Fixed NPE on schedule

app/controllers/application_controller.rb

@@ -586,14 +586,16 @@ class ApplicationController < LinguaFrancaApplicationController
     end
 
     @events.each do | event |
-      day = event.start_time.midnight.to_date
-      time = event.start_time.hour.to_f + (event.start_time.min / 60.0)
-      @schedule[day] ||= {}
-      @schedule[day][:times] ||= {}
-      @schedule[day][:times][time] ||= {}
-      @schedule[day][:times][time][:type] = :event
-      @schedule[day][:times][time][:length] = (event.end_time - event.start_time) / 3600.0
-      @schedule[day][:times][time][:item] = event
+      if event.present? && event.start_time.present? && event.end_time.present?
+        day = event.start_time.midnight.to_date
+        time = event.start_time.hour.to_f + (event.start_time.min / 60.0)
+        @schedule[day] ||= {}
+        @schedule[day][:times] ||= {}
+        @schedule[day][:times][time] ||= {}
+        @schedule[day][:times][time][:type] = :event
+        @schedule[day][:times][time][:length] = (event.end_time - event.start_time) / 3600.0
+        @schedule[day][:times][time][:item] = event
+      end
     end
 
     @schedule = @schedule.sort.to_h

app/views/application/500.html.haml

@@ -1,6 +1,6 @@
 = render :partial => 'application/header', :locals => {:image_file => 'parts.jpg'}
 = row do
-	= columns(medium: 12) do
-		%p= _'error.500.description', :p
-		= render 'contact', cancel_btn: false, contact_reason: :website
-		
+  = columns(medium: 12) do
+    %p= _'error.500.description', :p
+    = render 'contact', cancel_btn: false, contact_reason: :website
+    

app/views/application/_contact.html.haml

@@ -1,14 +1,14 @@
 - contact_reason ||= nil
 - locale ||= nil
 = form_tag (locale.present? ? contact_send_url : url_for_locale(locale, contact_send_path)), class: 'contact-form' do
-	= emailfield :email, nil, big: true, required: true unless logged_in?
-	- if contact_reason.present?
-		= hidden_field_tag :reason, contact_reason
-	- else
-		= contact_reason_select
-	= textfield :subject, nil, required: true, big: true
-	= textarea :message, nil, required: true, plain: true
-	.actions
-		= button_tag :send, value: :send
-		- if cancel_btn
-			%button.close.subdued=_'forms.actions.generic.cancel'
+  = emailfield :email, nil, big: true, required: true unless logged_in?
+  - if contact_reason.present?
+    = hidden_field_tag :reason, contact_reason
+  - else
+    = contact_reason_select
+  = textfield :subject, nil, required: true, big: true
+  = textarea :message, nil, required: true, plain: true
+  .actions
+    = button_tag :send, value: :send
+    - if cancel_btn
+      %button.close.subdued=_'forms.actions.generic.cancel'