Django的。如何为当前用户编写过滤器?

时间:2019-03-12 09:12:52

标签: django django-admin instance-variables django-users django-filters

清单应用程序具有清单表:

class Listing(models.Model):
    realtor = models.ForeignKey(Realtor, on_delete=models.CASCADE, verbose_name='Риэлтор')
    region = models.CharField(default="Чуйская", max_length=100, verbose_name='Область')
    city = models.CharField(default="Бишкек", max_length=100, verbose_name='Город')
    district = models.CharField(blank=True, max_length=100, verbose_name='Район')
    title = models.CharField(max_length=200, verbose_name='Заголовок')
    address = models.CharField(blank=True, max_length=200, verbose_name='Адрес')
    description = models.TextField(blank=True, verbose_name='Описание') 
    stage = models.IntegerField(blank=True, verbose_name='Этажность')
    rooms = models.IntegerField(blank=True, verbose_name='Количество комнат')   
    garage = models.IntegerField(default=0, blank=True, verbose_name='Гараж')
    sqmt = models.IntegerField(blank=True, verbose_name='Площадь')
    price = models.IntegerField(blank=True, verbose_name='Цена')
    photo_main = models.ImageField(upload_to='photos/%Y/%m/%d/', blank=True, verbose_name='Основное фото')
    photo_1 = models.ImageField(upload_to='photos/%Y/%m/%d/', blank=True, verbose_name='Фото 1')
    photo_2 = models.ImageField(upload_to='photos/%Y/%m/%d/', blank=True, verbose_name='Фото 2')
    photo_3 = models.ImageField(upload_to='photos/%Y/%m/%d/', blank=True, verbose_name='Фото 3')
    photo_4 = models.ImageField(upload_to='photos/%Y/%m/%d/', blank=True, verbose_name='Фото 4')
    photo_5 = models.ImageField(upload_to='photos/%Y/%m/%d/', blank=True, verbose_name='Фото 5')
    photo_6 = models.ImageField(upload_to='photos/%Y/%m/%d/', blank=True, verbose_name='Фото 6')
    is_published = models.BooleanField(default=True, verbose_name='Публично')
    list_date = models.DateTimeField(default=datetime.now, blank=True, verbose_name='Дата публикации')

    def __str__(self):
        return self.title

    class Meta:
        verbose_name = 'Объявление'
        verbose_name_plural = 'Объявления'

在房地产经纪人应用程序中,有一个房地产经纪人模型:

class Realtor(models.Model):
    user_name = models.OneToOneField(User, on_delete=models.CASCADE, verbose_name='Пользователь', related_name='realtor')
    name = models.CharField(max_length=20, verbose_name='Имя')
    photo = models.ImageField(upload_to='photos/%Y/%m/%d/', verbose_name='Фото')
    description = models.TextField(blank=True, verbose_name='Описание')
    phone = models.CharField(max_length=20, verbose_name='Телефон')
    email = models.CharField(max_length=50, verbose_name='Email')
    is_mvp = models.BooleanField(default=False, verbose_name='Реэлтор месяца')
    hire_date = models.DateTimeField(default=datetime.now, blank=True, verbose_name='Дата приёма на работу')

    def __str__(self):
        return self.name

    class Meta:
        verbose_name = 'Риэлтор'
        verbose_name_plural = 'Риэлторы'

在帐户应用程序中,有一个功能,在个人帐户中,仅当当前用户在系统中时才显示广告:

    from django.shortcuts import render, redirect
    from django.contrib.auth.models import User
    from listings.models import Listing
    from realtors.models import Realtor

    def dashboard(request):
      listings = Listing.objects.order_by('-list_date').filter(user_name=request.user)

      paginator = Paginator(listings, 6)
      page = request.GET.get('page')
      paged_listings = paginator.get_page(page)

      context = {
        'listings': paged_listings
      }
      return render(request, 'accounts/dashboard.html', context
)

如何正确注册此过滤器,以便一切正常,以便显示当前用户的广告:

listings = Listing.objects.order_by('-list_date').filter(user_name=request.user)

此刻,此错误:

无法将关键字“用户名”解析为字段。选项包括:地址,城市,描述,地区,车库,ID,已发布,列表日期,照片_1,照片_2,照片_3,照片_4,照片_5,照片_6,照片主,价格,房地产经纪人,房地产经纪人ID,区域,房间,平方尺,舞台,标题

谁并不困难,请帮助。预先谢谢你。

2 个答案:

答案 0 :(得分:2)

由于user_name中没有Listing字段,因此尝试对此进行过滤是错误的。

相反,您大概是想对房地产经纪人进行过滤,这可以通过lookup that spans relationships来完成:

listings = Listing.objects.order_by('-list_date').filter(realtor__user_name=request.user)

答案 1 :(得分:1)

user_name是Realtor模型上的字段,而不是清单上的字段。这两个模型是通过外键连接的,因此您需要使用双下划线语法遍历该关系。

Listing.objects.order_by('-list_date').filter(realtor__user_name=request.user)

请注意,user_name是该字段的一个非常奇怪的名称;它不是名称,而是User对象本身。应该只叫user