django-orm不区分大小写的顺序

Question

我知道,我可以从DJango ORM进行不区分大小写的搜索.喜欢,

User.objects.filter(first_name__contains="jake")
User.objects.filter(first_name__contains="sulley")
User.objects.filter(first_name__icontains="Jake")
User.objects.filter(first_name__icontains="Sulley")

而且,我可以把它们当作

user_list = User.objects.all().order_by("first_name")
# sequence: (Jake, Sulley, jake, sulley)
user_list = User.objects.all().order_by("-first_name") # for reverse
# sequence: (sulley, jake, Sulley, Jake)

对于不区分大小写的提取有直接的方法吗？就像我想要一个序列一样

# desired sequence: jake, Jake, sulley, Sulley

如果没有,那么建议一个最好的方法来做到这一点.提前致谢.

Answer 1

从Django 1.8开始,它有可能:

from django.db.models.functions import Lower
MyModel.objects.order_by(Lower('myfield'))

https://code.djangoproject.com/ticket/6498

Answer 2

这个答案已经过时,用django 1.8 - >检查下面的解决方案

我找到了使用.extra的解决方案

class MyModelName(models.Model):
   is_mine = models.BooleanField(default=False)
   name = models.CharField(max_length=100)


MyModelName.objects.filter( is_mine=1 ).extra(\
    select={'lower_name':'lower(name)'}).order_by('lower_name')

原始链接:

http://naorrosenberg.blogspot.fi/2011/04/django-models-orderby-charfield-case.html

Answer 3

这适用于postgresql,但它也可能对其他数据库有用:

http://scottbarnham.com/blog/2007/11/20/case-insensitive-ordering-with-django-and-postgresql/