Rails - Mar 2011 - Tutorial for native Rails 3 upload to database?

I''ve searched in vain for a basic tutorial on how to upload a binary
file to a database using vanilla Rails 3. Yes, I know about Paperclip;
no, I don''t want to upload the files to a filesystem.

What I''d really like to do is capture the filename, mime-type, and
data inside the create/update action--no separate upload action
required, as the table is dedicated to the file uploads.

So far, I have this:

  = form_for @photo, :html => { :multipart => true } do |f|
    = f.label :data
    %br/
    = f.file_field :data
    .actions
    = f.submit

but get festive error messages like:

  NoMethodError in PhotosController#create
  undefined method `gsub'' for #<ActionDispatch::Http::UploadedFile:
0xa64da84>

when I submit the form. What should my create/update actions look like
in order to store the file and metadata properly inside the database?

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W dniu 2011-03-22 03:22, Todd A. Jacobs pisze:
> I''ve searched in vain for a basic tutorial on how to upload a
binary
> file to a database using vanilla Rails 3. Yes, I know about Paperclip;
> no, I don''t want to upload the files to a filesystem.
>
> What I''d really like to do is capture the filename, mime-type, and
> data inside the create/update action--no separate upload action
> required, as the table is dedicated to the file uploads.
>
> So far, I have this:
>
>    = form_for @photo, :html =>  { :multipart =>  true } do |f|
>      = f.label :data
>      %br/
>      = f.file_field :data
>      .actions
>      = f.submit
>
> but get festive error messages like:
>
>    NoMethodError in PhotosController#create
>    undefined method `gsub'' for
#<ActionDispatch::Http::UploadedFile:
> 0xa64da84>
>
> when I submit the form. What should my create/update actions look like
> in order to store the file and metadata properly inside the database?
>
My basic version is
# view
<%= form_for @photo, :html => {:multipart => true } do |f| %>
<%= f.file_field :upload %>
<%= f.submit "Save" %>
<% end %>

# controller
     ...
     @photo.save
     ...

# model
    attr_accessor :upload


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Hej Tod,

the above example is a good start, but you need to keep in mind, that the 
upload attribute of the photo is actually a File object.
This means you will need to copy it to a permanent location, because in that 
state it most likely is in the /tmp dir.

Take a look at this tutorial: 
http://www.tutorialspoint.com/ruby-on-rails/rails-file-uploading.htm (first 
hit when searching for "rails file upload" on google ;))

Best,
Sebastian

--------------------------
Sebastian Gräßl
sebastian-30c1IgTnpsdP52+qxqhqIQ@public.gmane.org
http://validcode.me 

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