Django Book 翻译
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原文:
Like ``FileField`` , but validates that the uploaded object is a valid image. It has two extra optional arguments, ``height_field`` and ``width_field`` , which, if set, will be autopopulated with the height and width of the image each time a model instance is saved.
翻译:
像 ``FileField`` 一样，只不过要验证上传的对象是一个有效的图片。它有两个额外的可选参数： ``height_field`` 和 ``width_field`` ，如果设置了的话，每当模型实例被保存的时候，这两个值就会被设置成图片的高度和宽度。
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