python pycharm验证最小值和最大值

Question

我想将标题限制在3到25个字符之间。我无法让MinLengthValidator工作。我是Pycharm和python的新手

class Video(models.Model):
    title = models.CharField(max_length=255)
    url = models.URLField()
    youtube_id = models.CharField(max_length=255)

    def clean_title_length(self):
        data = self.cleaned_data['title']
        length= len(data)
        if length < 3 or length > 25:
            raise ValidationError("The length of the title must be 
                 between 3 and 25 characters")
        else:
            return data

views.py

 def add_video(request):
     form = VideoForm()
     if request.method == 'POST':
          filled_form = VideoForm(request.POST)
          if filled_form.is_valid():

以上表格始终返回有效。

有关如何使此范围验证器工作的建议？

TIA

Answer 1

数据是“标题”，因此您的长度始终为5