我是python和Django的初学者,正在做我的第一个项目。我一步一步地克服了几乎所有遇到的困难,但有一个问题使我陷入困境,我不知道如何解决它。
目标是显示当前在特定游乐场的每个用户的子级。它应该是这样的:我有一个特定用户的“当前访问”,我想显示他/她的孩子/孩子。我不想选择哪个孩子和他/她的父母在操场上,在这个阶段,我假设所有可能的孩子都和他/她的父母在一起:)
以下是我的模型:
class Quarter(models.Model):
name = models.CharField(max_length=64, choices=QUARTER, default='not defined')
class Pground(models.Model):
place = models.CharField(max_length=128)
description = models.TextField()
quarter = models.ForeignKey(Quarter)
class Child(models.Model):
name = models.CharField(max_length=128)
age = models.IntegerField(choices=AGE, default=-1)
sex = models.IntegerField(choices=SEX, default=1)
whose_child = models.ForeignKey(User)
class Parent(models.Model):
user = models.OneToOneField(User)
quarter = models.ForeignKey(Quarter)
children = models.ManyToManyField(Child)
class Visit(models.Model):
who = models.ForeignKey(User)
pground = models.ForeignKey(Pground)
time_from = models.DateTimeField()
time_to = models.DateTimeField()
到目前为止,相关观点是这样的:
class HomeLogView(LoginRequiredMixin, View):
login_url = '/login/'
def get(self, request):
user = request.user
quarter = user.parent.quarter
pgrounds = quarter.pground_set.all()
current_visits = {}
for pground in pgrounds:
now = datetime.now()
current_visits[pground] = pground.visit_set.filter(time_from__lte=now, time_to__gte=now)
current_visits[pground] = {}
this_visits = pground.visit_set.filter(time_from__lte=now, time_to__gte=now)
for visit in this_visits:
current_visits[pground][visit] = Child.objects.filter(whose_child=visit.who)
this_children = Child.objects.filter(whose_child=visit.who)
ctx = {'user': user, 'quarter': quarter, 'pgrounds': pgrounds, 'current_visits': current_visits, 'this_visits': this_visits, 'this_children': this_children}
return TemplateResponse(request, 'home_login.html', ctx)
因此,对于模板(部件):
<dt>{% for pground, current_visits in current_visits.items %}
<dd><h3>{{pground.place}}</h3></dd>
{% for visit in current_visits %}
<dd>Użytkownik: <mark>{{visit.who}}</mark> na placyku od: {{visit.time_from}}
do: {{visit.time_to}} {{visit.pground}} <a href="/new_message/{{visit.who.id}}">Send message</a></dd>
{% for visit, this_visits in current_visits.items %}
{% for child in this_visits %}
{{child.name}} {{child.age}}
{% endfor %}
{% endfor %}
{% endfor %}
{% endfor %}
</dt>
每次去一个特定的游乐场,都会有一整套孩子在场。但我的目标是用这种模式显示信息:对于每次“当前访问”,基于父母、他/她的孩子/孩子。你知道吗
如果你能给我一个建议,告诉我如何离开我被困的地方,我会非常感激的。提前感谢您的帮助!你知道吗
在父模型和子模型中设置相关的\u名称,如
在查询时,您可以修改您的查询,如:
假设父母和孩子是你的相关名字。你知道吗
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