Passing data to a view: How prevent the instance variables ?

rubyonrails-talk
1

Greetings, i want pass data to my view without using instace variables. Usually I make renders to partials for pass local variables and preventing use instace variables :

Example:

render( :partial => "filename", :locals => {:paramName = @anyVar} )

I've this method in my controller(controller.rb):

def anyMethod

var1=5 var2=6

end

There's any way to pass var1 and var2 to the default view anyMethod.rhtml without use instace variables?

Thanks for any answer, Juan Pablo

2

I have to ask... why are you so keen on avoiding instance variables? Sorry, I am just curious because they are so widely the standard way of passing data between controller and view. I actually don't know of any other way but that might be simply that I never had a need.

3

Nathan Esquenazi wrote:

I have to ask... why are you so keen on avoiding instance variables? Sorry, I am just curious because they are so widely the standard way of passing data between controller and view. I actually don't know of any other way but that might be simply that I never had a need.

I just want work in a very modular way (OO mode). And I don't need than all my variables have to be with public access, that's the reason

4

I just want work in a very modular way (OO mode). And I don't need than all my variables have to be with public access, that's the reason

There is nothing wrong with passing instance variables to the view. However, I do think its good practice to limit the number of variables you use. If your passing a large number of variables they can probably be wrapped into an object, then you can just pass the object. For example:

def some_controller_method   @height = 5   @width = 10   @depth = 2 end

compared to:

def some_controller_method   @box = Box.new(:height => 5, :width => 10, :depth => 2) end

Then your view calls @box.height, etc...

Aaron