使用Amazon S3的回形针调整图像大小

Question

I am using paperclip gem for uploading images to s3 amazone. Three copy of images are uploading - one is real and two are of different resolution like 10x10,50x50.

Now I want to upload 5 copy of images like 10x10, 20x20 ,...... This can be done by specifying size in model.

But what about the existing images on s3. How to create copy of existing images on s3 ?

Answer 1

You can specify the style in the model

styles => { :first=> "10x10", :second=> "20x20", :third=> "30x30", ....},

and after you made your new styles just use the rake task paperclip provides

rake paperclip:refresh CLASS=User

where User is the model in this case

This will go on every user and regenerate the images

see more here https://github.com/thoughtbot/paperclip/wiki/Thumbnail-Generation