Fix comment - use method @job.city.try(:name)

app/views/apply_mailer/apply_mail.html.erb

@@ -7,8 +7,8 @@
     <p> Dear <%= @fullname %></p>
     <p> Thank you for applied with VenJOB. Your applied job's information is as follow: </p>
     <p> Job title: <%= @job.name %> </p>
-    <p> Location: <%= @job.city.name unless @job.city.nil? %> </p>
-    <p> Company: <%= @job.company.name unless @job.company.nil? %> </p>
+    <p> Location: <%= @job.city.try(:name) %> </p>
+    <p> Company: <%= @job.company.try(:name) %> </p>
 
     <p> Your submitted information: </p>
     <p> Full Name: <%= @fullname %> </p>

app/views/apply_mailer/apply_mail.text.erb

 Dear <%= @fullname %>
 Thank you for applied with VenJOB. Your applied job's information is as follow:
 Job title: <%= @job.name %>
-Location: <%= @job.city.name unless @job.city.nil? %>
-Company: <%= @job.company.name unless @job.company.nil? %>
+Location: <%= @job.city.try(:name) %>
+Company: <%= @job.company.try(:name) %>
 
 Your submitted information:
 Full Name: <%= @fullname %>