Python Django外键查询
我有一个这样的模型Python Django外键查询,python,django,Python,Django,我有一个这样的模型 Allmovie保存电影的名称, AllmovieTheater保存播放此电影的影院, 和AllMovieShowtime节省剧院的播放时间 class AllMovie(models.Model): link = models.URLField() title = models.CharField(max_length=100, null=True) releaseday = models.CharField(max_length=100, null
Allmovie
保存电影的名称,AllmovieTheater
保存播放此电影的影院,和
AllMovieShowtime
节省剧院的播放时间
class AllMovie(models.Model):
link = models.URLField()
title = models.CharField(max_length=100, null=True)
releaseday = models.CharField(max_length=100, null=True)
def __unicode__(self):
return '%s' % (self.title)
class AllMovieTheater(models.Model):
allmovietheater = models.ForeignKey(AllMovie,null=True,blank=True)
movie_theater = models.CharField(max_length=255, null=True)
def __unicode__(self):
return '%s' % (self.movie_theater)
class AllMovieShowtime(models.Model):
theater = models.ForeignKey( AllMovieTheater, null=True,blank=True,related_name = 'theater' )
movie = models.ForeignKey( AllMovie, null=True,blank=True,related_name = 'movie' )
time = models.CharField(max_length=100, null=True)
def __unicode__(self):
return '%s' % (self.time)
例如:
电影《ABC》在超级剧场和男子剧场上映我想知道超级剧场的演出时间
Movie | theater | showtime
ABC super theater 8:00
9:30
Movie | theater | showtime
ABC man theater 8:00
10:00
但我不知道如何去质疑它。
我的查询有错误:
>>>obj = AllMovie.objects.get(title='ABC')
<AllMovie: ABC>
>>>obj2 = allmovietheater_set.filter(movie_theater=’super theater')
[<AllMovieTheater: super theater>
>>>obj3 = obj2.theater_set.all()
AttributeError: 'QuerySet' object has no attribute 'theater_set'
obj=AllMovie.objects.get(title='ABC')
>>>obj2=allmovietheater\u set.filter(影剧院=‘超级影剧院’)
[
>>>obj3=obj2.theater\u set.all()
AttributeError:“QuerySet”对象没有属性“theater\u set”
请教我谢谢obj2是一个QuerySet对象 您应该像访问任何迭代器一样访问obj2的元素 对于您的情况,获取obj3的一种可能方式是:
obj3 = [x.theater_set.all() for x in obj2]
你有没有试过这样的方法:
AllMovieShowtime.objects.filter(movie__title="ABC",theater__movie_theater="super theater")
一部电影可以在多家影院放映,而一家影院放映多部电影。因此,“电影”模型和“影院”模型之间的关系应该是多对多关系,“放映时间”是用于控制这种关系的中间模型
class Movie(models.Model):
link = models.URLField()
title = models.CharField(max_length=100, null=True)
releaseday = models.CharField(max_length=100, null=True)
def __unicode__(self):
return '%s' % (self.title)
class Theater(models.Model):
movies = models.ManyToManyField(Movie, null=True, blank=True, through="ShowTime")
theater = models.CharField(max_length=255, null=True)
def __unicode__(self):
return '%s' % (self.movie_theater)
class ShowTime(models.Model):
theater = models.ForeignKey(Theater, null=True, blank=True)
movie = models.ForeignKey(Movie, null=True, blank=True)
time = models.CharField(max_length=100, null=True)
def __unicode__(self):
return '%s' % (self.time)
要了解电影“ABC”在影院“超级”的放映时间:
>>ShowTime.objects.filter(剧院、电影院、电影)
[, ]
>>>ShowTime.objects.filter(theater\uu theater=“super”,movie\uu title=“ABC”)[0]。时间
'8:00'
>>>ShowTime.objects.filter(theater\uu theater=“super”,movie\uu title=“ABC”)[1]。时间
'10:00'
谢谢!我编辑了许多关于south的文件,但是迁移花了很长时间,我不知道它是在运行还是应该关闭。你知道这个问题吗?
>>> ShowTime.objects.filter(theater__theater="super", movie__title="ABC")
[<ShowTime: ShowTime object>, <ShowTime: ShowTime object>]
>>> ShowTime.objects.filter(theater__theater="super", movie__title="ABC")[0].time
'8:00'
>>> ShowTime.objects.filter(theater__theater="super", movie__title="ABC")[1].time
'10:00'