在 Django 中使用 get_next_by_FOO 和 get_previous_by_FOO
Using get_next_by_FOO and get_previous_by_FOO in django
我正在解决此处列出的问题:How can I use get_next_by_FOO() in django?
我已经更改了我的项目的代码(见下文),但是当我单击“下一步”以超链接到我的图片模型中的下一个对象时,同一页面只会重新加载。有人可以告诉我我做错了什么吗?
Models.py
class Picture(models.Model):
name = models.CharField(max_length=100)
date_posted = models.DateTimeField(default=timezone.now)
author = models.ForeignKey(User, on_delete=models.CASCADE)
image = models.ImageField(upload_to='photo/')
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse('picture-detail', kwargs={ 'pk': self.pk })
views.py
class PictureDetailView(DetailView):
model = Picture
def picture_detail(request, id=None):
instance = get_object_or_404(Picture, id=id)
the_next = instance.get_next_by_date_posted()
context = {
'name': instance.name,
'instance': instance,
'the_next': the_next,
}
return render(request, 'gallery/picture_detail.html', context)
urls.py
urlpatterns = [
path('', views.home, name='gallery-home'),
path('picture/', PictureListView.as_view(), name='gallery-picture'),
path('picture/<int:pk>/', PictureDetailView.as_view(), name='picture-detail'),
]
picture_detail.html
<a href="{{ the_next }}"> Next </a>
您需要获取下一个实例的get_absolute_url
。 the_next
只是一个 Picture
,不是它的 link,所以:
<a href="{{ the_next<b>.get_absolute_url</b> }}">Next</a>
我正在解决此处列出的问题:How can I use get_next_by_FOO() in django?
我已经更改了我的项目的代码(见下文),但是当我单击“下一步”以超链接到我的图片模型中的下一个对象时,同一页面只会重新加载。有人可以告诉我我做错了什么吗?
Models.py
class Picture(models.Model):
name = models.CharField(max_length=100)
date_posted = models.DateTimeField(default=timezone.now)
author = models.ForeignKey(User, on_delete=models.CASCADE)
image = models.ImageField(upload_to='photo/')
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse('picture-detail', kwargs={ 'pk': self.pk })
views.py
class PictureDetailView(DetailView):
model = Picture
def picture_detail(request, id=None):
instance = get_object_or_404(Picture, id=id)
the_next = instance.get_next_by_date_posted()
context = {
'name': instance.name,
'instance': instance,
'the_next': the_next,
}
return render(request, 'gallery/picture_detail.html', context)
urls.py
urlpatterns = [
path('', views.home, name='gallery-home'),
path('picture/', PictureListView.as_view(), name='gallery-picture'),
path('picture/<int:pk>/', PictureDetailView.as_view(), name='picture-detail'),
]
picture_detail.html
<a href="{{ the_next }}"> Next </a>
您需要获取下一个实例的get_absolute_url
。 the_next
只是一个 Picture
,不是它的 link,所以:
<a href="{{ the_next<b>.get_absolute_url</b> }}">Next</a>