-When I wrote calculations such as the total value and average value of columns in the view, it became confusing and difficult to read. -To solve the problem whether to write in view or controller
First, add it to the gemfile.
$ bundle install
Next, create a decorator file. This time it's about a model called score. Please use any name you like for the score part.
$ rails g decorator score
Then it will generate a file like this.
This time it was a golf score, so let me calculate the total of 18H.
module ScoreDecorator def total_score format('%+d', hole1_score.to_i + hole2_score.to_i + hole3_score.to_i + ・ ・ ・ hole18_score.to_i) end end
Now the view is clean!
<% @scores.each do |score| %> <%= score.total_score %> <% end %>