Fixed crashing with numbers

schedules/app/models/course.rb

@@ -74,10 +74,10 @@ class Course < ApplicationRecord
         query.remove!(s)
       end
     end
-
+ 
     query.scan(/(?<= |^)(\d{3})(?=$| )/).each do |a|
       s = a[0]
-      next unless filters.include?("subject") || from_course_number(from_subject(select("*"), filters["subject"]), s).count.positive?
+      next unless filters.include?("subject") && from_course_number(from_subject(select("*"), filters["subject"]), s).count.positive?
       filters["course_number"] = s
       query.remove!(s)
       return filters

schedules/config/routes.rb

@@ -4,7 +4,7 @@ Rails.application.routes.draw do
   get 'search/update', to: 'search#update'
 
   scope :api do # Register /api routes
-    resources :courses, only: [:index, :show, :listing]
+    resources :courses, only: [:index, :show]
     resources :course_sections, only: [:index]
     resources :course_listings, only: [:index]
     resources :schedules, only: [:index]

schedules/test/controllers/course_listings_controller_test.rb

@@ -4,12 +4,12 @@ class CourseListingsControllerTest < ActionDispatch::IntegrationTest
   test 'should grab sections for course' do
     get course_listings_url course_id: courses(:cs112).id
     assert_response :success
-    
+
     listing_returned = JSON.parse @response.body
     assert listing_returned.size.positive?
-    
+
     assert listing_returned[0].include?("sections")
-    
-    assert_equal(listing_returned[0]["sections"].length(), 2)
+
+    assert_equal(listing_returned[0]["sections"].length, 2)
   end
 end