How to set the size of the image in papeclip when displaying the image?

Question

Ruby on Rails

I know that in paperclip you can specify the size of the picture in the model, and then when you upload a picture for this model, the pictures will be cropped.
BUT! How should I do.
Set the image size once for one download.
that is, I upload a picture, set it to 100 by 200, and all subsequent pictures when uploading no longer obey this rule.

Answer 1

You can do this,
but it's just telling the browser to set the width and height attributes of the image.
In general, I doubt that with the help of paperclip you can do this, because. this is not a very good solution in terms of performance. Maybe it would be better to simply specify several sizes for the picture in the model?