小编use*_*229的帖子

我想时区管理被添加到django 1.4,所以这个问题很新.

我用了一个简单的模型

class Sample(models.Model):
    ...
    date_generated = models.DateTimeField(auto_now_add = True)

当我尝试检索新创建的记录时,它失败了.

min_datetime = datetime.now() - timedelta(seconds = 300)
sample = Sample.objects.get(date_generated__gte = min_datetime)

并且服务器发出警告.

DateTimeField received a naive datetime (2012-06-29 15:02:15.074000) while time zone support is active.

我找到了解决这个问题的两个方案.

1. 在settings.py中禁用时区管理

   USE_TZ = False 
   

   Run Code Online (Sandbox Code Playgroud)

   但这并不总是令人满意的.

2. 改变

   date_generated = models.DateTimeField(auto_now_add = True) 
   

   Run Code Online (Sandbox Code Playgroud)

   至

   date_generated = models.DateTimeField(default=datetime.now()) 
   

   Run Code Online (Sandbox Code Playgroud)

   是时区管理工作的解决方案

我有以下代码：

    digraph G {
        bgcolor=antiquewhite;
        compound=true;
        { 
            rankdir=LR ; 
            rank=same g0 p1 p2 p3 h1; 
        }
        subgraph cluster0 {
            style=filled;
            color=khaki;
            g0 [label="G",shape=circle,style="filled", color="red", fillcolor="lightpink"]
            label = "Cluster 0";
            g0 -> p1;
        }
        subgraph cluster1 {
            style=filled;
            color=khaki;
            p1 [label="S2",shape=box,style="filled", color="blue", fillcolor="skyblue"];
            p2 [label="S3",shape=box,style="filled", color="blue", fillcolor="skyblue"];
            p3 [label="S3",shape=box,style="filled", color="blue", fillcolor="skyblue"];
            label = "Cluster 1";
            p1 -> p2 -> p3 [arrowhead=none] ;
        }
        subgraph cluster2 {
            style=filled;
            color=khaki;
            h1 [label="h1",shape=box,style="invis"];
            label = "Cluster 2";
            p3 -> h1; 
        }
    }

除了子图不显示外，一切都完美无缺。一旦在集群外定义了等级，子图就会消失。

如果在簇体内部定义，则簇之间的相同等级将丢失。

我尝试了通用视图的简约django实现来上传个人资料图片.

views.py

class UpdateProfile(UpdateView):
    form_class = UpdateUserProfileForm
    model = UserProfile
    success_url = reverse_lazy('show_profile')

models.py

class UserProfile(models.Model):
    user = models.OneToOneField(User)
    website = models.URLField(blank=True)
    picture = models.ImageField(upload_to='user/img/%Y-%m-%d/', blank=True)

forms.py

class UpdateUserProfileForm(forms.ModelForm):
    class Meta:
        model = UserProfile
        fields = ['website','picture']

userprofile_form.html

<form action="" enctype="multipart/form-data" method="post">{% csrf_token %}
    {{ form.as_p }}
    <input type="submit" value="{% trans "Save" %}"/>
</form>

一切正常.现在错误消息.网站字段将正确更新,搜索按钮允许选择要上传的文件.但是,该文件永远不会出现在系统中,并且数据库字段仍为空.

不幸的是,关于文件上传的django文档(https://docs.djangoproject.com/en/1.10/topics/http/file-uploads/)不包含通用视图,所以我想知道它是否可行.

更新:感谢Alasdair的回答,我更新了我的模板,因此它现在可以正常用作带有通用视图的图片上传的简约原型.

要显示图片,文档(https://docs.djangoproject.com/en/1.10/howto/static-files/)的说明再次非常有用.

此外,媒体设置是将文件上载到媒体文件夹所必需的.

settings.py

MEDIA_URL = '/media/'
MEDIA_ROOT = 'absolute-path-to/media'

urls.py

from django.conf import settings
from django.conf.urls.static import static …