我正在尝试编写一个模型管理器来获取所有发布的条目,并且开始日期是在过去的now
。奇怪的是,如果我将日期设置为过去的某个值(提前1分钟),则一切正常,但如果我将日期设置为将来的值(提前1分钟),则即使等待1分钟以上进行测试,对象也不会显示。如果我只重新启动服务器,则会显示条目。但我不能每次发布条目时都重新启动服务器。你知道吗
有人看到这个代码有什么问题吗?或者可以采取不同的做法?你知道吗
from django.utils import timezone
now = timezone.now()
def entries_published(queryset):
"""Return only the entries published"""
return queryset.filter(
models.Q(start_publication__lte=now) | \
models.Q(start_publication=None),
models.Q(end_publication__gt=now) | \
models.Q(end_publication=None),
status=PUBLISHED)
class EntryPublishedManager(models.Manager):
"""Manager to retrieve published entries"""
def get_queryset(self):
"""Return published entries"""
return entries_published(
super(EntryPublishedManager, self).get_queryset())
class Entry(models.Model):
title = models.CharField(max_length=255)
slug = models.SlugField(max_length=255)
categories = models.ManyToManyField(Category, related_name='entries', blank=True, null=True)
creation_date = models.DateTimeField(auto_now_add=True)
start_publication = models.DateTimeField(blank=True, null=True, help_text="Date and time the entry should be visible")
end_publication = models.DateTimeField(blank=True, null=True, help_text="Date and time the entry should be removed from the site")
status = models.IntegerField(choices=STATUS_CHOICES, default=DRAFT)
objects = models.Manager()
published = EntryPublishedManager()
我的观点是这样的:
class EntryListView(ListView):
context_object_name = "entry_list"
paginate_by = 20
queryset = Entry.published.all().order_by('-start_publication')
如果我在entries_published
的def中移动now = timezone.now()
,CategoryDetail
视图将获得正确的发布条目。知道为什么EntryListView
没有显示正确的吗?你知道吗
这是我的CategoryDetail
视图
#View for listing one category with all connected and published entries
class CategoryDetail(ListView):
paginate_by = 20
def get_queryset(self):
self.category = get_object_or_404(Category, slug=self.kwargs['slug'])
return Entry.published.filter(categories=self.category).order_by('-start_publication', 'title')
def get_context_data(self, **kwargs):
# Call the base implementation first to get a context
context = super(CategoryDetail, self).get_context_data(**kwargs)
# Add in the category
context['category'] = self.category
return context
如果我将EntryListView
更改为:
class EntryListView(ListView):
model = Entry
context_object_name = "news_list"
paginate_by = 20
def get_queryset(self):
return Entry.published.all().order_by('-start_publication')
一切正常。奇怪,但我不在乎。你知道吗
编辑时间: 我想你现在的问题是时区。现在()在启动应用程序时设置。在已发布的方法中定义“now”。你知道吗
添加: 我建议简化方法,确保调用类方法,并完全跳过函数定义。你知道吗
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