file.py 文件源码

def render(self, name, value, attrs=None):
        obj = self.obj_for_value(value)
        css_id = attrs.get('id', 'id_image_x')
        related_url = None
        if value:
            try:
                file_obj = File.objects.get(pk=value)
                related_url = file_obj.logical_folder.get_admin_directory_listing_url_path()
            except Exception as e:
                # catch exception and manage it. We can re-raise it for debugging
                # purposes and/or just logging it, provided user configured
                # proper logging configuration
                if filer_settings.FILER_ENABLE_LOGGING:
                    logger.error('Error while rendering file widget: %s', e)
                if filer_settings.FILER_DEBUG:
                    raise
        if not related_url:
            related_url = reverse('admin:filer-directory_listing-last')
        params = self.url_parameters()
        params['_pick'] = 'file'
        if params:
            lookup_url = '?' + urlencode(sorted(params.items()))
        else:
            lookup_url = ''
        if 'class' not in attrs:
            # The JavaScript looks for this hook.
            attrs['class'] = 'vForeignKeyRawIdAdminField'
        # rendering the super for ForeignKeyRawIdWidget on purpose here because
        # we only need the input and none of the other stuff that
        # ForeignKeyRawIdWidget adds
        hidden_input = super(ForeignKeyRawIdWidget, self).render(name, value, attrs)
        context = {
            'hidden_input': hidden_input,
            'lookup_url': '%s%s' % (related_url, lookup_url),
            'object': obj,
            'lookup_name': name,
            'id': css_id,
            'admin_icon_delete': (
                'admin/img/icon_deletelink.gif' if LTE_DJANGO_1_8
                else 'admin/img/icon-deletelink.svg'
            ),
            'LTE_DJANGO_1_7': LTE_DJANGO_1_7,
        }
        html = render_to_string('admin/filer/widgets/admin_file.html', context)
        return mark_safe(html)