fixed crash with online courses

CHANGELOG.md

 v2.1.0
 	- Added "Save as PNG" feature for the calendar view
 	- Fixed bugs related to exporting/sharing a view-only schedule
+v2.1.1
+	- Fixed crash related to adding online courses

schedules/Dockerfile

@@ -10,6 +10,6 @@ ENV RAILS_ENV production
 
 RUN bundle install
 RUN export SECRET_KEY_BASE=$(rails secret)
-RUN rake assets:precompile
+RUN rails assets:precompile
 RUN rails db:migrate
 RUN rails db:seed

schedules/Dockerfile.dev

-FROM ruby:2.5
-
-# Copy the project files to /api
-COPY . /api
-
-# Tell Docker to run all commands in /api
-WORKDIR /api
-
-# Install project dependencies
-RUN bundle install
-
-# Perform database migrations
-RUN rails db:migrate
-
-# Load the database from Patriot Web
-RUN rails db:seed

schedules/app/controllers/schedules_controller.rb

@@ -5,19 +5,26 @@ class SchedulesController < ApplicationController
   def show
     valid_crns = @cart.reject { |crn|
       s = CourseSection.find_by_crn(crn)
-      s.nil? || s.start_time == "TBA" || s.end_time == "TBA"
+      s.nil?
     }
 
     @all = valid_crns.map { |crn|
       CourseSection.latest_by_crn(crn)
     }
-    @events = generate_fullcalender_events(@all)
+    @without_online = @all.reject { |s|
+      s.start_time == "TBA" || s.end_time == "TBA"
+    }
+    @events = generate_fullcalender_events(@without_online)
   end
 
   def view
     @all = params[:crns].split(',').map { |crn|
       CourseSection.latest_by_crn(crn)
     }
-    @events = generate_fullcalender_events(@all)
+    @all.reject! { |s| s.nil? }
+    @without_online = @all.reject { |s|
+      s.start_time == "TBA" || s.end_time == "TBA"
+    }
+    @events = generate_fullcalender_events(@without_online)
   end
 end