available_action?(action_name)
Instance Public methods
Returns true if a method for the action is available and can be dispatched,
false otherwise.
Notice that action_methods.include?("foo") may
return false and available_action?("foo") returns
true because this method considers actions that are also available through
other means, for example, implicit render ones.
Parameters
action_name - The name of an action to be tested
Returns
TrueClass, FalseClass