Rails 4 before_action, pass parameters to invoked method
RubyRuby Problem Overview
I have the following code:
class SupportsController < ApplicationController
before_action :set_support, only: [:show, :edit, :update, :destroy]
....
Is it possible to pass a string to the method set_support to be applied for all 4 view methods?
Is it possible to pass a different string to the method set_support for each method in the view?
Ruby Solutions
Solution 1 - Ruby
before_action only: [:show, :edit, :update, :destroy] do
set_support("value")
end
Solution 2 - Ruby
You can use a lambda:
class SupportsController < ApplicationController
before_action -> { set_support("value") },
only: [:show, :edit, :update, :destroy]
...
Solution 3 - Ruby
A short and one-liner answer (which I personally prefer for callbacks) is:
before_action except:[:index, :show] { method :param1, :param2 }
Another example:
after_filter only:[:destroy, :kerplode] { method2_namey_name(p1, p2) }
Solution 4 - Ruby
You can pass a lambda to the before_action and pass params[:action] to the set_support method like this:
class SupportsController < ApplicationController
before_action only: [:show, :edit, :update, :destroy] {|c| c.set_support params[:action]}
....
Then the param being sent is one of the strings: 'show', 'edit', 'update' or 'destroy'.
Solution 5 - Ruby
The SupportsController
class SupportsController < ApplicationController
before_action only: [:show, :edit, :update, :destroy] { |ctrl|
ctrl.set_support("the_value")
}
...
The ApplicationController
class ApplicationController < ActionController
def set_support (value = "")
p value
end
...