clean_title () отсутствует 1 обязательный позиционный аргумент: 'title'

Question

clean_title () отсутствует 1 обязательный позиционный аргумент: 'title'

Я вижу эту проблему и не знаю, как ее решить. Можете ли вы помочь мне?

Здесь некоторые части моего models.py

class Post(models.Model):
    kategori= models.ManyToManyField(Category,related_name='post',verbose_name='Kategoriler',help_text='Başlık giriniz')
    title= models.CharField(max_length=120,blank=False,verbose_name='Başlık',help_text='Baslik giriniz')
    slug = models.SlugField(max_length=122,default='', null=False, verbose_name='Slug Alani',editable=True)
    icerik= models.TextField(verbose_name='icerik',help_text='İcerik giriniz')

    def __str__(self):
        return '%s' % (self.title)

    def get_slug(self):
        return self.slug



    def unique_slug(self,new_slug, orijinal_slug, index,):
        if Post.objects.filter(slug=new_slug):
            new_slug='%s-%s' %(orijinal_slug,index)
            index+=1
            return self.unique_slug(new_slug=new_slug, orijinal_slug=orijinal_slug, index=index)

        return new_slug


    def save(self, *args, **kwargs):
        if self.slug =='':
            index = 1
            new_slug = slugify(self.title)
            self.slug = self.unique_slug(new_slug=new_slug , orijinal_slug= new_slug , index=index)
        #self.slug=slugify(self.title)
        super(Post, self).save(*args,**kwargs)

здесь посмотреть страницу

def post_create(request):
    post_form= PostForm()

    if request.method=='POST':
        post_form= PostForm(request.POST,request.FILES)
        if post_form.is_valid():
            created_post =post_form.save(commit=True)
            messages.success(request,'Post Oluşturuldu')
            return HttpResponseRedirect(reverse('posts:post_detail',kwargs={'slug':created_post.get_slug(self='title')}))

    return render(request,'posts/post_create.html',context={'form':post_form})

TypeError at /posts/create/
clean_title() missing 1 required positional argument: 'title'
Request Method: POST
Request URL:    http://127.0.0.1:8000/posts/create/
Django Version: 2.2.6
Exception Type: TypeError
Exception Value:    
clean_title() missing 1 required positional argument: 'title'
Exception Location: C:\Users\EMREKA~1\Desktop\myblog\myenv\lib\site-packages\django\forms\forms.py in _clean_fields, line 402
Python Executable:  C:\Users\EMREKA~1\Desktop\myblog\myenv\Scripts\python.exe
Python Version: 3.7.5
Python Path:    
['C:\\Users\\EMRE KARACA\\Desktop\\myblog',
 'C:\\Users\\EMREKA~1\\Desktop\\myblog\\myenv\\Scripts\\python37.zip',
 'C:\\Users\\EMREKA~1\\Desktop\\myblog\\myenv\\DLLs',
 'C:\\Users\\EMREKA~1\\Desktop\\myblog\\myenv\\lib',
 'C:\\Users\\EMREKA~1\\Desktop\\myblog\\myenv\\Scripts',
 'c:\\users\\emre karaca\\appdata\\local\\programs\\python\\python37\\Lib',
 'c:\\users\\emre karaca\\appdata\\local\\programs\\python\\python37\\DLLs',
 'C:\\Users\\EMREKA~1\\Desktop\\myblog\\myenv',
 'C:\\Users\\EMREKA~1\\Desktop\\myblog\\myenv\\lib\\site-packages']