Question

我有两个连接的模型。

模型1是 userprofiles ，模型2是事件
每个用户可以拥有多个事件......每个事件都可以激活或停用。

我在模板中有一个for循环，显示所有用户配置文件...但我还想显示每个用户有多少活动事件。

today = datetime.now().strftime('%Y-%m-%d')
perm = Permission.objects.get(codename='chef_user')
user_profiles = User.objects.filter(profile__user_profile_active='y').filter(is_active=True).filter(Q(groups__permissions=perm) | Q(user_permissions=perm)).distinct()[:6]

在模板中我有我的循环

{% for kitchen_list in user_profiles %}
-- CODE --
{{ kitchen_list.events_set.count }} <--- WHERE I AM TRYING TO SHOW ACTIVE EVENTS COUNT
--CODE--
{% endfor %}

我的模特：

class UserProfile(models.Model):

    EVENT_TYPE = (('0', "Apartment"), ('1', "Home"),)
    CURRENCY = (('R', "Rand"),)
    OPTIONS = (('y', "Yes"),('n', "No"),)
    OPTIONS_USER = (('y', "Yes"), ('n', "No"),('p', "Pending"),)

    user = models.OneToOneField(User, related_name='profile')
    phone_regex = RegexValidator(regex=r'^\+?1?\d{9,12}$', message="Phone number must be entered in the format: '+999999999'. Up to 15 digits allowed.")
    phone = models.CharField(validators=[phone_regex], max_length=12, default='', blank=True)  # validators should be a list

    currency = models.CharField(max_length=50, blank=True, default='R', choices=CURRENCY)
    bookingpermissions = models.CharField(max_length=100, blank=True, default='n', choices=OPTIONS)
    title = models.CharField(max_length=50, default='', blank=True)
    bio = models.TextField(max_length=500, default='', blank=True)
    city = models.CharField(max_length=100, default='', blank=True)
    longitude = models.CharField(max_length=100, default='na', blank=True)
    latitude = models.CharField(max_length=100, default='na', blank=True)
    image = ResizedImageField(size=[400, 400], crop=['middle', 'center'], upload_to='userprofile/static/images', default='', blank=True)
    kitchen_type = models.CharField(max_length=50, blank=True, default='a', choices=EVENT_TYPE)
    user_profile_active = models.CharField(max_length=1, default='n', blank=True, choices=OPTIONS_USER)


class Events(models.Model):

    ACTIVE = (('d', "Deactivated"), ('e', "Expired"), ('a', "Active"), ('b', "Drafts"),)
    ALCOHOL = (('0','No bring own alcohol'),('1','There will be complimentary wine pairing'))

    user = models.ForeignKey(User, on_delete=models.CASCADE)
    active = models.CharField(max_length=1, default='b', choices=ACTIVE)
    title = models.CharField(max_length=50, blank=True, default='')
    description = models.TextField(max_length=500, blank=True, default='')
    date = models.DateField()
    time = models.TimeField()
    price = models.CharField(max_length=240, blank=True, default='')
    seats = models.IntegerField()
    alcohol_choice = models.CharField(max_length=1, default='n' ,choices=ALCOHOL)
    starter = models.TextField(max_length=350, blank=True, default='')
    main_menu = models.TextField(max_length=350, blank=True, default='')
    dessert = models.TextField(max_length=350, blank=True, default='')
    notes = models.TextField(max_length=350, blank=True, default='')
    created_date = models.DateTimeField(auto_now_add=True)
    modified_date = models.DateTimeField(auto_now=True)

    def __unicode__(self):
        return self.title

Answer 1

你可以试试使用模型

模特中的

：

class UserProfile(models.Model):
     # You code here
     @property
     def active_events(self):
         return self.user.events_set.filter(active='a').count()

模板中的

：

{{ kitchen_list.userprofile.active_events }}

Answer 2

而是在views.py而不是模板中进行计数，然后将值传递给模板。假设您在模型中很好地建立了外交关系，那么在视图中执行以下操作： user_profiles = User.objects.filter(profile__user_profile_active='y').filter(is_active=True) counts = user_profiles.events_set.count()

然后将其作为上下文传递。或者您可以尝试在模型UserProfile中创建方法：

class UserProfile:
....
def events(self):
    return self.events_set.count()

获取模型过滤器以显示活动值的计数

2 个答案: