Django DB模型F组合表达式

In [1]: from django.db.models import F

In [2]: from forum.models import Post

In [3]: post = Post.objects.get(id=1)

In [4]: post.view_count = F('view_count') + 1

In [5]: post.save()

In [6]: post.view_count

Out[6]: <CombinedExpression: F(view_count) + Value(1)>

In [7]: post = Post.objects.get(id=1)

In [8]: post.view_count

Out[8]: 3
In [1]: from django.db.models import F

In [2]: