我想將項目從可用經典添加到所選經典我怎么能這樣做，如下圖所示我可以得到選擇經典Profile.objects.get(user=request.user).classic.add(id=2)但我無法將iems從可用經典添加到所選經典任何人都可以幫助這個問題快速請感謝所有Models.pyfrom django.db import models# Create your models here.from django.utils import timezonefrom django.contrib.auth.models import Userfrom django.db.models.signals import post_savefrom django.dispatch import receiverclass Language(models.Model):    language = models.CharField(        max_length=2,         choices=[            ('AR', 'Arabic'),            ('EN', 'English'),        ],        default='AR'    )    def __str__(self):        return self.languageclass Classic(models.Model):    name = models.CharField(max_length=50, blank=False, null=False)    music = models.FileField(upload_to='', max_length=100, blank=True, null=True)    lang = models.ForeignKey(Language, on_delete=models.CASCADE)    def __str__(self):        return self.nameclass Profile(models.Model):    user = models.OneToOneField(User, on_delete=models.CASCADE)    classic = models.ManyToManyField(Classic, blank=True, null=True)    workOut = models.ManyToManyField(WorkOut, blank=True, null=True)    chillOut = models.ManyToManyField(ChillOut, blank=True, null=True)    romantic = models.ManyToManyField(Romantic, blank=True, null=True)    happy = models.ManyToManyField(Happy, blank=True, null=True)    sad = models.ManyToManyField(Sad, blank=True, null=True)    lang = models.ManyToManyField(Language, blank=True, null=True)    def __str__(self):        return str(self.user)def update_user_profile(sender, **kwargs):    if kwargs['created']:        user = Profile.objects.create(user=kwargs['instance'])post_save.connect(update_user_profile,sender=User)Admin.pyfrom django.contrib import admin# Register your models here.from . import models