diff --git a/src/bulkinserter.h b/src/bulkinserter.h
index 04df4b2..9f450b4 100644
--- a/src/bulkinserter.h
+++ b/src/bulkinserter.h
@@ -5,6 +5,7 @@
 #include <QDebug>
 #include "defines.h"
 #include "phrases/phraselist.h"
+#include "phrases/fieldphrase.h"
 
 NUT_BEGIN_NAMESPACE
 
@@ -30,6 +31,63 @@ public:
     int apply();
 };
 
+//#define HEAD(x, ...) x
+//#define TAIL(x, ...) __VA_ARGS__
+//#define ENCLOSE(...) ( __VA_ARGS__ )
+//#define REM_ENCLOSE_(...) __VA_ARGS__
+//#define REM_ENCLOSE(...) REM_ENCLOSE_ __VA_ARGS__
+
+//#define IF_ENCLOSED_1(true, ...) true
+//#define IF_ENCLOSED_0(true, ...) __VA_ARGS__
+//#define IF_ENCLOSED(...) CAT(IF_ENCLOSED_, IF_ENCLOSED(__VA_ARGS__))
+//// This function will optionally remove brackets around its arguments
+//// if there are any. Otherwise it will return normally
+//#define OPT_REM_ENCLOSE(...) \
+//  IF_ENCLOSED (__VA_ARGS__) ( REM_ENCLOSE(__VA_ARGS__), __VA_ARGS__ )
+
+//#define TEST_LAST EXISTS(1)
+//#define IS_LIST_EMPTY(...) \
+//  TRY_EXTRACT_EXISTS( \
+//    DEFER(HEAD) (__VA_ARGS__ EXISTS(1))\
+//  , 0)
+//#define IS_LIST_NOT_EMPTY(...) NOT(IS_LIST_EMPTY(__VA_ARGS__))
+
+//#define FOR_EACH(fVisitor, ...) \
+//    fVisitor( OPT_REM_ENCLOSE(HEAD(__VA_ARGS__)) ) \
+//    FOR_EACH(fVisitor, TAIL(__VA_ARGS__))
+
+//#define NUT_FOREACH(F, ...) \
+//    F(HEAD(__VA_ARGS__)); \
+//    NUT_FOREACH(F, TAIL(__VA_ARGS__))
+//template <typename... ETC>
+//class Bulk
+//{
+//public:
+//    void f(int){}
+//    Bulk()
+//    {
+//        int a, b, c, d;
+//        NUT_FOREACH(f, a, c, d)
+
+//    }
+//};
+
+//template <typename T1, typename... ETC>
+//class Bulk<T1, ETC...>
+//{
+//public:
+//    Bulk(FieldPhrase<T1>)
+//    {}
+//};
+
+//template <typename T1, typename T2, typename... ETC>
+//class Bulk<T1, T2, ETC...>
+//{
+//public:
+//    Bulk(FieldPhrase<T1>, FieldPhrase<T2>)
+//    {}
+//};
+
 NUT_END_NAMESPACE
 
 #endif // BULKINSERTER_H
diff --git a/src/query.h b/src/query.h
index d5cc823..ef582a6 100644
--- a/src/query.h
+++ b/src/query.h
@@ -83,7 +83,7 @@ public:
     QVariant min(const FieldPhrase<int> &f);
     QVariant average(const FieldPhrase<int> &f);
 
-    QVariant insert(AssignmentPhraseList p);
+    QVariant insert(const AssignmentPhraseList &p);
 
     //data mailpulation
     int update(const AssignmentPhraseList &ph);
@@ -91,6 +91,7 @@ public:
     int remove();
 
     QSqlQueryModel *toModel();
+    void toModel(QSqlQueryModel *model);
 
     //debug purpose
     QString sqlCommand() const;
@@ -410,7 +411,7 @@ Q_OUTOFLINE_TEMPLATE QVariant Query<T>::average(const FieldPhrase<int> &f)
 }
 
 template<class T>
-Q_OUTOFLINE_TEMPLATE QVariant Query<T>::insert(AssignmentPhraseList p)
+Q_OUTOFLINE_TEMPLATE QVariant Query<T>::insert(const AssignmentPhraseList &p)
 {
     Q_D(Query);
     d->sql = d->database->sqlGenertor()
@@ -541,6 +542,14 @@ Q_OUTOFLINE_TEMPLATE int Query<T>::remove()
 
 template <class T>
 Q_OUTOFLINE_TEMPLATE QSqlQueryModel *Query<T>::toModel()
+{
+    QSqlQueryModel *model = new QSqlQueryModel;
+    toModel(model);
+    return model;
+}
+
+template <class T>
+Q_OUTOFLINE_TEMPLATE void Query<T>::toModel(QSqlQueryModel *model)
 {
     Q_D(Query);
 
@@ -551,7 +560,6 @@ Q_OUTOFLINE_TEMPLATE QSqlQueryModel *Query<T>::toModel()
                 d->skip, d->take);
 
     DatabaseModel dbModel = d->database->model();
-    QSqlQueryModel *model = new QSqlQueryModel;
     model->setQuery(d->sql, d->database->database());
 
     int fieldIndex = 0;
@@ -573,8 +581,6 @@ Q_OUTOFLINE_TEMPLATE QSqlQueryModel *Query<T>::toModel()
                                  f->displayName);
         }
     }
-
-    return model;
 }
 
 template <class T>