遇到Django中的通知功能问题。

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英文:

Having trouble with notifications feature in Django

问题

<div class="dropdown-content" id="myDropdown">
    {% if notifications %}
        {% for notification in notifications %}
            {% if notification.notification_type == 'created' %}
                <a href="#">{{notification.ticket.name}}: 有新工单分配给你。</a>
            {% else %}
                <a href="#">{{notification.ticket.name}}: 工单已更新。</a>
            {% endif %}
        {% endfor %}
    {% else %}
        <a href="#">没有新通知。</a>
    {% endif %}
</div>
英文:

Created a notification feature in my django project. I've got all the functionality down and it works except for one thing. I want the template to display a different message depending on what action is committed. All it currently displays is 'The ticket has been updated' instead of 'A new ticket has been assigned to you.' How do I fix this?

Here is what i have so far.

template

&lt;div class=&quot;dropdown-content&quot; id=&quot;myDropdown&quot;&gt;
          {% if notifications %}
            {% for notification in notifications %}
              {% if notification.notification_type == &#39;created&#39; %}
                &lt;a href=&quot;#&quot;&gt;{{notification.ticket.name}}: A new ticket has been assigned to you.&lt;/a&gt;
              {% else %}
                &lt;a href=&quot;#&quot;&gt;{{notification.ticket.name}}: The ticket has been updated.&lt;/a&gt;
              {% endif %}
            {% endfor %}
          {% else %}
            &lt;a href=&quot;#&quot;&gt;No new notifications&lt;/a&gt;
          {% endif %}
&lt;/div&gt;

models.py for notification

class Notification(models.Model):
    OPTIONS = (
        (&#39;created&#39;, &#39;created&#39;),
        (&#39;updated&#39;, &#39;updated&#39;),
    )
    
    recipient = models.ForeignKey(CustomUser, on_delete=models.SET_NULL, null=True, related_name=&#39;notifications&#39;)
    ticket = models.ForeignKey(Ticket, on_delete=models.SET_NULL, null=True, related_name=&#39;notifications&#39;)
    message = models.TextField()
    notification_type = models.CharField(choices=OPTIONS, max_length=15, null=True)
    is_read = models.BooleanField(default=False)
    created = models.DateTimeField(auto_now_add=True)

signals.py for notification

@receiver(post_save, sender=Ticket)
def create_notification(sender, instance, created, **kwargs):
    if created:
        notification_type = &#39;created&#39;
    else:
        notification_type = &#39;updated&#39;
        
    assignees = instance.assignee.all()
    for assignee in assignees:
        Notification.objects.create(recipient=assignee, notification_type=notification_type)

this is createTicket function inside the views.py

@login_required
def createTicket(request):
    form = TicketForm()
    
    categories = Category.objects.all()
    users = CustomUser.objects.all()
    if request.method == &#39;POST&#39;:
        category_name = request.POST.get(&#39;category&#39;)
        category, created = Category.objects.get_or_create(name=category_name)
        
        # Retrieve the project object that the ticket should be connected with
        project_id = request.POST.get(&#39;project&#39;)
        project = Project.objects.get(id=project_id)
        
        # Retrieve the list of selected users from the form
        assignee_ids = request.POST.getlist(&#39;assignee&#39;)
        assignee = CustomUser.objects.filter(id__in=assignee_ids)
        
        ticket = Ticket.objects.create(
            host = request.user,
            category=category,
            project=project,
            name=request.POST.get(&#39;name&#39;),
            status=request.POST.get(&#39;status&#39;),
            priority=request.POST.get(&#39;priority&#39;),
            type=request.POST.get(&#39;type&#39;),
            description=request.POST.get(&#39;description&#39;),
        )
        
        # Add the selected users to the ticket
        ticket.assignee.set(assignee)
        ticket.save()
        
        return redirect(&#39;ticket&#39;, pk=ticket.id)
    
    context = {&#39;form&#39;: form, &#39;categories&#39;: categories, &#39;users&#39;: users}
    return render(request, &#39;tickets/ticket_form.html&#39;, context)

答案1

得分: 0

ticket = Ticket.objects.create(
            host=request.user,
            category=category,
            project=project,
            name=request.POST.get('name'),
            status=request.POST.get('status'),
            priority=request.POST.get('priority'),
            type=request.POST.get('type'),
            description=request.POST.get('description'),
        )
        
        # 将选择的用户分配给工单
        ticket.assignee.set(assignee)
        ticket.save()

这将触发两次信号,一次是create,另一次是save

你不需要最后一行,只需要写:

ticket.assignee.set(assignee)

就足够了。

另外,当你创建工单并且信号触发时,你还没有assignee,你应该通过m2m_changed信号来实际处理它。


<details>
<summary>英文:</summary>

ticket = Ticket.objects.create(
host = request.user,
category=category,
project=project,
name=request.POST.get('name'),
status=request.POST.get('status'),
priority=request.POST.get('priority'),
type=request.POST.get('type'),
description=request.POST.get('description'),
)

    # Add the selected users to the ticket
    ticket.assignee.set(assignee)
    ticket.save()

This will trigger your signals twice, 1 for `create` and another one for `save`.

You don&#39;t need the last line, just put 

ticket.assignee.set(assignee)

is enough.

Btw when you create a ticket and signal triggers, you don&#39;t have any `assignee` yet, you should actually do it via [m2m_changed][1] signal


  [1]: https://docs.djangoproject.com/en/4.1/ref/signals/#m2m-changed

</details>



huangapple
  • 本文由 发表于 2023年2月6日 08:52:58
  • 转载请务必保留本文链接:https://go.coder-hub.com/75356529.html
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