Django admin中自定义列表筛选的重复结果
我试图在Django Admin中执行自定义过滤器,但在我的例子中,当我基于家长和教师进行过滤时,似乎会得到重复的值。意思是说父母的数量(481)比总数(221)多。有些值会重复。。我如何避免这种情况?有什么想法吗 admin.py:Django admin中自定义列表筛选的重复结果,django,django-admin,Django,Django Admin,我试图在Django Admin中执行自定义过滤器,但在我的例子中,当我基于家长和教师进行过滤时,似乎会得到重复的值。意思是说父母的数量(481)比总数(221)多。有些值会重复。。我如何避免这种情况?有什么想法吗 admin.py: class AdultRoleListFilter(SimpleListFilter): title = _('Role of Adult') parameter_name = 'adultrole' def lookups(self,
class AdultRoleListFilter(SimpleListFilter):
title = _('Role of Adult')
parameter_name = 'adultrole'
def lookups(self, request, model_admin):
return (
('T', _('Teacher')),
('P', _('Parent')),)
def queryset(self, request, queryset):
if self.value() == 'P':
return queryset.filter(relationships__role='P')
if self.value() == 'T':
return queryset.filter(relationships__role='T')
Models.py
class Student(models.Model):
name = models.CharField(max_length=255)
birthday= models.DateField(blank=True,null=True)
class Adult(models.Model):
user = models.OneToOneField(User)
students = models.ManyToManyField(Student, through='StudentAdultRelationship', related_name='adults')
class class StudentAdultRelationship(models.Model):
PARENT = 'P'
TEACHER ='T'
FOLLOWER = 'F'
ROLE_CHOICES = (
(PARENT, 'Parent'),
(TEACHER, 'Teacher'),
(FOLLOWER, 'Follower'),
)
adult = models.ForeignKey(Adult, related_name='relationships')
student = models.ForeignKey(Student, related_name='relationships')
role = models.CharField(choices=ROLE_CHOICES, max_length=1)
需要一些指导….同一个学生必须存在多种关系;假设一名学生有3名成人角色
P
将返回3名学生;您必须向您的查询集添加distinct()
调用,以确保学生的唯一性。同一学生必须存在多个关系;假设一名学生有3名成人角色P
将返回3名学生;您必须向您的QuerySet
添加一个distinct()
调用,以确保学生的独特性。它应该放在哪里?它是不同的(queryset.filter(relationships__role='P'))?@lakesh;queryset.filter().distinct()它到底应该放在哪里?它是不同的(queryset.filter(relationships__role='P'))?@lakesh;queryset.filter().distinct()