Category:Epsilon (game engine)
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Rails 3: Global variable scope
We have a rails app which currently has a global variable we would like to keep across multiple views. This particular variable is initialized in one controller and then passed to a method in a model. There are currently two potential ways to accomplish this:
1. Pass the variable as an argument to a method in a model.
model.method_name(:my_variable)
2. Define the variable in the controllers file and reference it from the views.
ViewHelper.my_variable
Is one approach preferred over the other? I'm leaning towards the first approach as it is more along the lines of what I think the convention should be.
A:
IMO, it's not recommended to use globals. This is definitely not encouraged in Ruby and Rails has pretty good conventions to follow.
However, it's completely fine to have variables scoped to a specific controller or model.
I prefer to put globals in config/initializers/ in the cases I need to access them from more than one controller/model and with or without a certain condition I'm using them.
It's a very fine practice to put them in a specific folder which makes it easier to make changes if needed.
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