Python django在多个字段上使用order_by()分页重复
我正在对来自多个对象的时间字段上的查询进行排序,但在分页过程中遇到问题 models.py:Python django在多个字段上使用order_by()分页重复,python,django,pagination,sql-order-by,annotate,Python,Django,Pagination,Sql Order By,Annotate,我正在对来自多个对象的时间字段上的查询进行排序,但在分页过程中遇到问题 models.py: class Validated(models.Model): job_id_list = models.ManyToManyField(JobId , related_name='JobId', blank=True) class JobId(models.Model): user = models.ForeignKey(User, blank=True, null=True, d
class Validated(models.Model):
job_id_list = models.ManyToManyField(JobId , related_name='JobId', blank=True)
class JobId(models.Model):
user = models.ForeignKey(User, blank=True, null=True, default=None)
job_time = models.DateTimeField(auto_now_add=True)
class ValidatedManager(models.Manager):
**%%function-logic%%**
def date(self, user, id):
xlinkdatabase_validated_object = self.get(id=id)
job_id_list = xlinkdatabase_validated_object.\
job_id_list.all().order_by('-job_time')
date_added = None
for item in job_id_list:
if item.user == user:
date_added = item.job_time
break
return date_added
def get_queryset2(self, user):
qs = super(XlinkdatabaseValidatedManager, self).\
get_queryset().annotate(job_date= **%%function-logic%%**, output_field=DateTimeField())
return qs
views.py:
results_list = Validated.objects.filter(job_id_list__user=request.user).\
distinct().order_by('-job_id_list__job_time')
results_list = xlinkdatabase_validated.objects.get_queryset2(request.user).\
filter(job_id_list__user=request.user).distinct().order_by('-job_date')
我的问题是分页被弄乱了,我在分页输出中得到了重复项,即使查询输出正常。(有问题)
我尝试了几种解决方案,但我的问题没有得到解决,因为排序是基于多对多对象的字段order\u by('job\u id\u list\u job\u time')
我正在考虑通过使用model.Manager
为我的模型创建注释
来解决问题。在这个注释中,我尝试添加job\u time
,这是模型内部函数的结果。这样,工作时间就很容易获得:
for i in result_list:
job_time_from_model = result_list[i].job_time
我会按照下面的方法进行操作,但是我不知道如何将%%函数逻辑%
合并到注释中。
这样做是可能的还是需要另一种方法
models.py:
class Validated(models.Model):
job_id_list = models.ManyToManyField(JobId , related_name='JobId', blank=True)
class JobId(models.Model):
user = models.ForeignKey(User, blank=True, null=True, default=None)
job_time = models.DateTimeField(auto_now_add=True)
class ValidatedManager(models.Manager):
**%%function-logic%%**
def date(self, user, id):
xlinkdatabase_validated_object = self.get(id=id)
job_id_list = xlinkdatabase_validated_object.\
job_id_list.all().order_by('-job_time')
date_added = None
for item in job_id_list:
if item.user == user:
date_added = item.job_time
break
return date_added
def get_queryset2(self, user):
qs = super(XlinkdatabaseValidatedManager, self).\
get_queryset().annotate(job_date= **%%function-logic%%**, output_field=DateTimeField())
return qs
views.py:
results_list = Validated.objects.filter(job_id_list__user=request.user).\
distinct().order_by('-job_id_list__job_time')
results_list = xlinkdatabase_validated.objects.get_queryset2(request.user).\
filter(job_id_list__user=request.user).distinct().order_by('-job_date')