Tutorial for native Rails 3 upload to database?

[luislavena]

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?

[Todd_ASJacobs]

W dniu 2011-03-22 03:22, Todd A. Jacobs pisze:

= form_for @photo, :html => { :multipart => true } do |f|
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

[Todd_ASJacobs]

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