Sum values, avoid duplications, and render on a Ruby on rails model

Asked Aug 12 '14 at 07:19

Active Aug 12 '14 at 07:19

Viewed 34 times

I have a Model just like this

Name  **  Money Flow

Bob       +100
Jacky     -130
Bob       -20
Charles   +30
Jacky     +10

And I want to render it in my view as

Name  **  Money Flow

Bob       +80
Jacky     -120
Charles   +30

So I want to avoid duplication of the name, and I want to sum the flows for each name.

Do you have an idea how i can do that ? For now I'm only using a normal loop to display all:

Model.all.each do |model|
    <%= model.name %>
    <%= model.money_flow %>
<%end%>

asked Aug 12 '14 at 07:19

Ananas

what is your requirement...do you want to add all models using an attribute common in them or something else...?? – Milind Aug 12 '14 at 07:34
I think you need to group_by model name and then do sum of model. – urjit on rails Aug 12 '14 at 07:41
@NicoFerna, yes it is almost the same ! Thx ! – Ananas Aug 12 '14 at 08:05

0 Answers0