Provide explanation for why a transition cannot be made.

mferrier · Jul 9, 2008 · c687591 · c687591
1 parent 59eb4a3
commit c687591
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/event.rb b/lib/event.rb
@@ -14,7 +14,7 @@ def initialize(name, options = {}, &block)
 
       def fire(obj, to_state=nil, *args)
         transitions = @transitions.select { |t| t.from == obj.aasm_current_state }
-        raise AASM::InvalidTransition if transitions.size == 0
+        raise AASM::InvalidTransition, "Event '#{name}' cannot transition from '#{obj.aasm_current_state}'" if transitions.size == 0
 
         next_state = nil
         transitions.each do |transition|