添加媒体模板上下文处理器也可以完成工作
TEMPLATE_CONTEXT_PROCESSORS = ( "django.core.context_processors.request", "django.contrib.auth.context_processors.auth", "django.core.context_processors.media", "django.core.context_processors.static",)

添加媒体模板上下文处理器也可以完成工作
TEMPLATE_CONTEXT_PROCESSORS = ( "django.core.context_processors.request", "django.contrib.auth.context_processors.auth", "django.core.context_processors.media", "django.core.context_processors.static",)