Rails 3.2 Sum Integers in View

Question

My view lists a set of expenses, I would like to sum the values in the current view. This is the code I am trying in my controller.

@project = Project.find(params[:project_id])
@expense_list = @project.expenses.find_all_by_user_id(current_user.id).sort_by(&:expense_date)
@expense_total = @expense_list.sum(:amount)

The error I get is:

undefined method `+' for #<Expense:0x007f907a2ba888>

Any advice? I feel like I'm doing something wrong. Thanks!

score 1 · Accepted Answer · answered Mar 06 '14 at 16:58

1

Try this:

@expense_total = @project.expenses.where(:user_id => current_user.id).sum(:amount)

answered Mar 06 '14 at 16:58

Emu

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fantastic, so simple, yet so not how I thought to do it :) – Atari2600 Mar 06 '14 at 17:05
here you can find your answer. I hope. http://stackoverflow.com/questions/9574659/rails-where-vs-find – Emu Mar 06 '14 at 17:13

Rails 3.2 Sum Integers in View

1 Answers1