Django反向查找外键 [英] Django reverse lookup of foreign keys
本文介绍了Django反向查找外键的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
class Event(models.Model):
title = models.CharField(max_length = 200)
date_published = models.DateTimeField('published date',default = datetime.now,blank = True)
date_start = models.DateTimeField('start date')
date_end = models。 DateTimeField('end date')
def __unicode __(self):
return self.title
description = models.TextField()
price = models.IntegerField(null = True,空白=真)
场地= models.ForeignKey(Venue)
class Venue(models.Model):
title = models.CharField(max_length = 200)
date_published = models.DateTimeField('published date',default = datetime.now,blank = True)
places_latitude = models.CharField(max_length = 200)
places_longitude = models.CharField(max_length = 200)
places_address = models.CharField(max_length = 200)
places_city = models.CharField(max_length = 200)
venue_state = models.CharField(max_length = 200)
places_country = models.CharField(max_length = 200)
description = models.TextField()
def __unicode __(self):
return u '%s'%(self.title)
我想显示所有的事件发生在某个地点。我怎样才能做到这一点?我现在的视图看起来像:
def detail(request,venue_id):
场地= get_object_or_404(Venue,pk = ($)
返回呈现(请求,'场地 - detail.html',{'场地' div class =h2_lin>解决方案
您可以使用 events = places.event_set
去另一种方式
请参阅 Django文档
I have a venue, this venue has many events happening there. My models look like this:
class Event(models.Model):
title = models.CharField(max_length=200)
date_published = models.DateTimeField('published date',default=datetime.now, blank=True)
date_start = models.DateTimeField('start date')
date_end = models.DateTimeField('end date')
def __unicode__(self):
return self.title
description = models.TextField()
price = models.IntegerField(null=True, blank=True)
venue = models.ForeignKey(Venue)
class Venue(models.Model):
title = models.CharField(max_length=200)
date_published = models.DateTimeField('published date',default=datetime.now, blank=True)
venue_latitude = models.CharField(max_length=200)
venue_longitude = models.CharField(max_length=200)
venue_address = models.CharField(max_length=200)
venue_city = models.CharField(max_length=200)
venue_state = models.CharField(max_length=200)
venue_country = models.CharField(max_length=200)
description = models.TextField()
def __unicode__(self):
return u'%s' % (self.title)
I'd like to display all the events that are happening at a certain venue. How can I do that? My current view looks like:
def detail(request, venue_id):
venue = get_object_or_404(Venue, pk=venue_id)
return render(request, 'venue-detail.html', {'venue': venue})
解决方案
You can use events = venue.event_set
to go the other way
See the Django documentation
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