Objects Being Attached to their Creator Question - ruby-on-rails

Question

I am working on a rails application where one user class named (submitters) are able to login and once they are logged in they create videos. My videos controller is here:
class VideosController < ApplicationController
def index
#videos = Video.find :all
end
def new
#submitter = current_submitter
#video = #submitter.videos.build
end
def create
#submitter = current_submitter
#video = #submitter.videos.build(params[:video])
if #video.save
#video.convert
flash[:notice] = 'Video has been uploaded'
redirect_to :action => 'index'
else
render :action => 'new'
end
end
def show
#video = Video.find(params[:id])
end
def destroy
#video = Video.find(params[:id])
#video.destroy
flash[:notice] = "Successfully deleted the video."
redirect_to root_url
end
def update_date
#video = Video.find(params[:id])
#video.update_attributes(params[:video])
flash[:notice] = "Successfully added a launch date!"
redirect_to #video
end
end
As you can probably see, I am trying to construct the controller so that when a video is created, it is created as belonging to the submitter who upload the video (via the video new view). I am using a auth system with a current_submitter method written in the application controller.
Now it lets me upload a video fine when I am logged in as a submitter. The trouble for me is working out how to display information in my view. If I want to display some columns with information about the video and then others with information about the submitter who uploaded the video, how do I go about doing that from the controller (index action), into the index view. My current view which does not work in below:
<% title "Films Submitted" %>
<table>
<tr>
<th>Title</th>
<th>Film Type</th>
<th>Premiere</th>
<th>Company</th>
<th>Name</th>
</tr>
<% for video in #videos do %>
<tr>
<td><%= link_to video.title, video %></td>
<td><%= video.film_type %></td>
<% if video.premiere == "true" %>
<td>Premiere</td>
<% else %>
<td><%= %></td>
<% end %>
<td><%= video.submitter.company %></td>
<td><%= video.submitter.name %></td>
<td><%= link_to "Delete", video, :confirm => 'Are you sure?', :method => :delete %></td>
</tr>
<% end %>
</table>
<br><br>
<%= link_to "Upload a Video", new_video_path %>
Any suggestions or tips from rails developers would be much appreciative... I am new and trying to learn.
Video Model:
class Video < ActiveRecord::Base
belongs_to :submitter
has_attachment :content_type => :video,
:storage => :file_system,
:max_size => 50.megabytes
end
Submitter Model:
class Submitter < ActiveRecord::Base
acts_as_authentic
has_many :videos
end
Schema:
create_table "videos", :force => true do |t|
t.string "title"
t.text "description"
t.string "state"
t.datetime "created_at"
t.datetime "updated_at"
t.string "content_type"
t.integer "size"
t.string "filename"
t.string "film_type"
t.boolean "premiere", :default => false
t.date "preferred_date"
t.text "reason"
t.integer "submitter_id"
t.date "actual_date"
end
create_table "submitters", :force => true do |t|
t.string "name"
t.string "company"
t.string "email"
t.string "username"
t.string "crypted_password"
t.string "password_salt"
t.string "persistence_token"
t.datetime "created_at"
t.datetime "updated_at"
t.integer "video_id"
end

Answer 1

I think you've probably only setup your associations in one direction. You already have:
class Submitter < ActiveRecord::Base
has_many :videos
end
But you also need to reciprocate that relationship in the video model:
class Video < ActiveRecord::Base
belongs_to :submitter
end
This will create the submitter method in your video model, that references the submitter it belongs to.
UPDATE:
After you updated your question with the model info, I noticed one small thing: You have a video_id column on your submitters table that doesn't need to be there. Only the "belongs_to" side of the association needs a foreign key. But this isn't causing your problem.
I think you might have a video in your database without a submitter! In the index action, since you're not checking for a valid submitter before you start using it, if even a single video record is missing a submitter_id, it'll break the view.