[英]Search query on more than one model in Django
我有兩個模型:
class City(models.Model):
name = models.CharField(max_length=50, verbose_name='Qyteti')
slug = models.SlugField(unique=True)
class Business(models.Model):
name = models.CharField(max_length=120, verbose_name='emri')
slug = models.SlugField(unique=True)
city = models.OneToOneField(City, verbose_name='qyteti')
created = models.DateTimeField(auto_now_add=True, verbose_name='krijuar')
categories = models.ForeignKey(Category, related_name='businesses', verbose_name='kategoria')
user = models.ForeignKey(User, related_name='user_businesses', verbose_name='autori')
geom = gis_models.PointField(u"longitude/latitude", geography=True, blank=True, null=True)
我希望人們以三種不同的方式進行搜索。
我已經嘗試過從itertools鏈,但到目前為止沒有結果。
我現在想做一個簡單的搜索,而不是使用外部搜索引擎。
感謝任何人的幫助。
您需要執行以下操作:
1)更改模型:
class Business(models.Model):
city = models.ForeignKey(City, verbose_name='qyteti', related_name='businesses')
2)查詢:
1) one_type = Business.objects.filter(name = "some_business_type").select_related('city')
one_type.city.name
2) one_city_all_business = City.objects.filter(name = "London").prefetch_related('businesses')
one_city_all_business.businesses.all() - here u get a list of all businesses for London
3) one_type_one_city = City.objects.filter(name = "London").filter(businesses__name = "some_business_type").prefetch_related('businesses')
這里唯一的問題-您需要確定用戶將如何選擇要運行的查詢,這意味着您將如何定義用戶要搜索的內容。
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