在Django管理员端对具有相同数据的模型的my-sql列对象进行分组

Question

I have a model with the following definition

class exam_questions(models.Model):
    exam_name=models.ForeignKey(exam,on_delete=models.CASCADE)
    question=models.ForeignKey(questions,on_delete=models.CASCADE)

class Meta:
    db_table = 'examquestions'
    unique_together = (("exam_name", "question"),)

def __str__(self):
    return '%s - %s' % (self.exam_name, self.question)

The data on sql table will look like this

+----+----------------+-------------+
| id | exam_name      | question    |
+----+----------------+-------------+
|  2 |          test2 |          29 |
|  3 |          test1 |          41 |
|  6 |          test2 |          40 |
|  7 |          test1 |          42 |
+----+----------------+-------------+

On Django admin I am looking the model objects like the following:

test2-29

test1-41

test2-40

test1-42

Now I want to group questions of same test and want to look them like the below:

test2-29,40

test1-41,42

I tried using normal python string operations, none of them worked on amdin django instead gave me errors.

Is there way for doing this. Any help is greatly appreciated.

Thanks

Answer 1

You can override objects manager in this way  :- 
class ExamManager(models.Manager):
    def get_queryset(self):
       return super(ExamManager,self).get_queryset().group_by('exam_name')

class exam_questions(models.Model):
    exam_name=models.ForeignKey(exam,on_delete=models.CASCADE)
    question=models.ForeignKey(questions,on_delete=models.CASCADE)
    objects = ExamManager()