Comments on: validate image dimensions with paperclip

By: aji

aji — Thu, 15 Jul 2010 11:39:18 +0000

many thanks for this

By: Rohan

Rohan — Mon, 12 Jul 2010 20:44:49 +0000

Ohh thanks…googling helped me land on this quickly and did the job for me

By: Jared

Jared — Tue, 30 Mar 2010 00:02:27 +0000

Thanks for posting the tip Jamie!

By: Jamie Flournoy

Jamie Flournoy — Mon, 29 Mar 2010 18:21:16 +0000

Identify hangs when Paperclip invokes it like this:

identify -format “%wx%h” “”[0] 2> /dev/null

note the “” before [0]. Identify sees this:

identify -format %wx%h [0]

and never does anything.

To avoid this make sure you don’t pass a null to from_file. Inside the validate method add this condition around the code above:

def validate
if self.image && self.image.queued_for_write[:original]
# … dimensions = etc etc
end
end

and it will stop hanging.

By: Jared

Jared — Thu, 15 Oct 2009 23:34:22 +0000

@Dave can you post your test code too?

By: Dave Mauldin

Dave Mauldin — Thu, 15 Oct 2009 22:57:10 +0000

The code can be seen at http://gist.github.com/211365

By: Dave Mauldin

Dave Mauldin — Thu, 15 Oct 2009 22:56:30 +0000

So I’m trying to do something similar but running into an issue while running tests. The method you’ve posted causes tests to hang in Paperclip::Geometry. I even tried just doing a basic piece of code that just gets dimensions after a save.

Also causes tests to hang. Can’t find any information anywhere on why this is happening and was hoping if you’d experienced it, you’d worked around it.

By: Adam

Adam — Wed, 30 Sep 2009 16:00:30 +0000

I wish i googled this before i went through the trouble of building it manually. thanks!