Question

当使用django readonly_fields类的新ModelAdmin属性时，我发现如果我将FileField中定义为readonly_fields的字段的名称放在{{1}}中，它没有显示工作链接，它只显示相对路径。我想要一个可下载的链接。

Answer 1

虽然Django Admin问题仍未解决，但

我使用这个小部件作为穷人解决上述问题的方法：

#your_app/models.py
class ModelWithFileField(models.Model):
    ...
    file = models.FileField(upload_to='dir/')

#your_app/admin.py

import os

from django import forms
from django.utils.encoding import force_unicode
from django.utils.safestring import mark_safe
from django.utils.html import escape

class ReadonlyFileInput(forms.Widget):
    def __init__(self, obj, attrs=None):
        self.object = obj
        super(ReadonlyFileInput, self).__init__(attrs)
    def render(self, name, value, attrs=None):
        if value and hasattr(value, "url"):
            return mark_safe(u'<p><a href="%s">%s</a></p>'\
            % (escape(value.url),\
            escape(force_unicode(os.path.basename(value.path)))))
        else:
            return ''

class ModelWithFileFieldForm(forms.ModelForm):
    class Meta:
        model = ModelWithFileField       

    def __init__(self, *args, **kwargs):
        super(ModelWithFileFieldForm, self).__init__(*args, **kwargs)
        self.fields['file'].widget = ReadonlyFileInput(self.instance)

   # If you are paranoid enough, you can override the clean() method as well, 
   # to be sure that no one has been messing with your beloved file by
   # maliciously manipulating the POST data. If you don't expect compete
   # strangers to be using your admin site, this is not an issue.

class ModelWithFileFieldAdmin(admin.ModelAdmin)
    form = ModelWithFileFieldForm
    ...
    def get_readonly_fields(self, request, obj=None):
        return [...] #The 'file' field should not be present in this list

使用django admin的readonly_fields和FileField

1 个答案: