我在 django 项目 models.py 中有一个文件:
from django.db import models
class Product(models.Model):
id = models.IntegerField(unique=True,primary_key=True)
title = models.CharField(max_length=200)
description = models.TextField(max_length= 100000)
price = models.FloatField()
count = models.IntegerField(default=1)
file_content = models.ManyToManyField(ProductImage, related_name='file_content', blank=True, null=True)
offer= models.BooleanField(default=False)
def __str__(self):
return self.title
class ProductImage(models.Model):
property_id = models.ForeignKey(Product,on_delete=models.CASCADE)
image = models.FileField(upload_to='pics')
def __str__(self):
return '%s-image' % (self.property_id.title)
它说ProductImage
没有定义,这很清楚,因为它在下面定义。如果我尝试像这样将其向上移动:
class ProductImage(models.Model):
property_id = models.ForeignKey(Product,on_delete=models.CASCADE)
image = models.FileField(upload_to='pics')
def __str__(self):
return '%s-image' % (self.property_id.title)
class Product(models.Model):
id = models.IntegerField(unique=True,primary_key=True)
title = models.CharField(max_length=200)
description = models.TextField(max_length= 100000)
price = models.FloatField()
count = models.IntegerField(default=1)
file_content = models.ManyToManyField(ProductImage, related_name='file_content', blank=True, null=True)
offer= models.BooleanField(default=False)
def __str__(self):
return self.title
现在它说Product
未定义。哪位大神能告诉我解决办法吗?
到目前为止我做了什么?
我尝试制作一个名为 img.py 的单独文件并在那里写入。然后class ProductImage
我尝试将其导入此处。现在它说:
Watching for file changes with StatReloader
Exception in thread django-main-thread:
Traceback (most recent call last):
File "c:\users\hussnain\appdata\local\programs\python\python39\lib\threading.py", line 954, in _bootstrap_inner
self.run()
File "c:\users\hussnain\appdata\local\programs\python\python39\lib\threading.py", line 892, in run
self._target(*self._args, **self._kwargs)
File "E:\UsamaComputer\env\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "E:\UsamaComputer\env\lib\site-packages\django\core\management\commands\runserver.py", line 110, in inner_run
autoreload.raise_last_exception()
File "E:\UsamaComputer\env\lib\site-packages\django\utils\autoreload.py", line 87, in raise_last_exception
raise _exception[1]
File "E:\UsamaComputer\env\lib\site-packages\django\core\management\__init__.py", line 375, in execute
autoreload.check_errors(django.setup)()
File "E:\UsamaComputer\env\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "E:\UsamaComputer\env\lib\site-packages\django\__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "E:\UsamaComputer\env\lib\site-packages\django\apps\registry.py", line 114, in populate
app_config.import_models()
File "E:\UsamaComputer\env\lib\site-packages\django\apps\config.py", line 301, in import_models
self.models_module = import_module(models_module_name)
File "c:\users\hussnain\appdata\local\programs\python\python39\lib\importlib\__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 790, in exec_module
File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
File "E:\UsamaComputer\backend\frontend\models.py", line 2, in <module>
from .img import ProductImage
File "E:\UsamaComputer\backend\frontend\img.py", line 2, in <module>
from .models import Product
ImportError: cannot import name 'Product' from partially initialized module 'frontend.models' (most likely due to a circular import) (E:\UsamaComputer\backend\frontend\models.py)
意味着我不能通过循环导入来欺骗他。你们可以帮助我吗?感谢阅读,接下来是解决它。