django - 姜戈。如何为当前用户编写过滤器?
问题描述
列表应用程序有一个列表表:
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'
在账户应用中,有一个功能是在个人账户中只显示当前用户在系统中的广告:
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)
目前,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、is_published、list_date、photo_1、photo_2、photo_3、photo_4、photo_5、photo_6、photo_main、price、realtor、realtor_id、region、rooms、sqmt、stage、title
谁不难,请帮忙。先感谢您。
解决方案
由于 中没有user_name
字段Listing
,因此尝试对其进行过滤是错误的。
相反,您可能正在尝试过滤房地产经纪人,这可以通过跨越关系的查找来完成:
listings = Listing.objects.order_by('-list_date').filter(realtor__user_name=request.user)
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