Django 教程 selection_set

Question

来自 Django 教程:

我已经定义了我的模型如下:

from django.db import models
import datetime
from django.utils import timezone

# Create your models here.

class Poll(models.Model):
    question = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')
    def __unicode__(self):  # Python 3: def __str__(self):
        return self.question
    def was_published_recently(self):
        return self.pub_date >= timezone.now() - datetime.timedelta(days=1)

class Choice(models.Model):
    poll = models.ForeignKey(Poll)
    choice_text = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)
    def __unicode__(self):  # Python 3: def __str__(self):
        return self.choice_text

choice_set 在哪里定义以及它是如何工作的？

>>> p = Poll.objects.get(pk=1)

# Display any choices from the related object set -- none so far.
>>> p.choice_set.all()

Answer 1

我不知道你想要多深的解释，但是当你做的时候 Django 会为你定义 poll = models.ForeignKey(Poll) .

You can read here about it.