models.ForeignKey(User, related_name='posts')
updated_by = models.ForeignKey(User, null=True, related_name='+')
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