Rails - Dec 2005 - How might I use file_column for incoming email attachments?

I''m writing a ''Mailman'' model that catches emails
sent to my
application (kind of like backpack, I think).  The trouble is that  
I''d like to save image attachments in the same was that file_column  
saves them--in fact, I''d really like to use a simple assignment like  
photo.image = attachment to save the image in its proper place.

However, I''m getting the following error from the ImageMagick  
extension of file_column:

"Image invalid image"

("image" is the name of the column, so that''s why it seems to
be
duplicated).

Does anyone know how to leverage file_column''s fantastic simplicity  
when dealing with this kind of incoming attachment?

Thanks,

Duane Johnson
(canadaduane)
http://blog.inquirylabs.com/

On 12/31/05, Duane Johnson <duane.johnson@gmail.com>
wrote:
> I''m writing a ''Mailman'' model that catches
emails sent to my
> application (kind of like backpack, I think).  The trouble is that
> I''d like to save image attachments in the same was that
file_column
> saves them--in fact, I''d really like to use a simple assignment
like
> photo.image = attachment to save the image in its proper place.
>
> However, I''m getting the following error from the ImageMagick
> extension of file_column:
>
> "Image invalid image"
>
> ("image" is the name of the column, so that''s why it
seems to be
> duplicated).
>
> Does anyone know how to leverage file_column''s fantastic
simplicity
> when dealing with this kind of incoming attachment?
>
> Thanks,
>
> Duane Johnson
> (canadaduane)
> http://blog.inquirylabs.com/
>
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
In grepping the source, the only place "invalid image" occurs is when
RMagick throws an exception.  I use a modified magick_file_column.rb
that uses the command-line Imagemagick, because I''m not a fan of
RMagick, so I can''t say too much, but try breakpointing the first few
lines of the magick_file_column.rb to see what that exception is
coming from.

--
Kyle Maxwell
Chief Technologist
E Factor Media // FN Interactive
kyle@efactormedia.com
1-866-263-3261

On Jan 2, 2006, at 10:48 AM, Kyle Maxwell wrote:
> On 12/31/05, Duane Johnson <duane.johnson@gmail.com> wrote:
>> I''m writing a ''Mailman'' model that catches
emails sent to my
>> application (kind of like backpack, I think).  The trouble is that
>> I''d like to save image attachments in the same was that
file_column
>> saves them--in fact, I''d really like to use a simple
assignment like
>> photo.image = attachment to save the image in its proper place.
>>
>> However, I''m getting the following error from the ImageMagick
>> extension of file_column:
>>
>> "Image invalid image"
>>
>> ("image" is the name of the column, so that''s why it
seems to be
>> duplicated).
>>
>> Does anyone know how to leverage file_column''s fantastic
simplicity
>> when dealing with this kind of incoming attachment?
>>
>> Thanks,
>>
>> Duane Johnson
>> (canadaduane)
>> http://blog.inquirylabs.com/
>>
>>
>> _______________________________________________
>> Rails mailing list
>> Rails@lists.rubyonrails.org
>> http://lists.rubyonrails.org/mailman/listinfo/rails
>>
>
> In grepping the source, the only place "invalid image" occurs is
when
> RMagick throws an exception.  I use a modified magick_file_column.rb
> that uses the command-line Imagemagick, because I''m not a fan of
> RMagick, so I can''t say too much, but try breakpointing the first
few
> lines of the magick_file_column.rb to see what that exception is
> coming from.

Thanks for looking in to this a bit, Kyle.  I think my question is  
more of an "I don''t quite understand how file_column automatically
handles IOString objects, why won''t it handle a TMail::Attachment  
object?"  I did find the error message that you pointed out, but I  
was a bit surprised at the size of the plugin as a whole.  Quite an  
achievement!  :)

Any idea how I might trick or otherwise modify file_column in to  
accepting TMail::Attachment object assignment (e.g. I''d like to do  
this: User.new(:photo => attachment) where :photo is a file_column  
column and attachment is a TMail::Attachment object)?

Duane Johnson
(canadaduane)
http://blog.inquirylabs.com/

On 1/2/06, Duane Johnson <duane.johnson@gmail.com>
wrote:
>
> On Jan 2, 2006, at 10:48 AM, Kyle Maxwell wrote:
>
> > On 12/31/05, Duane Johnson <duane.johnson@gmail.com> wrote:
> >> I''m writing a ''Mailman'' model that
catches emails sent to my
> >> application (kind of like backpack, I think).  The trouble is that
> >> I''d like to save image attachments in the same was that
file_column
> >> saves them--in fact, I''d really like to use a simple
assignment like
> >> photo.image = attachment to save the image in its proper place.
> >>
> >> However, I''m getting the following error from the
ImageMagick
> >> extension of file_column:
> >>
> >> "Image invalid image"
> >>
> >> ("image" is the name of the column, so that''s
why it seems to be
> >> duplicated).
> >>
> >> Does anyone know how to leverage file_column''s fantastic
simplicity
> >> when dealing with this kind of incoming attachment?
> >>
> >> Thanks,
> >>
> >> Duane Johnson
> >> (canadaduane)
> >> http://blog.inquirylabs.com/
> >>
> >>
> >> _______________________________________________
> >> Rails mailing list
> >> Rails@lists.rubyonrails.org
> >> http://lists.rubyonrails.org/mailman/listinfo/rails
> >>
> >
> > In grepping the source, the only place "invalid image"
occurs is when
> > RMagick throws an exception.  I use a modified magick_file_column.rb
> > that uses the command-line Imagemagick, because I''m not a fan
of
> > RMagick, so I can''t say too much, but try breakpointing the
first few
> > lines of the magick_file_column.rb to see what that exception is
> > coming from.
>
>
> Thanks for looking in to this a bit, Kyle.  I think my question is
> more of an "I don''t quite understand how file_column
automatically
> handles IOString objects, why won''t it handle a TMail::Attachment
> object?"  I did find the error message that you pointed out, but I
> was a bit surprised at the size of the plugin as a whole.  Quite an
> achievement!  :)
>
> Any idea how I might trick or otherwise modify file_column in to
> accepting TMail::Attachment object assignment (e.g. I''d like to do
> this: User.new(:photo => attachment) where :photo is a file_column
> column and attachment is a TMail::Attachment object)?
>
> Duane Johnson
> (canadaduane)
> http://blog.inquirylabs.com/
>
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
File_column relies on receiving a CGI-uploaded file, which is either a
File, or an IOString object, depending on filesize, which has been
extended with a few extra methods (original_filename, size,
local_path, content_type).  If you pass an ordinary File,
FileColumn::FileCompat is mixed in to provide this functionality. 
This happens in BaseUploadedFile.assign().

I don''t know much about TMail::Attachment, but if its similar enough
to File, you could replace the first line in
BaseUploadedFile.assign():

#old
if file.is_a? File

#new
if file.is_a?(File) || file.is_a?(TMail::Attachment)

--
Kyle Maxwell
Chief Technologist
E Factor Media // FN Interactive
kyle@efactormedia.com
1-866-263-3261

On 1/3/06, Kyle Maxwell <kyle@kylemaxwell.com>
wrote:
> On 1/2/06, Duane Johnson <duane.johnson@gmail.com> wrote:
> >
> > On Jan 2, 2006, at 10:48 AM, Kyle Maxwell wrote:
> >
> > > On 12/31/05, Duane Johnson <duane.johnson@gmail.com> wrote:
> > >> I''m writing a ''Mailman'' model that
catches emails sent to my
> > >> application (kind of like backpack, I think).  The trouble is
that
> > >> I''d like to save image attachments in the same was
that file_column
> > >> saves them--in fact, I''d really like to use a simple
assignment like
> > >> photo.image = attachment to save the image in its proper
place.
> > >>
> > >> However, I''m getting the following error from the
ImageMagick
> > >> extension of file_column:
> > >>
> > >> "Image invalid image"
> > >>
> > >> ("image" is the name of the column, so
that''s why it seems to be
> > >> duplicated).
> > >>
> > >> Does anyone know how to leverage file_column''s
fantastic simplicity
> > >> when dealing with this kind of incoming attachment?
> > >>
> > >> Thanks,
> > >>
> > >> Duane Johnson
> > >> (canadaduane)
> > >> http://blog.inquirylabs.com/
> > >>
> > >>
> > >> _______________________________________________
> > >> Rails mailing list
> > >> Rails@lists.rubyonrails.org
> > >> http://lists.rubyonrails.org/mailman/listinfo/rails
> > >>
> > >
> > > In grepping the source, the only place "invalid image"
occurs is when
> > > RMagick throws an exception.  I use a modified
magick_file_column.rb
> > > that uses the command-line Imagemagick, because I''m not
a fan of
> > > RMagick, so I can''t say too much, but try breakpointing
the first few
> > > lines of the magick_file_column.rb to see what that exception is
> > > coming from.
> >
> >
> > Thanks for looking in to this a bit, Kyle.  I think my question is
> > more of an "I don''t quite understand how file_column
automatically
> > handles IOString objects, why won''t it handle a
TMail::Attachment
> > object?"  I did find the error message that you pointed out, but
I
> > was a bit surprised at the size of the plugin as a whole.  Quite an
> > achievement!  :)
> >
> > Any idea how I might trick or otherwise modify file_column in to
> > accepting TMail::Attachment object assignment (e.g. I''d like
to do
> > this: User.new(:photo => attachment) where :photo is a file_column
> > column and attachment is a TMail::Attachment object)?
> >
> > Duane Johnson
> > (canadaduane)
> > http://blog.inquirylabs.com/
> >
> >
> > _______________________________________________
> > Rails mailing list
> > Rails@lists.rubyonrails.org
> > http://lists.rubyonrails.org/mailman/listinfo/rails
> >
>
> File_column relies on receiving a CGI-uploaded file, which is either a
> File, or an IOString object, depending on filesize, which has been
> extended with a few extra methods (original_filename, size,
> local_path, content_type).  If you pass an ordinary File,
> FileColumn::FileCompat is mixed in to provide this functionality.
> This happens in BaseUploadedFile.assign().
>
> I don''t know much about TMail::Attachment, but if its similar
enough
> to File, you could replace the first line in
> BaseUploadedFile.assign():
>
> #old
> if file.is_a? File
>
> #new
> if file.is_a?(File) || file.is_a?(TMail::Attachment)
>
> --
> Kyle Maxwell
> Chief Technologist
> E Factor Media // FN Interactive
> kyle@efactormedia.com
> 1-866-263-3261
>
Note that the solution I just proposed won''t help with the RMagick
issue, just getting a TMail::Attachment into FileColumn

--
Kyle Maxwell
Chief Technologist
E Factor Media // FN Interactive
kyle@efactormedia.com
1-866-263-3261