我想做以下事情,但我不明白我该怎么做:
给我看每个班级的所有学生,给我看这个班级的每个学生的所有统计数据。你知道吗
我的模型是:
class Classes(models.Model):
name = models.CharField(max_length=256)
day_and_time= models.CharField(max_length=256)
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse("classesapp:class_detail", kwargs={"pk": self.pk})
class Students(models.Model):
name = models.CharField(max_length=256)
student_class = models.ForeignKey(
Classes, related_name = 'students', on_delete=models.SET_NULL, null=True
)
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse("classesapp:student_detail", kwargs={"pk": self.pk})
class Statistics(models.Model):
student= models.ForeignKey(
Students, related_name='statistics', on_delete=models.CASCADE, null=True
)
date = models.DateField(blank=True, null=True)
dictation_score = models.FloatField()
writing_score = models.FloatField()
test_score = models.FloatField()
grammar_score = models.FloatField()
in_class_performance = models.FloatField()
class Meta:
ordering = ["-date"]
def get_absolute_url(self):
return reverse("classesapp:classes_list")
我的ClassesDetailView是:
class ClassesDetailView(DetailView):
queryset = models.Classes.objects.select_related('statistics')
context_object_name = "class_detail"
model = models.Classes
template_name = "classesapp/class_detail.html"
我知道我必须覆盖查询集,我尝试选择\u relatad,但仍然找不到解决方案。 提前谢谢!你知道吗
它将通过2个循环。根据您的模型,
class
可以有许多students
,student
可以有许多statistics
。更新:
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