Do it like => validates :photos, attached: true, content_type: ['image/png', 'image/jpg', 'image/jpeg'], size: { less_than: 500.kilobytes }, limit: { min: 1, max: 3 }, aspect_ratio: :landscape, dimens...
翻译 - 像=>一样执行:validate:photos,附加:true,content_type:['image / png','image / jpg','image / jpeg'],大小:{小于:500.kilobytes},限制:{min: 1,最大:3},Aspect_ratio::landscape,尺寸:{width:{in:800..1600}
#安全#Modern encryption for Ruby and Rails
翻译 - Rails的现代加密