Rails: ImageMagick "`identify -format" command fails in Rails

Question

I'm using Rails with mini_magick and my code fails on call of image.size with such exception:

`identify -format %m %w %h %b /tmp/RackMultipart20231025-217-shzlwd.png[0]` failed with error: > image.size

Recently I updated my ruby version to 3.1 and Rails to 7.0, so it could be somehow connected with it. Also using mini_magick version 4.11.0.

Any hints how to fix this?

I imagine you'd need to double-quote the format specification .... -format "%m %w %h %b" ... — Mark Setchell
– Mark Setchell, Commented Oct 25, 2023 at 13:07
Also, if using v7 ImageMagick, the syntax has changed and you need to use magick identify .... See stackoverflow.com/a/61208844/2836621 — Mark Setchell
– Mark Setchell, Commented Oct 25, 2023 at 13:23
Is your MiniMagick trying to use IM 7 and you only have IM 6 installed (or vice-versa)? — fmw42
– fmw42, Commented Oct 25, 2023 at 14:07
@MarkSetchell identify -format "%m %w %h %b" it's not my code - it's just error message from trace (seems like ImageMagick code). — kwaigon
– kwaigon, Commented Oct 25, 2023 at 14:23
Thank you for help guys, it was connected with ImageMagick version. — kwaigon
– kwaigon, Commented Oct 30, 2023 at 13:01

kwaigon · Accepted Answer · 2023-10-30 13:00:58Z

So, the issue really connected with ImageMagick (IM) version. My IM version was 6.9.10-23.

Upgrade IM to version 6.9.11 can fix this issue (if you are using Heroku, migrate to heroku-22 will automatically update IM version).

PS: Resizing image can be as workaround, if there is no possibility to update IM itself.

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