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Max Williams

2007-Aug-03 14:48 UTC

Problems saving an uploaded image to an app folder

In my app, the user can upload images.  Rather than shoving the image
data in the database, i want to put the filename and content type into
the db, then rename the image with its record''s id number, and then
save
it into a local folder in my app folder.  (hardcoded for now)

All the details are being saved to the db ok, so as far as i know the
"picture_file=" method is fine.  But when i try to write the image
with
write_to_disc i have a problem:   if i get the ''read'' field
from the
uploaded image, store it in a variable, and try to write it with another
method, i get an error saying "no ''write'' method exists
for String":
can anyone see what i''m doing wrong here?  (i''ve just 
enclosed the
model methods as all the controller does is call
''write_to_disc'' on my
picture instance):

#in class Picture

attr_accessor :file_data

def picture_file=(input_data)
    self.filename = input_data.original_filename
    self.content_type = input_data.content_type.chomp
    self.file_data = input_data.read
  end

  def write_to_disc
    #save the picture to newspipe/data/pictures with the name
''#{self.id}.extension''
    new_filename =
"#{self.id}.#{self.content_type.split("/").last}"
    if
self.file_data.write("C:\\code\\InstantRails\\rails_apps\\newspipe\\data\\pictures\\data\\pictures\\#{new_filename}")
      return true
    else
      return false
    end
  end
-- 
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Pratik

2007-Aug-03 15:01 UTC

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Re: Problems saving an uploaded image to an app folder

You need to create StringIO or TempFile object for storing input_data

On 8/3/07, Max Williams
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:>
> In my app, the user can upload images.  Rather than shoving the image
> data in the database, i want to put the filename and content type into
> the db, then rename the image with its record''s id number, and
then save
> it into a local folder in my app folder.  (hardcoded for now)
>
> All the details are being saved to the db ok, so as far as i know the
> "picture_file=" method is fine.  But when i try to write the
image with
> write_to_disc i have a problem:   if i get the ''read''
field from the
> uploaded image, store it in a variable, and try to write it with another
> method, i get an error saying "no ''write'' method
exists for String":
> can anyone see what i''m doing wrong here?  (i''ve just 
enclosed the
> model methods as all the controller does is call
''write_to_disc'' on my
> picture instance):
>
> #in class Picture
>
> attr_accessor :file_data
>
> def picture_file=(input_data)
>     self.filename = input_data.original_filename
>     self.content_type = input_data.content_type.chomp
>     self.file_data = input_data.read
>   end
>
>   def write_to_disc
>     #save the picture to newspipe/data/pictures with the name
> ''#{self.id}.extension''
>     new_filename =
"#{self.id}.#{self.content_type.split("/").last}"
>     if
>
self.file_data.write("C:\\code\\InstantRails\\rails_apps\\newspipe\\data\\pictures\\data\\pictures\\#{new_filename}")
>       return true
>     else
>       return false
>     end
>   end
> --
> Posted via http://www.ruby-forum.com/.
>
> >
>

-- 
Cheers!
- Pratik
http://m.onkey.org

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Max Williams

2007-Aug-03 15:24 UTC

head link

Re: Problems saving an uploaded image to an app folder

Pratik Naik wrote:> You need to create StringIO or TempFile object for storing input_data
> 
Thanks Pratik - i just tried that after reading your post, but probably 
did it wrong - i get a complaint about "uninitialized constant 
Picture::TempFile" (i''ve done require ''tempfile''
in the model by the
way)

The first method is causing the crash now - am i using TempFile wrong?

  def picture_file=(input_data)
    self.filename = input_data.original_filename
    self.content_type = input_data.content_type.chomp
    self.file_data = TempFile.new(input_data)
  end

  def write_to_disc
    #save the picture to newspipe/data/pictures with the name 
''#{self.id}.extension''
    new_filename =
"pic#{self.id}.#{self.content_type.split("/").last}"
 
self.file_data.write("C:/code/InstantRails/rails_apps/newspipe/data/pictures/#{new_filename}")
  end
-- 
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Pratik

2007-Aug-03 15:30 UTC

head link

Re: Problems saving an uploaded image to an app folder

Umm...try

self.file_data = ::TempFile.new(input_data)

On 8/3/07, Max Williams
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:>
> Pratik Naik wrote:
> > You need to create StringIO or TempFile object for storing input_data
> >
>
> Thanks Pratik - i just tried that after reading your post, but probably
> did it wrong - i get a complaint about "uninitialized constant
> Picture::TempFile" (i''ve done require
''tempfile'' in the model by the
> way)
>
> The first method is causing the crash now - am i using TempFile wrong?
>
>   def picture_file=(input_data)
>     self.filename = input_data.original_filename
>     self.content_type = input_data.content_type.chomp
>     self.file_data = TempFile.new(input_data)
>   end
>
>   def write_to_disc
>     #save the picture to newspipe/data/pictures with the name
> ''#{self.id}.extension''
>     new_filename =
"pic#{self.id}.#{self.content_type.split("/").last}"
>  
self.file_data.write("C:/code/InstantRails/rails_apps/newspipe/data/pictures/#{new_filename}")
>   end
> --
> Posted via http://www.ruby-forum.com/.
>
> >
>

-- 
Cheers!
- Pratik
http://m.onkey.org

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Max Williams

2007-Aug-03 15:35 UTC

head link

Re: Problems saving an uploaded image to an app folder

Pratik Naik wrote:> Umm...try
> 
> self.file_data = ::TempFile.new(input_data)
> 
done that - i''m still getting
"uninitialized constant TempFile" back though.

thanks for the help by the way...
-- 
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tyler.a.montgomery-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org

2007-Aug-04 16:53 UTC

head link

Re: Problems saving an uploaded image to an app folder

http://manuals.rubyonrails.com/read/chapter/56

this helped me get files into the file system using:

File.open("#{RAILS_ROOT}/path/to/storage/#{new_filename}.jpg",
"wb")
do |f|
      f.write(@params[''picture_file''].read)
    end

then you can access all the files from within your app instead of
writing to your local disk

and of course you can change the file extension to take any kind of
picture


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Max Williams

2007-Aug-06 08:32 UTC

head link

Re: Problems saving an uploaded image to an app folder

tyler.a.montgomery-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
wrote:> http://manuals.rubyonrails.com/read/chapter/56
> 
> this helped me get files into the file system using:
> 
> File.open("#{RAILS_ROOT}/path/to/storage/#{new_filename}.jpg",
"wb")
> do |f|
>       f.write(@params[''picture_file''].read)
>     end
> 
> then you can access all the files from within your app instead of
> writing to your local disk
> 
> and of course you can change the file extension to take any kind of
> picture
That''s great, thanks tyler!
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