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Ruby ActiveRecord Basics AR Extensions Model Versioning

Posted by Keith Underwood
Keith Underwood
5,255 Points

undefined method `cost'

So accidentally deleted what i believe was my models folder and went to DL the project files and through all the headache of trying to get things up and running again with the project files i was able to get pretty far until this error.

NoMethodError in Accounts#show undefined method `cost' for #<TimeEntry:0x00000005b24788>

This happens when i click on an account that has a time entry

it narrows it down to line 4 in /app/views/accounts/show.html.erb

which is

Total Cost: $#<%= (@account.account_entries.map &:cost).sum %>

if i remove that line it works fine and i can see that account. I dont even remember adding that line. Looks like :cost isnt defined? how do i fix this and where did that come from? helpppppp! thanks!

Keith Underwood
Keith Underwood
5,255 Points

Found it! In the using callbacks video we changed cost to self.per_hour and added calculate_amount! so you simply change "..entries.map &:cost)" to "..entries.map &:calculate_amount!)"