因此，在crispy表单文档中（此处链接：https：//django-crispy-forms.readthedocs.io/en/latest/crispy_tag_forms.html#change-required-fields），它指出：
星号有一个asteriskField类集。所以你可以使用CSS规则隐藏它。
models.py

class Post(models.Model, HitCountMixin):
    title = models.CharField(max_length=100)
    content = models.TextField()
    date_posted = models.DateField(auto_now_add=True)
    image = models.ImageField(default='default_pics/default_post.jpg', upload_to='post_pics')

    # a teacher can have many blog posts
    author = models.ForeignKey(Teacher, on_delete=models.SET_NULL, null=True)

forms.py

class BlogFrom(forms.ModelForm):
    class Meta:
        model = Post
        fields = ['title', 'content', 'image']
        widgets = {
            'image': forms.FileInput(attrs={"class":"asteriskField"})
        }
        help_texts = {
            'image': 'If you do not set any image, one will be set automatically for you upon creation.'
        }

我不知道该怎么办。请帮帮我！