python - django中的model()

Question

def gen_private_file_share(request, repo_id):
    emails = request.POST.getlist('emails', '')
    s_type = request.POST.get('s_type', '')
    path = request.POST.get('path', '')
    perm = request.POST.get('perm', 'r')
    file_or_dir = os.path.basename(path.rstrip('/'))
    username = request.user.username

    for email in [e.strip() for e in emails if e.strip()]:
        if not is_valid_username(email):
            continue

        if not is_registered_user(email):
            messages.error(request, _('Failed to share to "%s", user not found.') % email)
            continue

        if s_type == 'f':
            pfds = PrivateFileDirShare.objects.add_read_only_priv_file_share(
                username, email, repo_id, path)


    next = request.META.get('HTTP_REFERER', None)
    if not next:
        next = SITE_ROOT
    return HttpResponseRedirect(next)



class PrivateFileDirShare(models.Model):
    from_user = LowerCaseCharField(max_length=255, db_index=True)
    to_user = LowerCaseCharField(max_length=255, db_index=True)
    repo_id = models.CharField(max_length=36, db_index=True)
    path = models.TextField()
    token = models.CharField(max_length=10, unique=True)
    permission = models.CharField(max_length=5)          
    s_type = models.CharField(max_length=5, default='f') 
    objects = PrivateFileDirShareManager()



class PrivateFileDirShareManager(models.Manager):
    def add_private_file_share(self, from_user, to_user, repo_id, path, perm):
        """
        """
        path = normalize_file_path(path)
        token = gen_token(max_length=10)

        pfs = self.model(from_user=from_user, to_user=to_user, repo_id=repo_id,
                         path=path, s_type='f', token=token, permission=perm)
        pfs.save(using=self._db)
        return pfs

    def add_read_only_priv_file_share(self, from_user, to_user, repo_id, path):
        """
        """
        return self.add_private_file_share(from_user, to_user, repo_id,
                                           path, 'r')

我的问题是

 pfs = self.model(from_user=from_user, to_user=to_user, repo_id=repo_id,
                         path=path, s_type='f', token=token, permission=perm) 

这里的self.model()是调用父类的构造函数吗？

Answer 1

No one knows what self.model() is before it is run. Only when it is run does one know what it is.

But judging from your code, only PrivateFileDirShare overrides the default manager (Manager), that is, the object of PrivateFileDirShare will be executed when the add_private_file_share method is called when using the manager

pfs = self.model(from_user=from_user, to_user=to_user, repo_id=repo_id,
                         path=path, s_type='f', token=token, permission=perm)

At this point we also know that self.model represents the instance object of PrivateFileDirShare