From: Michael Morin <uzimonkey@...>
Date: 2008-08-26T06:52:23+09:00
Subject: Re: RMagick write fails / to_blob works

Gaspard Bucher wrote:
> Image#write's argument is in fact a String (f.path), not the Tempfile 
> object itself...
> 
>> Gaspard Bucher wrote:
>>> I am trying to use @img.write(path) but it's not working (zero bytes
>>> written). Using "to_blob" works.
>>>
>>>
>>>     f = Tempfile.new('tmp_img')
>>> FAILING CODE:
>>>     @img.write(f.path)
>>>
>>> WORKING CODE:
>>>     File.open(f.path, 'wb') do |f|
>>>       f.syswrite(@img.to_blob)
>>>     end
>>
>> Image#write doesn't know what to do with a Tempfile object. It can only
>> accept a string or a File object that's been opened for output.
>>
>> Image#write calls directly into ImageMagick, and ImageMagick doesn't
>> know anything about Ruby objects like Tempfiles.
>> -- 
>> Posted via http://www.ruby-forum.com/.
>>
> 
> 

It's possibly due to the file already being opened for writing.  Try 
f.close first, then @img.write(f.path).

-- 
Michael Morin
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