名称错误：未定义名称'mark_safe'(Django)

Question

我在"admin.py">中有下面的代码:

# "admin.py"
from django.contrib.admin.widgets import AdminFileWidget
class CustomAdminFileWidget(AdminFileWidget):
def render(self, name, value, attrs=None, renderer=None):
result = []
if hasattr(value, "url"):
result.append(
f'''<a href="{value.url}" target="_blank">
<img 
src="{value.url}" alt="{value}" 
width="100" height="100"
style="object-fit: cover;"
/>
</a>'''
)
result.append(super().render(name, value, attrs, renderer))
return mark_safe("".join(result))

然后，我得到了下面的错误:

NameError: name 'mark_safe' is not defined

我要导入"mark_safe">但是我不知道在哪里可以找到"mark_safe">来自:

from <I_do_not_know> import mark_safe

哪里可以找到"mark_safe">来自哪里?

Answer 1

从django.utils.safestring导入mark_safe:

from django.utils.safestring import mark_safe