将上下文传递到many2many字段

from django.db import models
from django.dispatch import receiver
from django.db.models.signals import m2m_changed

class MyModel(models.Model):
    name = models.CharField(max_length=100)
    related_objects = models.ManyToManyField('RelatedModel')

@receiver(m2m_changed, sender=MyModel.related_objects.through)
def handle_related_objects(sender, instance, action, reverse, model, pk_set, **kwargs):
    if action == 'pre_add':
        # 获取上下文信息，例如当前用户的权限
        context = kwargs.get('context')
        
        # 根据上下文信息对关联对象进行过滤或其他操作
        filtered_pk_set = filter_related_objects(context, pk_set)
        
        # 更新关联对象
        instance.related_objects.set(filtered_pk_set)

def filter_related_objects(context, pk_set):
    # 根据上下文信息对关联对象进行过滤或其他操作
    # 返回过滤后的关联对象的主键集合
    return filtered_pk_set

class MyModel(models.Model):
    name = models.CharField(max_length=100)
    related_objects = models.ManyToManyField('RelatedModel')

    def save(self, *args, **kwargs):
        # 获取上下文信息，例如当前用户的权限
        context = kwargs.pop('context', None)
        
        super().save(*args, **kwargs)
        
        # 发送信号并传递上下文信息和关联对象
        m2m_changed.send(sender=self.__class__, instance=self, action='pre_add', reverse=False, model=RelatedModel, pk_set=self.related_objects.all().values_list('pk', flat=True), context=context)