Paperclip gem with Rails 4 doesn't save non-file fields - ruby-on-rails

Question

I'm building a Rails 4 app with the paperclip gem in which users can upload a video file from a form with several other fields (uploader_first_name, uploader_last_name, uploader_email).
The paperclip installation went smoothly (although I needed to add gem 'protected_attributes'
) and I'm able to save file to the correct and create the corresponding records in the videos table, however all the non-paperclip fields are null and I'm not sure why.
class Video < ActiveRecord::Base
belongs_to :project
attr_accessible :file
has_attached_file :file, :url=>"/tmp/video_uploads", :path=>":rails_root/tmp/video_uploads"
end
class VideosController < ApplicationController
def save
#video = Video.create(params[:video])
if #video.save
redirect_to root_path
else
redirect_to "somewhere_else"
end
end
#I tried with this too...
#private
#def video_params
#params.require(:video).permit( :uploader_first_name, :uploader_last_name, :uploader_email)
#end
end
In the view...
<h2>Upload your video</h2>
<% myclass = {:class=>'form-control'} %>
<%= form_for(:video, :url => {:action=>'save', :controller=>'videos'}, :html=>{:class=>'upload-form-js', :multipart=> true} ) do |f| %>
<div class="form-group">
<%= f.label(:uploader_first_name, "First Name") %>
<%= f.text_field(:uploader_first_name, myclass) %>
</div>
<div class="form-group">
<%= f.label(:uploader_last_name, "Last Name") %>
<%= f.text_field(:uploader_last_name, myclass) %>
</div>
<div class="form-group">
<%= f.label(:uploader_email, "Email") %>
<%= f.text_field(:uploader_email, myclass) %>
</div>
<div class="form-group">
<label>Video File</label>
<input type="file" name="video[file]" id="video_file"/></span>
</div>
<%= f.submit('Upload', {class: 'btn btn-primary btn-block'}) %>
<% end %>
Update 1
I changed to this...
class VideosController < ApplicationController
def save
#video = Video.create( video_params )
if #video.save
redirect_to root_path
else
redirect_to "somewhere_else"
end
end
private
def video_params
params.require(:video).permit(:file, :uploader_first_name, :uploader_last_name, :uploader_email)
end
end
...and now I get this error:
Errno::EISDIR in VideosController#save
Is a directory - /Applications/MAMP/htdocs/clippo2/tmp/video_uploads
Don't I want the url/path to point to a directory?
Update 2
I changed the video model to...
has_attached_file :file, :url=>"/tmp/video_uploads/:basename.:extension", :path=>":rails_root/tmp/video_uploads/:basename.:extension"
...and now no errors, files get saved to the right directory and the corresponding fields added to the new row, but all other fields are still NULL (original problem).
Update 3
I turned on the debugger and here's what I see after I try to upload a file. It looks like a strong parameters error but I'm not sure how to fix it:
Started POST "/videos/save" for 127.0.0.1 at 2013-08-27 09:21:34 -0400
Processing by VideosController#save as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"es4wPqFr9xPBUFsbHQR/gAzofDC+ZwYsiiJ7RAQZUHk=", "video"=>{"uploader_first_name"=>"adsfasdf", "uploader_last_name"=>"asdfasdf", "uploader_email"=>"asdfasdf", "file"=>#<ActionDispatch::Http::UploadedFile:0x007fc4782e31e8 #tempfile=#<Tempfile:/var/folders/f2/jhv7xx0j3hlckhcg_jbv6hr00000gn/T/RackMultipart20130827-89636-188f0hs>, #original_filename="sample_iPod.m4v", #content_type="video/mp4", #headers="Content-Disposition: form-data; name=\"video[file]\"; filename=\"sample_iPod.m4v\"\r\nContent-Type: video/mp4\r\n">, "project_hashed_id"=>"1377539908"}, "commit"=>"Upload"}
{"utf8"=>"✓", "authenticity_token"=>"es4wPqFr9xPBUFsbHQR/gAzofDC+ZwYsiiJ7RAQZUHk=", "video"=>{"uploader_first_name"=>"adsfasdf", "uploader_last_name"=>"asdfasdf", "uploader_email"=>"asdfasdf", "file"=>#<ActionDispatch::Http::UploadedFile:0x007fc4782e31e8 #tempfile=#<Tempfile:/var/folders/f2/jhv7xx0j3hlckhcg_jbv6hr00000gn/T/RackMultipart20130827-89636-188f0hs>, #original_filename="sample_iPod.m4v", #content_type="video/mp4", #headers="Content-Disposition: form-data; name=\"video[file]\"; filename=\"sample_iPod.m4v\"\r\nContent-Type: video/mp4\r\n">, "project_hashed_id"=>"1377539908"}, "commit"=>"Upload", "controller"=>"videos", "action"=>"save"}
Unpermitted parameters: project_hashed_id
WARNING: Can't mass-assign protected attributes for Video: uploader_first_name, uploader_last_name, uploader_email
app/controllers/videos_controller.rb:6:in `save'
[1m[35m (0.2ms)[0m BEGIN
[1m[36mSQL (0.3ms)[0m [1mINSERT INTO `videos` (`created_at`, `file_content_type`, `file_file_name`, `file_file_size`, `file_updated_at`, `updated_at`) VALUES ('2013-08-27 13:21:34', 'video/mp4', 'sample_iPod.m4v', 2236480, '2013-08-27 13:21:34', '2013-08-27 13:21:34')[0m
[1m[35m (9.0ms)[0m COMMIT
Redirected to http://localhost:3000/
Completed 302 Found in 21ms (ActiveRecord: 9.5ms)

Answer 1

Welcome to the rails 4. 'attr_accessible' was replaced by the strong parameters.
http://api.rubyonrails.org/classes/ActionController/StrongParameters.html
Upd. Can you try this?
def create
#video = Video.create(video_params)
end
private
def video_params
params.require(:video).permit(:file, :uploader_first_name, :uploader_last_name, :uploader_email)
end

Answer 2

I figured out what's going on. The strong parameters were getting in the way because I'm using attr_accessible in the model. Instead of fiddling with the require() and permit() I removed them entirely and added the missing fields to the attr_accessible and now it works:
class Video < ActiveRecord::Base
belongs_to :project
attr_accessible :file, :uploader_first_name, :uploader_last_name, :project_hashed_id, :uploader_email, :rating
has_attached_file :file, :url=>"/tmp/video_uploads/:basename.:extension", :path=>":rails_root/tmp/video_uploads/:basename.:extension"
end
class VideosController < ApplicationController
def save
logger.debug( params )
##video = Video.new( video_params )
#video = Video.new( params[:video])
if #video.save
redirect_to root_path
else
redirect_to "somewhere_else"
end
end
end
I realize that attr_accessible was replaced by strong parameters in Rails 4 but I couldn't get paperclip to work without it. If anyone can tell me how, I'd love to know.
Update
I removed attr_accessible entirely and just used the strong parameters...
class VideosController < ApplicationController
def save
logger.debug( params )
#video = Video.new( video_params )
if #video.save
redirect_to root_path
else
redirect_to "somewhere_else"
end
end
private
def video_params
#params.require(:video).permit(:file, :uploader_first_name, :uploader_last_name, :uploader_email, :project_hashed_id)
params.require(:video).permit!
end
end
...and it works BUT you have to remember to remove the protected_attributes gem and restart rails s for it to take effect (this n00b mistake cost me 45 minutes!)
Moral of this story: Don't mix and match attr_accessible with strong params. Do one or the other and paperclip will work with strong parameters.