Django中ORM找出内容不为空的数据实例

在django操作数据库的时候如何找出内容不为空的数据呢？

from django.db.models import Q
 
class Index(VIew):
 def get(self, request):
 userObj = models.Asset.objects.filter(~Q(asset_id = '')
 return HttpResponse('yes')

上面代码中的models.Asset.objects.filter(~Q(nick = ”)则是使用Q函数去找出nick不为空的数据，主要使用~Q

补充知识：Django报错 HINT: Add or change a related_name argument to the definition for ‘GodownentryReturn.suppl

Unhandled exception in thread started by <function wrapper at 0x05569030 Traceback (most recent call last): File “G:\workspace\pycharm\carwin\carwin_env\lib\site-packages\django\utils\autoreload.py”, line 226, in wrapper fn(*args, **kwargs) File “G:\workspace\pycharm\carwin\carwin_env\lib\site-packages\django\core\management\commands\runserver.py”, line 116, in inner_run self.check(display_num_errors=True) File “G:\workspace\pycharm\carwin\carwin_env\lib\site-packages\django\core\management\base.py”, line 472, in check raise SystemCheckError(msg) django.core.management.base.SystemCheckError: SystemCheckError: System check identified some issues: ERRORS: article.GodownentryReturn.supplier: (fields.E304) Reverse accessor for ‘GodownentryReturn.supplier’ clashes with reverse accessor for ‘GodownentryReturn.supplier’. HINT: Add or change a related_name argument to the definition for ‘GodownentryReturn.supplier’ or ‘GodownentryReturn.supplier’. part.GodownentryReturn.supplier: (fields.E304) Reverse accessor for ‘GodownentryReturn.supplier’ clashes with reverse accessor for ‘GodownentryReturn.supplier’. HINT: Add or change a related_name argument to the definition for ‘GodownentryReturn.supplier’ or ‘GodownentryReturn.supplier’.

原因：

因为在一个表中多次引用某个外键表，而且没有指定唯一的releated_name，而导致的。

解决方案：

将同一个表中外键，增加不同的releated_name。

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