scrapper_models_controllers.rb

#averages_controller.rb
class AveragesController < ApplicationController
  #Uses the use_case flag to query for the correct type of averages
  def all_salaries
    @data = Average.where(use_case: "overall_salaries")
    respond_to_block
  end

  def professors_only
    @data = Average.where(use_case: "professors_only")
    respond_to_block
  end

  def administrative_staff
    @data = Average.where(use_case: "administrative_only")
    respond_to_block
  end

  private
  def respond_to_block
    respond_to do |format|
      format.json { render json: @data }
    end
  end
end

#average.rb
class Average < ActiveRecord::Base
  # This is a rails magical thing that sets the structure of the JSON object that we are going to render
  def serializable_hash(options = {})
    {
      university: university,
      average_salary: average_salary
    }
  end
end