Question

我知道我可以通过Blog.objects.values（'name'，'entry_ headline'）获取ForeignKey和ManyToManyField属性，无论如何都以相同的方式获得选择值？我的意思是Blog.objects.values（'name'，'choices _values'）而不是使用get_FOO_display（）。

Answer 1

models.py

class MyModel(models.Model)
    ALL = "ALL"
    NONE = "NONE"
    HALF = "HALF"
    SELECT_CHOICES = (
        (ALL, "100%"),
        (HALF, "50%"),
        (NONE, "0%"),
    )
    select_field = models.CharField(max_length = 255, choices = SELECT_CHOICES)

    @property
    def select_ratio(self):
        return self.get_select_field_display()

Anywhere的：

mymodels = MyModel.objects.all()
for entry in mymodels:
    print entry.select_ratio

Answer 2

鉴于显示字符串包含在Python中，除非您像这样手动设置，否则确实没有办法在数据库查询中提供它们：

from django.db.models import Case, Value, When

Blog.objects.values('name').annotate(
    status_verbose=Case(
        When(status=PENDING, then=Value('Pending')),
        When(status=PUBLISHED, then=Value('Published')),
        default=Value('Draft'),
        output_field=CharField(),
    )
)

Django Docs for Case

如何在queryset中获取选择值？

2 个答案: