```ruby
module Coursewareable::Api::V1
  # [Coursewareable::Classroom] API controller
  class ClassroomsController < ApplicationController

    def index
      classrooms = current_resource_owner.classrooms
      render :json => classrooms
    end

    def show
      classroom = Coursewareable::Classroom.find(params[:id])
      render :json => classroom
    end

    # Render the collaborators of a specified classroom
    # This method is the same as #show, but this render just collaborations
    def collaborators
      # @collaborators includes owner and collaborations
      classroom = Coursewareable::Classroom.find(params[:classroom_id])
      classroom[:include_collaborations] = true
      render :json => classroom
    end

    # Render the timeline of classroom
    def timeline
      classroom = Coursewareable::Classroom.find(params[:classroom_id])

      # Paginate the timeline
      timeline = classroom.all_activities.limit(params[:limit]).offset(params[:offset])

      render :json => timeline
    end
  end
end
```

Send requests to resource owner instead of querying everyhing globally.
user
```ruby
module Coursewareable::Api::V1
  # [Coursewareable::Classroom] API controller
  class ClassroomsController < ApplicationController

    # Lists available classrooms
    def index
      classrooms = current_resource_owner.classrooms
      render :json => classrooms
    end

    # Lists classroom details
    def show
      classroom = current_resource_owner.classrooms.find(params[:id])
      render :json => classroom
    end

    # Render the classrooms collaborators
    def collaborators
      classroom = current_resource_owner.classrooms.find(params[:classroom_id])
      render :json => classroom.collaborators, :root => :collaborators
    end

    # Render the timeline of classroom
    def timeline
      classroom = current_resource_owner.classrooms.find(params[:classroom_id])
      timeline = classroom.all_activities.limit(
        params[:limit]).offset(params[:offset])

      render :json => timeline, :root => :activities
    end
  end
end
```
assistant