Attachment_fu and with_image on existing entries

Hi everyone,

I’m just upgrading an app from acts_as_attachment to attachment_fu and
have
run into an issue using the with_image method on existing attachment
records.

It worked fine in acts_as_attachment but in attachment_fu it simply does
not
work at all, ruby actually hangs. It’s not too surprising really, since
internally a blank string has been passed to Magick::Image.read instead
of
an actual file to load. The with_image method assumes that a temporary
file
is present, which it would be when the uploaded data has just been
assigned,
but not when working with a previously saved record.

A little patch to the plugin can fix it but it doesn’t seem like the
best
solution:

 def with_image(&block)
    # Write out the temporary data if it is not present
    if temp_data.nil?
      self.temp_data = current_data
    end

    self.class.with_image(temp_path, &block)
  end

Anybody else had this problem?

-Jonathan.

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