How much view logic should be displayed in views?

rubyonrails-talk
1

Hi,

I have a few cases where a particular value on a page should take 1 of 2 values and so at the top of the template I chose which:

<%   count = @count1 || @count2 %> <%= count %>

Often the decision between the two is a little more complicated e.g., based on their values. The question is where should this sort of code go? In a helper? It is the controller that generates the instance variables @count1 and @count2 so it could very easily do the whole calculation and create another instance variable (both @count1 and @count2 are used elsewhere in the page so are still required). Or should this sort of thing be an attribute on a model?

I am never sure where this sort of logic should go as it is kind of view logic and kind of business logic.

Thanks in advance, Toby

2

You're right, that kind of logic is difficult to place. I have seen one clean solution to this, though: Presenters

Jason