我正在编写门户网站来管理任务，我创建了以下所示的模型
以及下面显示的以下视图，在HTML（如下所示）中，我的部分显示了最近30天的最新任务，
[当我循环执行可能具有多个子任务的每个主任务时，我想例如显示与子任务相关的用户和详细信息，我知道如何从主模型类数据中获取数据，但是我不知道如何从外键子模型检索与其主模型关联的数据。
例如，如何显示与主任务相关联的子任务的所有用户
task_assign = models.ForeignKey(User, on_delete=models.CASCADE, related_name="task_assign",default=1)
或任何其他类似的任务，例如与主任务相关的所有子任务描述
task_description = models.CharField(max_length=200)
请咨询
谢谢
class IndexView(TemplateView):
template_name = 'index.html'
def get_context_data(self, **kwargs):
context = super(IndexView, self).get_context_data(**kwargs)
#filter active runing tasks
context['active_tasks'] = MainTask.objects.filter(complete=False).count()
#All oobjects main Task
context['maintask'] = MainTask.objects.all()
#All objects Subtask
context['childtask'] = MainTask.item_main.all()
#filter task due date
#due_range =
context['due_task'] = MainTask.objects.filter(due_date__day__lte=7, complete=False).count()
#task paused
context['task_paused'] = MainTask.objects.filter(task_status='PA', complete=False).count()
#task paused
context['task_completed'] = MainTask.objects.filter(task_status='CO', complete=True).count()
#task paused
context['task_started'] = MainTask.objects.filter(task_status='NS', complete=True).count()
###query for dashboard
#recent tasks query
context['recent_task'] = MainTask.objects.filter(created_at__gte=datetime.now()-timedelta(days=30), complete=False)
#Current date time
now = timezone.now()
context['current_time'] = now
return context
class MainTask(models.Model):
task_title = models.CharField(max_length=200)
global_task_info = models.TextField(max_length=500,default=None)
complete = models.BooleanField(default=False)
overall_precent_complete = models.PositiveIntegerField(default=0)
created_at = models.DateTimeField(default=datetime.datetime.now())
updated_at = models.DateTimeField(default=datetime.datetime.now())
due_date = models.DateTimeField(default=datetime.datetime.now())
global_task_assign = models.ForeignKey(User, on_delete=models.CASCADE, related_name="global_task_assign",default=1)
TASK_STATUS_CHOICES = [
('ST', 'STARTED'),
('NS', 'NOT STARTED'),
('IP', 'IN PROGRESS'),
('PA', 'PAUSED'),
('CO', 'COMPLETED'),
]
task_status = models.CharField(max_length=2,choices=TASK_STATUS_CHOICES,default='NOT STARTED')
def __str__(self):
return self.task_title
class ChildTask(models.Model):
# Relationship Fields
item_main = models.ForeignKey('ittasks.MainTask',on_delete=models.CASCADE, related_name="item_main", )
task_description = models.CharField(max_length=200)
task_info = models.TextField(blank = True)
task_complete = models.BooleanField(default=False)
sub_task = models.CharField(max_length=200)
task_precent_complete = models.PositiveIntegerField(default=0)
task_created = models.DateTimeField(default=datetime.datetime.now())
task_updated_at = models.DateTimeField(default=datetime.datetime.now())
task_due_date = models.DateTimeField(default=datetime.datetime.now())
task_assign = models.ForeignKey(User, on_delete=models.CASCADE, related_name="task_assign",default=1)
def __str__(self):
return self.task_description
{% if recent_task %}
{% for rtasks in recent_task %}
<div class="card m-b-0">
<div class="card-header" id="heading-{{ rtasks.id }}">
<h5 class="mb-0">
<a class="artasks" data-toggle="collapse" data-target="#collapse-{{ rtasks.id }}" aria-expanded="true" aria-controls="collapse-{{ rtasks.id }}">
<i class="m-r-5 fas fa-th-list" aria-hidden="true"></i>
<span>{{rtasks.task_title}}</span>
</a>
</h5>
</div>
<div id="collapse-{{ rtasks.id }}" class="collapse show" aria-labelledby="heading-{{ rtasks.id }}" data-parent="#accordionExample">
<div class="card-body">
<span class="todo-desc">{{rtasks.task_title}}</span> <span class="badge badge-pill badge-danger float-right">{{ current_time|timeuntil:rtasks.created_at }}</span>
<ul class="list-inline">
<li class="assignee list-inline-item"><img class="rounded-circle" width="40" src="../../assets/images/users/1.jpg" alt="user" data-toggle="tooltip" data-placement="top" title="" data-original-title="Steave"></li>
<li class="assignee list-inline-item"><img class="rounded-circle" width="40" src="../../assets/images/users/2.jpg" alt="user" data-toggle="tooltip" data-placement="top" title="" data-original-title="Jessica"></li>
<li class="assignee list-inline-item"><img class="rounded-circle" width="40" src="../../assets/images/users/3.jpg" alt="user" data-toggle="tooltip" data-placement="top" title="" data-original-title="Priyanka"></li>
<li class="assignee list-inline-item"><img class="rounded-circle" width="40" src="../../assets/images/users/4.jpg" alt="user" data-toggle="tooltip" data-placement="top" title="" data-original-title="Selina"></li>
</ul>
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<div class="d-flex no-block align-items-center m-t-25">
<span>{{rtasks.overall_precent_complete}}% Impressions</span>
<div class="ml-auto">
<span>{{rtasks.overall_precent_complete}}</span>
</div>
</div>
<div class="progress">
<div class="progress-bar progress-bar-striped bg-info" role="progressbar" style="width: 53%" aria-valuenow="50" aria-valuemin="0" aria-valuemax="100"></div>
</div>
<div class="comment-footer mt-3">
<span class="text-muted float-right">April 14, 2016</span>
<button type="button" class="btn btn-cyan btn-sm">View</button>
<button type="button" class="btn btn-success btn-sm">Publish</button>
<button type="button" class="btn btn-danger btn-sm">Delete</button>
</div>
</div>
</div>
</div>
{% endfor %}
{% endif %}
从此开始在视图中：
your_obj = Your_Model_Class.objects.get(id=1)
context = {
"your_obj" : your_obj,
}
然后将对象通过视图的上下文传递到模板。
在模板中：
<p> {{ your_obj.your_model_field }} </p>
然后在外键字段中，可能需要更深一层。
<p> {{ your_obj.your_model_field.your_foreign_key_field }} </p>
我希望有帮助。