Merge pull request #551 from oxarbitrage/change-proposal-index

change proposal index from non unique to unique composite key

libraries/chain/include/graphene/chain/proposal_object.hpp

@@ -27,6 +27,7 @@
 #include <graphene/chain/transaction_evaluation_state.hpp>
 
 #include <graphene/db/generic_index.hpp>
+#include <boost/multi_index/composite_key.hpp>
 
 namespace graphene { namespace chain {
 
@@ -83,7 +84,13 @@ typedef boost::multi_index_container<
    proposal_object,
    indexed_by<
       ordered_unique< tag< by_id >, member< object, object_id_type, &object::id > >,
-      ordered_non_unique< tag< by_expiration >, member< proposal_object, time_point_sec, &proposal_object::expiration_time > >
+      //ordered_non_unique< tag< by_expiration >, member< proposal_object, time_point_sec, &proposal_object::expiration_time > >
+      ordered_unique<tag<by_expiration>,
+         composite_key<proposal_object,
+            member<proposal_object, time_point_sec, &proposal_object::expiration_time>,
+            member< object, object_id_type, &object::id >
+         >
+      >
    >
 > proposal_multi_index_container;
 typedef generic_index<proposal_object, proposal_multi_index_container> proposal_index;