Django中ORM找出內容不為空的數據實例

在django操作數據庫的時候如何找出內容不為空的數據呢？

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

上面代碼中的models.Asset.objects.filter(~Q(nick = ’’)則是使用Q函數去找出nick不為空的數據，主要使用~Q

補充知識：Django報錯 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:workspacepycharmcarwincarwin_envlibsite-packagesdjangoutilsautoreload.py”, line 226, in wrapperfn(*args, **kwargs)File “G:workspacepycharmcarwincarwin_envlibsite-packagesdjangocoremanagementcommandsrunserver.py”, line 116, in inner_runself.check(display_num_errors=True)File “G:workspacepycharmcarwincarwin_envlibsite-packagesdjangocoremanagementbase.py”, line 472, in checkraise 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：

因為在一個表中多次引用某個外鍵表，而且沒有指定唯一的releated_name，而導致的。

解決方案：

將同一個表中外鍵，增加不同的releated_name。

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