Question

是否可以在下面的“详细信息”视图中将模型中的布尔值设置为false？我在django文档（查询集）中查找了类似.set()方法的内容，它似乎存在，但不适用于这种特殊情况。如何通过视图切换unread中的Models.py布尔值？

此外，我在这里误解了什么，做这件事的更好/合适的方法是什么？

Models.py：

class Message(models.Model):
    recipient = models.ForeignKey(CustomUser, on_delete = models.CASCADE,related_name = 'recipient',null = True)
    sender = models.ManyToManyField(CustomUser,related_name = 'messages')
    date = models.DateTimeField(auto_now_add=True, blank=True)
    subject = models.CharField(max_length = 1000, blank = True)
    message = models.TextField(blank=True, null=True)
    unread = models.BooleanField(default = True)

Views.py：

### Message detail class
class MessageInboxDetail(DetailView):
'''
This view lets the user view the details of a message created
'''
context_object_name = 'message_detail'
model = Message
template_name = "myInbox/message_detail.html"

def get_context_data(self, **kwargs):
    context = super(MessageInboxDetail, self).get_context_data(**kwargs)
    context.update({
        'message_detail': Message.unread.set(False) }) # Message(unread=True/False)
    return context

Answer 1

您没有通过.set(..)调用来设置模型实例的字段，而是通过分配给该属性（在幕后，Django修补了__get__和__set__函数）

因此，我们可以通过从上下文中检索message对象（使用context['message_detail']，然后更改其状态，最后将更新的版本保存到数据库中来获取class MessageInboxDetail(DetailView): ''' This view lets the user view the details of a message created ''' context_object_name = 'message_detail' model = Message template_name = "myInbox/message_detail.html" def get_context_data(self, **kwargs): context = super(MessageInboxDetail, self).get_context_data(**kwargs) message = context['message_detail'] message.unread = False message.save() return context对象。例如：

<table cellspacing="0" cellpadding="0" border="0" style="width: 390px; height: 70px; table-layout: fixed;">
        <tbody>
            <tr>
                <td rowspan="4" style="width: 72px; height: 72px; padding-right: 0px; overflow: auto;" vertical-align:"middle" valign="middle">
                  <a href="http://google.com.au"><img id="TemplateLogo" data-class="external" src="https://dummyimage.com/70.png" alt="Company Name" style="display: inline-block; margin-left: auto; margin-right: auto; vertical-align: baseline;" height="100%" width="100%"></a>
                </td>
                <td style="vertical-align: middle; padding-left: 10px; width: 264px; height: 18px;">
                  <font style="font-weight: bold; font-family: Arial; font-size: 12pt; color: rgb(81, 81, 81);">
                    John Doe
                  </font>
                </td>
            </tr>
            <tr>
              <td style="padding-bottom: 0px; vertical-align: middle; padding-left: 10px; width: 264px; height: 18px;">
                <font style="font-family: Arial; font-size: 10pt; color: rgb(81, 81, 81);">
                  Accounts
                </font>
              </td>
            </tr>
            <tr>
              <td style="vertical-align: middle; padding-left: 10px; width: 264px; height: 18px;">
                <font style="color: #515151; font-size: 10pt; font-family: Arial">
                  T:&nbsp;<a href="tel:+6199999999" style="color: #7cc0cb; text-decoration: none; border-bottom: 0px solid #7cc0cb;">(02) 4399 9999</a>&nbsp;|&nbsp;
                  F:&nbsp;<a href="tel:+6199999999" style="color: #7cc0cb; text-decoration: none; border-bottom: 0px solid #7cc0cb;">(02) 4399 9999</a>
                </font>
              </td>
            </tr>
            <tr>
              <td style="vertical-align: middle; padding-left: 10px; width: 264px; height: 18px;">
                <font style="color: #515151; font-size: 10pt; font-family: Arial">
                  E:&nbsp;<a href="mailto:example@example.com.au" style="color: #7cc0cb; text-decoration: none; border-bottom: 0px solid #7cc0cb;">example@example.com.au</a>
                </font>
              </td>
            </tr>
        </tbody>
    </table>

但是我不知道在详细视图中将消息标记为已读是否是一个好主意，它可能导致代码重复，但这通常不是一个好主意。

如何设置模型属性，在Django查询中切换布尔值？

1 个答案: