ruby.rb

# Line 4 of this class:

class CoursesController < ApplicationController
  def index
    @search_term = 'jhu'
    @courses = Coursera.for(@search_term)
  end
end

# Causes: undefined method `for' for Coursera:Module
# However it's defined in app/models/coursera.rb shown below:

class Coursera
  include HTTParty

  base_uri 'https://api.coursera.org/api/catalog.v1/courses'
  default_params fields: "smallIcon,shortDescription", q: "search"
  format :json

  def self.for term
    get("", query: { query: term })["elements"]
  end
end