我对Django来说很新,这让我很难过。Django外键分配
我在调度工具的工作,有两个型号至今:
#----------------------------------------------------------------------------------
class ReccurenceEvent(models.Model):
"""
A recurrence event defined an event which recurses over a period of time. The pattern of the recursion
is defined within the rec_type attribute.
"""
event_id = models.IntegerField(primary_key=True)
start_date = models.DateTimeField()
end_date = models.DateTimeField()
text = models.CharField(max_length=30)
rec_type = models.CharField(max_length=32)
event_length = models.BigIntegerField(null=True)
#----------------------------------------------------------------------------------
class Event(models.Model):
"""
A an event represents an independent calender event.
If the event relates to a series, the p_id points to a particular ReccurencePattern
"""
event_id = models.IntegerField(primary_key=True)
start_date = models.DateTimeField()
end_date = models.DateTimeField()
text = models.CharField(max_length=30)
rec_type = models.CharField(max_length=32)
event_length = models.BigIntegerField(null=True)
event_pid = models.ForeignKey(ReccurenceEvent, null=True)
在某些情况下,我要分配父事件ID(event_pid)一个事件,但是这应该是一个整数值而不是对该对象的引用。
当我做到以下几点:
e.event_pid = event_pid
我得到以下信息:
Cannot assign "u'1359741862566'": "Event.event_pid" must be a "ReccurenceEvent" instance.
好了,但如果提供复发实例与:
e.event_pid = ReccurenceEvent.objects.get(event_id = event_pid)
我没有存储我需要的响应中的整数值。
有人能指出我要去哪里吗?
你构建模型的方式是错误的。您不需要放置主键,因为django会自动生成它 – catherine