Accessing only some pieces of data from a rails model - ruby-on-rails

Question

I have a userinfor model which has name, userinfo_id, user_id. I have a user model with user_id. I have a video model with video_id,name, userinfo_id and user_id. So If a user uploads a video, and his user_id is 5, and userinfo_id is 10, the video model info will be as follows: Video_id: some number, name: nameofvid, userinfo_id: 10, and user_id: 5. Now that the relationship is explained, I am displaying all the userinfo data and video on the index page. I have a small search bar in my index page too, so my controller index function looks like this:
My userinfos controller index function:
def index
#userinfors = Userinfo.where(["name LIKE ?","%#{params[:search]}%"])
#myvideo = Video.where(:user_id => #userinfors.user_id)
end
When I run this, I get the following error:
The line 6 they are referencing is the "#myvideo = ...." line in the index function.
My index view:
<%= form_tag userinfos_path, :method => 'get' do %>
<%= text_field_tag :search, params[:search] %>
<%= submit_tag "search" %>
<% end %>
<div>
<% #myvideo.each do |myvideo| %>
<div>
<%= video_tag myvideo.introvideo_url.to_s, :size => "240x160", :controls =>true %>
</div>
<div>
<% #userinfors.each do |userinfor| %>
<div>
<% if userinfor.user_id == myvideo.user_id %>
<p><span>Name: </span> <%= userinfor.name %> </p>
<p><span>College: </span> <%= userinfor.college %> </p>
<p><span>GPA: </span> <%= userinfor.gpa %> </p>
<p><span>Major: </span> <%= userinfor.major %> </p>
<%= link_to "profile", userinfo_path(myvideo.userinfo_id) %>
<% end %>
</div>
<% end %>
</div>
<% end %>
</div>
#userinfors gets all the records where the name of the record matches the name entered in the search bar. This part works. So let's assume there are 100 records. 10 of those are named THOMAS. Then when THOMAS is entered in the search bar, #userinfors will have 10 records in it, right? Because only 10 are named thomas. That means those 10 records have different individual user_id's. Then what I want to happen is, the program will go through the 100 video records, and if the user_id in that video record matches the user_id in one of the 10 #userinfors records, that video will be added to the #myvideo variable. So at the end, #myvideo will have 10 records. The user_id's of the ten records in #userinfors will be equal to the user_id's of the ten records in #myvideo. This is what I want to happen.
User model:
class User < ActiveRecord::Base
has_many :userinfos
has_many :videos
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :trackable, :validatable
end
Userinfo model:
class Userinfo < ActiveRecord::Base
belongs_to :user
has_many :videos, through: :user
def info_complete?
name? && email? && college? && gpa? && major?
end
end
Video model:
class Video < ActiveRecord::Base
belongs_to :user
mount_uploader :introvideo, VideoUploader
end

Answer 1

You're accessing to an ActiveRecordRelationship to get the user_id attribute, to do it you need to access to an specific object within that relationship.
You're using the result of a where statement that's an ActiveRecordRelationship to create another query passing that object. You should iterate over every element inside that relationship, but isn't an action to be performed within a controller.
You could create a helper, in app/helpers/userinfos_helper.rb which receives the user_id and returns all the video that have that user_id as value, maybe:
# app/helpers/userinfos_helper.rb
def video_by_user_id(user_id)
Video.where('user_id = ?', user_id)
end
Then in your view, you can get the user_id when you iterate over the #userinfors and pass it to your helper:
# app/views/userinfos/index.html.erb
<% #userinfors.each do |user| %>
<% video_by_user_id(user.user_id).each do |video| %>
<%= video.path %>
<% end %>
<% end %>