在django admin中显示来自m2m_changed信号的验证错误

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

@receiver(m2m_changed, sender=YourModel.your_m2m_field.through)
def your_signal_handler(sender, instance, **kwargs):
    # 在这里进行验证逻辑
    # 如果有错误，可以使用`ValidationError`来抛出错误
    pass

from django.core.exceptions import ValidationError

@receiver(m2m_changed, sender=YourModel.your_m2m_field.through)
def your_signal_handler(sender, instance, **kwargs):
    # 在这里进行验证逻辑
    if some_condition:
        raise ValidationError("验证错误信息")

from django.contrib import admin
from django import forms

class YourModelAdminForm(forms.ModelForm):
    def clean(self):
        cleaned_data = super().clean()
        
        # 在这里获取验证错误信息并将其添加到表单的`non_field_errors`中
        try:
            YourModel.objects.validate_m2m_related_fields(cleaned_data)
        except ValidationError as e:
            self.add_error(None, e)
        
        return cleaned_data

class YourModelAdmin(admin.ModelAdmin):
    form = YourModelAdminForm

admin.site.register(YourModel, YourModelAdmin)