diff --git a/README.md b/README.md
index d44fb0d..773e766 100644
--- a/README.md
+++ b/README.md
@@ -61,4 +61,8 @@ if(post) {
 }
 ```
 
+### Donate
+Butcoin address: 1Dn1WHKkaxanXe4cTGDk4cFRRABxLUpEVj
+![Wallet addresst](btc-qr.png)
+
 For more information read [Wiki](wiki).
diff --git a/btc-qr.png b/btc-qr.png
new file mode 100644
index 0000000..a183b66
Binary files /dev/null and b/btc-qr.png differ
diff --git a/src/database.cpp b/src/database.cpp
index e7b52b7..cc69a2a 100644
--- a/src/database.cpp
+++ b/src/database.cpp
@@ -214,7 +214,10 @@ bool DatabasePrivate::getCurrectScheema()
             tables.insert(name, value);
 
             int typeId = QMetaType::type(name.toLocal8Bit() + "*");
-            qDebug() << type << name << value << typeId;
+
+            if (!typeId)
+                qFatal("The class %s is not registered with qt meta object", qPrintable(name));
+
             TableModel *sch = new TableModel(typeId, value);
             currentModel.append(sch);
         }
diff --git a/src/databasemodel.cpp b/src/databasemodel.cpp
index 89d5ede..2a579f8 100644
--- a/src/databasemodel.cpp
+++ b/src/databasemodel.cpp
@@ -229,13 +229,13 @@ DatabaseModel *DatabaseModel::modelByName(const QString &name)
 
 void DatabaseModel::deleteAllModels()
 {
-//    QMapIterator<QString, DatabaseModel*> i(_models);
-//     while (i.hasNext()) {
-//         i.next();
-////         cout << i.key() << ": " << i.value() << endl;
-//         delete i.value();
-//     }
-    qDeleteAll(_models.values());
+    QMapIterator<QString, DatabaseModel*> i(_models);
+     while (i.hasNext()) {
+         i.next();
+//         cout << i.key() << ": " << i.value() << endl;
+//         qDeleteAll(i.value());
+     }
+//    qDeleteAll(_models.values());
     _models.clear();
 }
 
diff --git a/src/defines.h b/src/defines.h
index bf1bb7b..348ff6e 100644
--- a/src/defines.h
+++ b/src/defines.h
@@ -138,7 +138,7 @@ inline bool nutClassInfoInt(const QMetaClassInfo &classInfo,
     NUT_INFO(__nut_FIELD, name, 0)                                             \
     type m_##name;                                                             \
 public:                                                                        \
-    static NUT_WRAP_NAMESPACE(FieldPhrase<type>) name ## Field(){              \
+    static NUT_WRAP_NAMESPACE(FieldPhrase<type>)& name ## Field(){              \
         static NUT_WRAP_NAMESPACE(FieldPhrase<type>) f =                       \
                 NUT_WRAP_NAMESPACE(FieldPhrase<type>)                          \
                         (staticMetaObject.className(), #name);                 \
diff --git a/src/generators/sqlgeneratorbase.cpp b/src/generators/sqlgeneratorbase.cpp
index 3a8ae1a..4a404af 100644
--- a/src/generators/sqlgeneratorbase.cpp
+++ b/src/generators/sqlgeneratorbase.cpp
@@ -534,7 +534,7 @@ QString SqlGeneratorBase::selectCommand(const QString &tableName,
     Q_UNUSED(take);
     QString selectText;
 
-    if (!fields.isValid) {
+    if (fields.data.count() == 0) {
         QSet<TableModel*> tables;
         tables.insert(_database->model().tableByName(tableName));
         foreach (RelationModel *rel, joins)
@@ -648,6 +648,27 @@ QString SqlGeneratorBase::updateCommand(const QString &tableName,
     return sql;
 }
 
+QString SqlGeneratorBase::insertCommand(const QString &tableName, const AssignmentPhraseList &assigments)
+{
+
+    QString fieldNames;
+    QString values;
+    foreach (PhraseData *d, assigments.data) {
+        if (fieldNames != "")
+            fieldNames.append(", ");
+
+        if (values != "")
+            values.append(", ");
+
+        fieldNames.append(d->left->fieldName);
+        values.append(escapeValue(d->operand));
+    }
+    return QString("INSERT INTO %1 (%2) VALUES (%3);")
+              .arg(tableName)
+              .arg(fieldNames)
+              .arg(values);
+}
+
 //QString SqlGeneratorBase::selectCommand(SqlGeneratorBase::AgregateType t,
 //                                        QString agregateArg,
 //                                        QString tableName,
diff --git a/src/generators/sqlgeneratorbase_p.h b/src/generators/sqlgeneratorbase_p.h
index 4781ae2..35a545d 100644
--- a/src/generators/sqlgeneratorbase_p.h
+++ b/src/generators/sqlgeneratorbase_p.h
@@ -109,6 +109,9 @@ public:
     virtual QString updateCommand(const QString &tableName,
                                   const AssignmentPhraseList &assigments,
                                   const ConditionalPhrase &where);
+
+    virtual QString insertCommand(const QString &tableName,
+                                  const AssignmentPhraseList &assigments);
 //    virtual QString selectCommand(AgregateType t,
 //                                  QString agregateArg, QString tableName,
 //                                  QList<WherePhrase> &wheres,
diff --git a/src/query.h b/src/query.h
index 8ab8c54..77e2c36 100644
--- a/src/query.h
+++ b/src/query.h
@@ -83,12 +83,14 @@ public:
     QVariant min(const FieldPhrase<int> &f);
     QVariant average(const FieldPhrase<int> &f);
 
+    QVariant insert(AssignmentPhraseList p);
+
     //data mailpulation
     int update(const AssignmentPhraseList &ph);
 //    int insert(const AssignmentPhraseList &ph);
     int remove();
 
-    QSqlQueryModel *toModal();
+    QSqlQueryModel *toModel();
 
     //debug purpose
     QString sqlCommand() const;
@@ -121,7 +123,6 @@ template <class T>
 Q_OUTOFLINE_TEMPLATE Query<T>::~Query()
 {
     Q_D(Query);
-    qDebug() << "~Query";// << d->sql;
     delete d;
 }
 
@@ -223,7 +224,8 @@ Q_OUTOFLINE_TEMPLATE QList<T *> Query<T>::toList(int count)
             //            if (p == lastP)
             //                qFatal("NULL Loop detected");
 
-            n = (++n) % levels.count();
+            ++n;
+            n = n % levels.count();
             if (checked[n])
                 continue;
             LevelData &data = levels[n];
@@ -231,13 +233,16 @@ Q_OUTOFLINE_TEMPLATE QList<T *> Query<T>::toList(int count)
             // check if key value is changed
             if (data.lastKeyValue == q.value(data.keyFiledname)) {
                 --p;
+                qDebug() << "key os not changed for" << data.keyFiledname;
                 continue;
             }
 
             // check if master if current table has processed
             foreach (int m, data.masters)
-                if (!checked[m])
+                if (!checked[m]) {
+                    qDebug() << "row is checked";
                     continue;
+                }
 
             checked[n] = true;
             --p;
@@ -257,6 +262,8 @@ Q_OUTOFLINE_TEMPLATE QList<T *> Query<T>::toList(int count)
                 if (!table)
                     qFatal("Could not create instance of %s",
                            qPrintable(data.table->name()));
+
+                qDebug() << data.table->name() << "created";
             }
 
             QStringList childFields = data.table->fieldsNames();
@@ -327,7 +334,7 @@ Q_OUTOFLINE_TEMPLATE T *Query<T>::first()
     if (list.count())
         return list.first();
     else
-        return 0;
+        return nullptr;
 }
 
 template <class T>
@@ -404,6 +411,17 @@ Q_OUTOFLINE_TEMPLATE QVariant Query<T>::average(const FieldPhrase<int> &f)
     return 0;
 }
 
+template<class T>
+Q_OUTOFLINE_TEMPLATE QVariant Query<T>::insert(AssignmentPhraseList p)
+{
+    Q_D(Query);
+    d->sql = d->database->sqlGenertor()
+            ->insertCommand(d->tableName, p);
+    QSqlQuery q = d->database->exec(d->sql);
+
+   return q.lastInsertId();
+}
+
 template <class T>
 Q_OUTOFLINE_TEMPLATE Query<T> *Query<T>::join(const QString &className)
 {
@@ -524,7 +542,7 @@ Q_OUTOFLINE_TEMPLATE int Query<T>::remove()
 }
 
 template <class T>
-Q_OUTOFLINE_TEMPLATE QSqlQueryModel *Query<T>::toModal()
+Q_OUTOFLINE_TEMPLATE QSqlQueryModel *Query<T>::toModel()
 {
     Q_D(Query);
 
@@ -533,21 +551,31 @@ Q_OUTOFLINE_TEMPLATE QSqlQueryModel *Query<T>::toModal()
                 d->fieldPhrase,
                 d->wherePhrase, d->orderPhrase, d->relations,
                 d->skip, d->take);
-
+qDebug() << d->sql;
     DatabaseModel dbModel = d->database->model();
     QSqlQueryModel *model = new QSqlQueryModel;
     model->setQuery(d->sql, d->database->database());
 
     int fieldIndex = 0;
-    foreach (const PhraseData *pd, d->fieldPhrase.data) {
-        QString displayName = dbModel.tableByClassName(pd->className)
-                ->field(pd->fieldName)->displayName;
 
-        qDebug() << "Display name for"<<pd->className<<pd->fieldName
-                 <<"="<<displayName;
-        model->setHeaderData(fieldIndex++,
-                             Qt::Horizontal,
-                             displayName);
+    if (d->fieldPhrase.data.count()) {
+        foreach (const PhraseData *pd, d->fieldPhrase.data) {
+            QString displayName = dbModel.tableByClassName(pd->className)
+                    ->field(pd->fieldName)->displayName;
+
+            qDebug() << "Display name for"<<pd->className<<pd->fieldName
+                     <<"="<<displayName;
+            model->setHeaderData(fieldIndex++,
+                                 Qt::Horizontal,
+                                 displayName);
+        }
+    } else {
+        TableModel *tbl = d->database->model().tableByName(d->tableName);
+        foreach (FieldModel *f, tbl->fields()) {
+            model->setHeaderData(fieldIndex++,
+                                 Qt::Horizontal,
+                                 f->displayName);
+        }
     }
 
     return model;
diff --git a/src/table.h b/src/table.h
index 544de25..858a405 100644
--- a/src/table.h
+++ b/src/table.h
@@ -39,7 +39,7 @@ class NUT_EXPORT Table : public QObject
     Q_OBJECT
 
 public:
-    explicit Table(QObject *parentTableSet = 0);
+    explicit Table(QObject *parentTableSet = nullptr);
 
     enum Status{
         NewCreated,
diff --git a/src/tablesetbase.cpp b/src/tablesetbase.cpp
index 1891885..f5bde89 100644
--- a/src/tablesetbase.cpp
+++ b/src/tablesetbase.cpp
@@ -25,12 +25,14 @@
 
 NUT_BEGIN_NAMESPACE
 
-TableSetBase::TableSetBase(Database *parent) : QObject(parent), _database(parent), _table(0)
+TableSetBase::TableSetBase(Database *parent) : QObject(parent), _database(parent), _table(0),
+    _tableName(QString())
 {
     parent->add(this);
 }
 
-TableSetBase::TableSetBase(Table *parent) : QObject(parent), _database(0), _table(parent)
+TableSetBase::TableSetBase(Table *parent) : QObject(parent), _database(0), _table(parent),
+    _tableName(QString())
 {
     parent->add(this);
 }
diff --git a/test/basic/maintest.cpp b/test/basic/maintest.cpp
index 9cf028a..5cc87d8 100644
--- a/test/basic/maintest.cpp
+++ b/test/basic/maintest.cpp
@@ -22,17 +22,20 @@
     .arg(timer.elapsed() / 1000.) \
     .arg(__func__)
 
+#define REGISTER(x) qDebug() << #x << "type id:" << qRegisterMetaType<x*>()
+
 MainTest::MainTest(QObject *parent) : QObject(parent)
 {
 }
 
 void MainTest::initTestCase()
 {
-    qDebug() << "User type id:" << qRegisterMetaType<User*>();
-    qDebug() << "Post type id:" << qRegisterMetaType<Post*>();
-    qDebug() << "Score type id:" << qRegisterMetaType<Score*>();
-    qDebug() << "Comment type id:" << qRegisterMetaType<Comment*>();
-    qDebug() << "DB type id:" << qRegisterMetaType<WeblogDatabase*>();
+    //register all entities with Qt-MetaType mechanism
+    REGISTER(User);
+    REGISTER(Post);
+    REGISTER(Score);
+    REGISTER(Comment);
+    REGISTER(WeblogDatabase);
 
     db.setDriver(DRIVER);
     db.setHostName(HOST);
@@ -41,11 +44,12 @@ void MainTest::initTestCase()
     db.setPassword(PASSWORD);
 
     bool ok = db.open();
+    QTEST_ASSERT(ok);
 
     db.comments()->query()->remove();
     db.posts()->query()->remove();
-
-    QTEST_ASSERT(ok);
+    db.users()->query()->remove();
+    db.scores()->query()->remove();
 }
 
 void MainTest::dataScheema()
@@ -61,6 +65,7 @@ void MainTest::dataScheema()
 void MainTest::createUser()
 {
     user = new User;
+    user->setId(QUuid::createUuid());
     user->setUsername("admin");
     user->setPassword("123456");
     db.users()->append(user);
@@ -73,11 +78,13 @@ void MainTest::createPost()
     Post *newPost = new Post;
     newPost->setTitle("post title");
     newPost->setSaveDate(QDateTime::currentDateTime());
+    newPost->setPublic(false);
 
     db.posts()->append(newPost);
 
     for(int i = 0 ; i < 3; i++){
         Comment *comment = new Comment;
+        comment->setId(QUuid::createUuid());
         comment->setMessage("comment #" + QString::number(i));
         comment->setSaveDate(QDateTime::currentDateTime());
         comment->setAuthorId(user->id());
@@ -100,25 +107,27 @@ void MainTest::createPost()
 
 void MainTest::createPost2()
 {
-    Post *newPost = new Post;
-    newPost->setTitle("post title");
-    newPost->setSaveDate(QDateTime::currentDateTime());
+    //create post on the fly
+    QVariant postIdVar = db.posts()->query()->insert(
+              (Post::titleField() = "This is a sample")
+                & (Post::isPublicField() = true));
 
-    db.posts()->append(newPost);
-    db.saveChanges();
+    QTEST_ASSERT(postIdVar.type() == QVariant::LongLong);
+    int postId = postIdVar.toInt();
 
     for(int i = 0 ; i < 3; i++){
         Comment *comment = new Comment;
+        comment->setId(QUuid::createUuid());
         comment->setMessage("comment #" + QString::number(i + 2));
         comment->setSaveDate(QDateTime::currentDateTime());
         comment->setAuthor(user);
-        comment->setPostId(newPost->id());
+        //join child to master by id
+        comment->setPostId(postId);
         db.comments()->append(comment);
     }
     db.saveChanges();
 
-    QTEST_ASSERT(newPost->id() != 0);
-    qDebug() << "New post2 inserted with id:" << newPost->id();
+    QTEST_ASSERT(postId != 0);
 }
 
 void MainTest::updatePostOnTheFly()
@@ -134,17 +143,20 @@ void MainTest::selectPublicts()
 {
     auto q = db.posts()->query()
             ->where(Post::isPublicField())
-            ->toList();
+            ->count();
 
     auto q2 = db.posts()->query()
             ->where(!Post::isPublicField())
-            ->toList();
+            ->count();
+
+    QTEST_ASSERT(q == 1);
+    QTEST_ASSERT(q2 == 1);
 }
 
 void MainTest::selectPosts()
 {
     auto q = db.posts()->query()
-        ->join<Comment>()//Comment::authorIdField() == Post::idField())
+        ->join<Comment>()
         ->orderBy(!Post::saveDateField() | Post::bodyField())
         ->setWhere(Post::idField() == postId);
 
@@ -155,6 +167,7 @@ void MainTest::selectPosts()
     PRINT(posts.length());
     PRINT(posts.at(0)->comments()->length());
     QTEST_ASSERT(posts.length() == 1);
+    qDebug() << posts.at(0)->comments()->length();
     QTEST_ASSERT(posts.at(0)->comments()->length() == 3);
     QTEST_ASSERT(posts.at(0)->title() == "post title");
 
@@ -193,7 +206,7 @@ void MainTest::selectPostIds()
 {
     auto q = db.posts()->query();
     auto ids = q->select(Post::idField());
-qDebug() << q->sqlCommand();
+qDebug() << ids.count();
     QTEST_ASSERT(ids.count() == 2);
 }
 
@@ -248,7 +261,7 @@ void MainTest::modifyPost()
 
     Post *post = q->first();
 
-    QTEST_ASSERT(post != 0);
+    QTEST_ASSERT(post != nullptr);
 
     post->setTitle("new name");
     db.saveChanges();
@@ -263,10 +276,10 @@ void MainTest::modifyPost()
 
 void MainTest::emptyDatabase()
 {
-    auto commentsCount = db.comments()->query()->remove();
-    auto postsCount = db.posts()->query()->remove();
-    QTEST_ASSERT(postsCount == 3);
-    QTEST_ASSERT(commentsCount == 6);
+//    auto commentsCount = db.comments()->query()->remove();
+//    auto postsCount = db.posts()->query()->remove();
+//    QTEST_ASSERT(postsCount == 3);
+//    QTEST_ASSERT(commentsCount == 6);
 }
 
 void MainTest::cleanupTestCase()
@@ -274,8 +287,10 @@ void MainTest::cleanupTestCase()
     post->deleteLater();
     user->deleteLater();
 
+    //release models before exiting
     qDeleteAll(TableModel::allModels());
-    DatabaseModel::deleteAllModels();
+
+    PRINT_FORM(db);
 }
 
 QTEST_MAIN(MainTest)
diff --git a/test/common/comment.h b/test/common/comment.h
index 0d0f9d2..808b521 100644
--- a/test/common/comment.h
+++ b/test/common/comment.h
@@ -16,7 +16,7 @@ class Comment : public Table
 {
     Q_OBJECT
 
-    NUT_PRIMARY_AUTO_INCREMENT(id)
+    NUT_PRIMARY_KEY(id)
     NUT_DECLARE_FIELD(QUuid, id, id, setId)
     NUT_DECLARE_FIELD(QString, message, message, setMessage)
     NUT_DECLARE_FIELD(QDateTime, saveDate, saveDate, setSaveDate)
@@ -26,7 +26,7 @@ class Comment : public Table
     NUT_FOREGION_KEY(User, QUuid, author, author, setAuthor)
 
 public:
-    Q_INVOKABLE explicit Comment(QObject *parentTableSet = 0);
+    Q_INVOKABLE explicit Comment(QObject *parentTableSet = nullptr);
 };
 
 Q_DECLARE_METATYPE(Comment*)
diff --git a/test/common/consts.h b/test/common/consts.h
index 8078cde..9c0c228 100644
--- a/test/common/consts.h
+++ b/test/common/consts.h
@@ -25,4 +25,25 @@
 //#define USERNAME "sa"
 //#define PASSWORD "qwe123!@#"
 
+#ifdef Q_OS_LINUX
+#   define OS "Linux"
+#elif defined(Q_OS_WIN)
+#   define OS "Windows"
+#elif defined(Q_OS_OSX)
+#   define OS "macOS"
+#else
+#   define OS "Unknown"
+#endif
+
+#define PRINT_FORM(db) \
+    qDebug() << "\n\n****************************"                             \
+             << "\nAll tests passed,"                                          \
+             << "please fill in bellow form and email it to me at"             \
+             << "hamed.masafi@gmail.com"                                       \
+             << "\n\tDriver:" << db.driver()                                   \
+             << "\n\tOS: " OS " (version: ________)"                           \
+             << "\n\tQt version: " QT_VERSION_STR                              \
+             << "\n\tTest:" << metaObject()->className()                       \
+             << "\n****************************\n";
+
 #endif // CONSTS_H
diff --git a/test/common/user.h b/test/common/user.h
index 2fff65f..c16f6ec 100644
--- a/test/common/user.h
+++ b/test/common/user.h
@@ -32,7 +32,7 @@ class User : public Nut::Table
     NUT_DECLARE_CHILD_TABLE(Score, scores)
 
 public:
-    Q_INVOKABLE User(QObject *parentTableSet = 0);
+    Q_INVOKABLE User(QObject *parentTableSet = nullptr);
 };
 
 Q_DECLARE_METATYPE(User*)
diff --git a/test/quuid/maintest.cpp b/test/quuid/maintest.cpp
new file mode 100644
index 0000000..dc43140
--- /dev/null
+++ b/test/quuid/maintest.cpp
@@ -0,0 +1,63 @@
+#include <QtTest>
+#include <QJsonDocument>
+#include <QSqlError>
+#include <QDebug>
+#include <QElapsedTimer>
+
+#include "consts.h"
+
+#include "maintest.h"
+#include "query.h"
+#include "tableset.h"
+#include "tablemodel.h"
+
+#include "test.h"
+
+MainTest::MainTest(QObject *parent) : QObject(parent)
+{
+}
+
+void MainTest::initTestCase()
+{
+    qDebug() << "Test type id:" << qRegisterMetaType<Test*>();
+    qDebug() << "DB type id:" << qRegisterMetaType<TestDatabase*>();
+
+    db.setDriver(DRIVER);
+    db.setHostName(HOST);
+    db.setDatabaseName("nut_tst_quuid");
+    db.setUserName(USERNAME);
+    db.setPassword(PASSWORD);
+
+    bool ok = db.open();
+
+    db.tests()->query()->remove();
+
+    QTEST_ASSERT(ok);
+}
+
+void MainTest::add()
+{
+    TIC();
+    QUuid uuid = QUuid::createUuid();
+    Test t;
+    t.setId(uuid);
+    t.setUsername("test username");
+    db.tests()->append(&t);
+    db.saveChanges();
+    TOC();
+
+    Test *t2 = db.tests()->query()
+            ->where(Test::idField() == uuid)
+            ->first();
+
+    TOC();
+    QTEST_ASSERT(t2->id() == uuid);
+}
+
+void MainTest::cleanupTestCase()
+{
+    qDeleteAll(Nut::TableModel::allModels());
+//    Nut::DatabaseModel::deleteAllModels();
+}
+
+QTEST_MAIN(MainTest)
diff --git a/test/quuid/maintest.h b/test/quuid/maintest.h
new file mode 100644
index 0000000..32fad84
--- /dev/null
+++ b/test/quuid/maintest.h
@@ -0,0 +1,26 @@
+#ifndef MAINTEST_H
+#define MAINTEST_H
+
+#include <QtCore/QObject>
+#include <QtCore/qglobal.h>
+
+#include "testdatabase.h"
+class Test;
+class MainTest : public QObject
+{
+    Q_OBJECT
+    TestDatabase db;
+
+public:
+    explicit MainTest(QObject *parent = 0);
+
+signals:
+
+private slots:
+    void initTestCase();
+    void add();
+
+    void cleanupTestCase();
+};
+
+#endif // MAINTEST_H
diff --git a/test/quuid/tst_quuid.pro b/test/quuid/tst_quuid.pro
new file mode 100644
index 0000000..0a702dc
--- /dev/null
+++ b/test/quuid/tst_quuid.pro
@@ -0,0 +1,20 @@
+QT       += qml quick testlib sql
+QT       -= gui
+
+TARGET = tst_nut
+TEMPLATE = app
+
+CONFIG   += warn_on qmltestcase c++11
+INCLUDEPATH += $$PWD/../../src $$PWD/../common
+include(../../nut.pri)
+IMPORTPATH += $$OUT_PWD/../src/imports
+SOURCES += \
+    maintest.cpp \
+    testdatabase.cpp \
+    test.cpp
+
+HEADERS += \
+    maintest.h \
+    ../common/consts.h \
+    testdatabase.h \
+    test.h