Question

我有一个名为Book的模型，它有一个属性when_added，用于存储创建对象实例的时间：

class Book(models.Model):
    book_id = models.AutoField(primary_key=True)
    title = models.CharField(max_length=30)

    # Record the date whenever a new book is added, it will be helpful for showing new arrivals
    when_added = models.DateTimeField(auto_now_add=True, blank=True, null= True)

    #This helps to print in admin interface
    def __str__(self):
        return u"%s" % (self.title)

我正在写一个视图，它会返回我在过去两周内添加的书籍列表：

from datetime import date, timedelta

@api_view(['GET'])
def new_arrivals(request, library_id):
    """
    List all new arrival books in a specific library
    """
    d=date.today()-timedelta(days=14)
    print(d)
    if request.method == 'GET':
        books = Book.objects.filter(which_library=library_id)
        books = books.filter(when_added>d)
        print(books)
        serializer = BookSerializer(books, many=True)
        return Response(serializer.data)

我收到一条警告RuntimeWarning: DateTimeField Book.when_added received a naive datetime (2017-11-27 00:00:00) while time zone support is active.，并且没有任何书籍。

我做错了什么？

Answer 1

您是否尝试过使用时区感知日期？

from django.utils import timezone

...
# in the new arrivals view
d=timezone.now()-timedelta(days=14)

Django检索在过去两周内创建的对象实例

1 个答案: