Django-model一对多关系查询

from django.db import models# Create your models here.class Question(models.Model):    question_text = models.CharField(max_length=200)    pub_date = models.DateTimeField(verbose_name='date published')class Choice(models.Model):    question = models.ForeignKey(Question)    choice_text = models.CharField(max_length=200)    votes = models.IntegerField(default=0)

一(Question)对多(Choice)关系

1.前向查询

# 通过Choice类中的question字段属性Choice.objects.filter(question__pub_date__year=current_year)

2.反向查询

# 通过classname_setq=Question.objects.get(pk=1)q.choice_set.filter(choice_text__startswith='Just hacking')