假設(shè)我有兩個(gè)不同的應(yīng)用程序：teacher/models.py:  Teacher(models.Model):     name = models.CharField(max_length=300)class/models.py:  Class(models.Model):     name = models.CharField(max_length=300)     teacher = models.ForeignKey(Teacher)     students = models.ManyToManyField(Student)我想讓所有的老師上課和所有的課程都附上。我想要的結(jié)果：{[   teacher: '3L' #Teachers Id   classes: ['20L','14L','30L'] #list of Class objects or ids with the above teacher],[# similar to above]}這是可能的嗎？這就是我目前正在做的事情：classes = Class.objects.all()teachers = Teacher.objects.filter(id__in=classes.value_list('teacher',flat=True).distinct())for teacher in teachers:    classes_for_teachers = classes.objects.filter(teacher=teacher)在上面的代碼中，有四個(gè)使用循環(huán)進(jìn)行的查詢，這無疑增加了時(shí)間復(fù)雜度。有沒有更好的解決方案？提前致謝。