应将描述:
我有一个通用功能
def gen(model_name,model_type):
objects = model_name.objects.all()
for object in objects:
object.model_type = Null (Or some activity)
object.save()
我如何实现上述目标?有可能吗?
答案 0 :(得分:37)
我会使用get_model
:
from django.db.models import get_model
mymodel = get_model('some_app', 'SomeModel')
答案 1 :(得分:21)
从Django 1.7开始,django.db.models.loading
is deprecated(将在1.9中删除)支持新的应用程序加载系统。以下是1.7 docs give us:
$ python manage.py shell
Python 2.7.6 (default, Mar 5 2014, 10:59:47)
>>> from django.apps import apps
>>> User = apps.get_model(app_label='auth', model_name='User')
>>> print User
<class 'django.contrib.auth.models.User'>
>>>
答案 2 :(得分:4)
如果您传入“app_label.model_name”,则可以使用contenttypes,例如
from django.contrib.contenttypes.models import ContentType
model_type = ContentType.objects.get(app_label=app_label, model=model_name)
objects = model_type.model_class().objects.all()
答案 3 :(得分:0)
Django 1.5的完整答案是:
from django.db.models.loading import AppCache
app_cache = AppCache()
model_class = app_cache.get_model(*'myapp.MyModel'.split('.',1))