django 1.2 使用自定义Widget实现在change_view页面中增加额外元素

最终实现效果

直接上代码:
新建模块widgets.py

from django.contrib.admin.widgets import AdminFileWidget
from django.utils.safestring import mark_safe
from django.utils.translation import ugettext as _

class FileWidgetWithExample(AdminFileWidget):
    """
    A FileField Widget that shows its current value if it has one.
    """
    def __init__(self, attrs = {}):
        super(FileWidgetWithExample, self).__init__(attrs)

    def render(self, name, value, attrs = None):
        output = []
        output.append(super(FileWidgetWithExample, self).render(name, value, attrs))
        output.append('<p class="help"><a target="_blank" href="/download/?model=%s&filetype=xml">%s</a></p>' % \
                      (name, _('Example')))
        return mark_safe(u''.join(output))

admin.py

class FileModelAdmin(djopt.ModelAdmin):
    formfield_overrides = {djmdl.FileField: {'widget': mywdg.FileWidgetWithExample}}

djsite.site.register(mym.FileModel, FileModelAdmin)

评论

1 楼 Leonaking 2011-08-31  

请问我不像替换所有的FileField呢？只替换其中的一个该怎么做？