python - Django:删除/删除 slug

Question

我正在处理的问题是表单错误“输入由字母、数字、下划线或连字符组成的有效‘slug’。”

以下是我的表单字段验证:

def clean_slug(self):
        slug = self.cleaned_data['slug']
        if slug.endswith('/'):
            self.cleaned_data['slug'] = slug[:-1]
        slug_check = self.organizer.events.filter(slug=slug).exclude(pk=self.event.pk).exists()
        if slug_check:
            raise forms.ValidationError(_("Slug already exists"), code='duplicated_slug')
        return slug

不知何故，当调用 is_valid() 时，Django 没有考虑我的 self.cleaned_data['slug'] = slug[:-1]。你知道为什么吗？

Answer 1

您正在修改cleaned_data['slug']，这不会产生任何效果。 Django 将使用您从此方法返回的内容，并且您将返回原始(未修改的)slug。来自 documentation :

The return value of this method replaces the existing value in cleaned_data, so it must be the field’s value from cleaned_data (even if this method didn’t change it) or a new cleaned value.

将其更改为:

def clean_slug(self):
    slug = self.cleaned_data['slug']
    if slug.endswith('/'):
        slug = slug[:-1]  # <-- Modify slug, not cleaned_data['slug']
    slug_check = self.organizer.events.filter(slug=slug).exclude(pk=self.event.pk).exists()
    if slug_check:
        raise forms.ValidationError(_("Slug already exists"), code='duplicated_slug')
    return slug  # <-- return modified value