diff --git a/src/changelogtable.h b/src/changelogtable.h
index 27c4f70..84475a5 100644
--- a/src/changelogtable.h
+++ b/src/changelogtable.h
@@ -38,7 +38,7 @@ class ChangeLogTable : public Table
     NUT_DECLARE_FIELD(QString, version, version, setVersion)
 
 public:
-    ChangeLogTable(QObject *parentTableSet = Q_NULLPTR);
+    explicit ChangeLogTable(QObject *parentTableSet = Q_NULLPTR);
 };
 
 NUT_END_NAMESPACE
diff --git a/src/database.cpp b/src/database.cpp
index d8ac915..9d5983b 100644
--- a/src/database.cpp
+++ b/src/database.cpp
@@ -52,7 +52,9 @@ NUT_BEGIN_NAMESPACE
 qulonglong DatabasePrivate::lastId = 0;
 QMap<QString, DatabaseModel> DatabasePrivate::allTableMaps;
 
-DatabasePrivate::DatabasePrivate(Database *parent) : q_ptr(parent), isDatabaseNew(false)
+DatabasePrivate::DatabasePrivate(Database *parent) : q_ptr(parent),
+    port(0), sqlGenertor(0), changeLogs(0),
+    isDatabaseNew(false)
 {
 }
 
diff --git a/src/database.h b/src/database.h
index 9dbc08e..1885be5 100644
--- a/src/database.h
+++ b/src/database.h
@@ -43,9 +43,9 @@ class NUT_EXPORT Database : public QObject
     Q_DECLARE_PRIVATE(Database)
 
 public:
-    Database(QObject *parent = 0);
-    Database(const Database &other);
-    Database(const QSqlDatabase &other);
+    explicit Database(QObject *parent = 0);
+    explicit Database(const Database &other);
+    explicit Database(const QSqlDatabase &other);
     ~Database();
 
     bool open();
diff --git a/src/database_p.h b/src/database_p.h
index 7c8709d..3299e4a 100644
--- a/src/database_p.h
+++ b/src/database_p.h
@@ -35,7 +35,7 @@ class DatabasePrivate
     Q_DECLARE_PUBLIC(Database)
 
 public:
-    DatabasePrivate(Database *parent);
+    explicit DatabasePrivate(Database *parent);
 
     bool open(bool updateDatabase);
 
diff --git a/src/databasemodel.cpp b/src/databasemodel.cpp
index e5adc6d..792cda1 100644
--- a/src/databasemodel.cpp
+++ b/src/databasemodel.cpp
@@ -57,6 +57,11 @@ DatabaseModel::DatabaseModel(const QJsonObject &json) :
     }
 }
 
+DatabaseModel::DatabaseModel(DatabaseModel &model)
+{
+
+}
+
 TableModel *DatabaseModel::tableByName(QString tableName) const
 {
     for(int i = 0; i < size(); i++){
diff --git a/src/databasemodel.h b/src/databasemodel.h
index c4e25b8..e8342fd 100644
--- a/src/databasemodel.h
+++ b/src/databasemodel.h
@@ -43,6 +43,7 @@ public:
     DatabaseModel(const QString &name = QString::null);
     DatabaseModel(const DatabaseModel &other);
     DatabaseModel(const QJsonObject &json);
+    DatabaseModel(DatabaseModel &model);
 
     TableModel *tableByName(QString tableName) const;
     TableModel *tableByClassName(QString className) const;
diff --git a/src/generators/mysqlgenerator.h b/src/generators/mysqlgenerator.h
index d2224f4..c5916ba 100644
--- a/src/generators/mysqlgenerator.h
+++ b/src/generators/mysqlgenerator.h
@@ -29,7 +29,7 @@ NUT_BEGIN_NAMESPACE
 class MySqlGenerator : public SqlGeneratorBase
 {
 public:
-    MySqlGenerator(Database *parent = 0);
+    explicit MySqlGenerator(Database *parent = 0);
 
     QString fieldType(FieldModel *field);
     QString escapeValue(const QVariant &v) const;
diff --git a/src/generators/postgresqlgenerator.h b/src/generators/postgresqlgenerator.h
index 903cca8..028cea4 100644
--- a/src/generators/postgresqlgenerator.h
+++ b/src/generators/postgresqlgenerator.h
@@ -29,7 +29,7 @@ NUT_BEGIN_NAMESPACE
 class PostgreSqlGenerator : public SqlGeneratorBase
 {
 public:
-    PostgreSqlGenerator(Database *parent);
+    explicit PostgreSqlGenerator(Database *parent);
 
     QString fieldType(FieldModel *field);
 
diff --git a/src/generators/sqlgeneratorbase.cpp b/src/generators/sqlgeneratorbase.cpp
index 686c3d8..44efaec 100644
--- a/src/generators/sqlgeneratorbase.cpp
+++ b/src/generators/sqlgeneratorbase.cpp
@@ -959,7 +959,7 @@ QString SqlGeneratorBase::createConditionalPhrase(const PhraseData *d) const
         else if (op == PhraseData::AddMonths)
             ret = QString("DATEADD(month, %1, %2)")
                     .arg(d->operand.toString()).arg(createConditionalPhrase(d->left));
-        else if (op == PhraseData::AddYears)
+        else if (op == PhraseData::AddDays)
             ret = QString("DATEADD(day, %1, %2)")
                     .arg(d->operand.toString()).arg(createConditionalPhrase(d->left));
         else if (op == PhraseData::AddHours)
diff --git a/src/generators/sqlgeneratorbase_p.h b/src/generators/sqlgeneratorbase_p.h
index d8a2e8f..d0aa239 100644
--- a/src/generators/sqlgeneratorbase_p.h
+++ b/src/generators/sqlgeneratorbase_p.h
@@ -57,7 +57,7 @@ public:
         SignleField
     };
 
-    SqlGeneratorBase(Database *parent);
+    explicit SqlGeneratorBase(Database *parent);
     virtual ~SqlGeneratorBase();
 
     virtual QString masterDatabaseName(QString databaseName);
diff --git a/src/generators/sqlitegenerator.h b/src/generators/sqlitegenerator.h
index 1a28c32..5969cde 100644
--- a/src/generators/sqlitegenerator.h
+++ b/src/generators/sqlitegenerator.h
@@ -29,7 +29,7 @@ NUT_BEGIN_NAMESPACE
 class SqliteGenerator : public SqlGeneratorBase
 {
 public:
-    SqliteGenerator(Database *parent = 0);
+    explicit SqliteGenerator(Database *parent = 0);
 
     QString fieldType(FieldModel *field);
 
diff --git a/src/generators/sqlservergenerator.cpp b/src/generators/sqlservergenerator.cpp
index 549312b..7d0e128 100644
--- a/src/generators/sqlservergenerator.cpp
+++ b/src/generators/sqlservergenerator.cpp
@@ -126,7 +126,7 @@ QString SqlServerGenerator::escapeValue(const QVariant &v) const
         QPoint pt = v.toPoint();
         return QString("geography::POINT(%1, %2, 4326)").arg(pt.x()).arg(
             pt.y());
-    } else if (v.type() == QVariant::Point) {
+    } else if (v.type() == QVariant::PointF) {
         QPointF pt = v.toPointF();
         return QString("geography::POINT(%1, %2, 4326)").arg(pt.x()).arg(
             pt.y());
diff --git a/src/generators/sqlservergenerator.h b/src/generators/sqlservergenerator.h
index 28f6dca..4ef2f7c 100644
--- a/src/generators/sqlservergenerator.h
+++ b/src/generators/sqlservergenerator.h
@@ -29,7 +29,7 @@ NUT_BEGIN_NAMESPACE
 class SqlServerGenerator : public SqlGeneratorBase
 {
 public:
-    SqlServerGenerator(Database *parent = 0);
+    explicit SqlServerGenerator(Database *parent = 0);
 
     QString masterDatabaseName(QString databaseName);
 
diff --git a/src/phrase.cpp b/src/phrase.cpp
index 8a5800e..e70f01b 100644
--- a/src/phrase.cpp
+++ b/src/phrase.cpp
@@ -45,23 +45,20 @@ PhraseData::PhraseData(PhraseData *l, PhraseData::Condition o,
 
 PhraseData::PhraseData(PhraseData *l, PhraseData::Condition o, QVariant r)
     : className(0), fieldName(0),
-      type(WithVariant), operatorCond(o), left(new PhraseData(l)), operand(r), isNot(false)
+      type(WithVariant), operatorCond(o), left(new PhraseData(l)), right(0), operand(r), isNot(false)
 { }
 
-PhraseData::PhraseData(const PhraseData *other)
-{
-    left = other->left;
-    right = other->right;
-    operand = other->operand;
-    operatorCond = other->operatorCond;
-    className = other->className;
-    fieldName = other->fieldName;
-    type = other->type;
-    isNot = other->isNot;
-    if (type != Field) {
-        qDebug() << "Bug";
-    }
-}
+PhraseData::PhraseData(const PhraseData &other) :
+    left(other.left), right(other.right), operand(other.operand),
+    operatorCond(other.operatorCond), className(other.className),
+    fieldName(other.fieldName), type(other.type), isNot(other.isNot)
+{ }
+
+PhraseData::PhraseData(const PhraseData *other) :
+    left(other->left), right(other->right), operand(other->operand),
+    operatorCond(other->operatorCond), className(other->className),
+    fieldName(other->fieldName), type(other->type), isNot(other->isNot)
+{ }
 
 QString PhraseData::toString() const
 {
@@ -169,7 +166,7 @@ PhraseList::PhraseList() : isValid(false)
 
 }
 
-PhraseList::PhraseList(const PhraseList &other)
+PhraseList::PhraseList(const PhraseList &other) : isValid(true)
 {
     data = qMove(other.data);
 }
@@ -211,7 +208,10 @@ PhraseList PhraseList::operator |(PhraseList &other) {
     return PhraseList(this, &other);
 }
 
-AssignmentPhrase::AssignmentPhrase(AbstractFieldPhrase *l, QVariant r)
+AssignmentPhrase::AssignmentPhrase(PhraseData *d) : data(d)
+{ }
+
+AssignmentPhrase::AssignmentPhrase(AbstractFieldPhrase *l, const QVariant r)
 {
     data = new PhraseData(l->data, PhraseData::Equal, r);
 //    l->data = 0;
@@ -223,6 +223,17 @@ AssignmentPhrase::AssignmentPhrase(AbstractFieldPhrase *l, const AssignmentPhras
     //    l->data = 0;
 }
 
+AssignmentPhrase::AssignmentPhrase(AssignmentPhrase *ph, const QVariant &v)
+{
+    data = new PhraseData(ph->data, PhraseData::Equal, v);
+}
+
+//AssignmentPhrase::AssignmentPhrase(AssignmentPhrase &other)
+//{
+//    data = other.data;
+//    other.data = 0;
+//}
+
 AssignmentPhrase::~AssignmentPhrase()
 {
     if (data)
@@ -235,10 +246,10 @@ AssignmentPhrase::~AssignmentPhrase()
 //    qFatal("SS");
 //}
 
-//AssignmentPhraseList AssignmentPhrase::operator &(const AssignmentPhrase &other)
-//{
-//    return AssignmentPhraseList(this, &other);
-//}
+AssignmentPhraseList AssignmentPhrase::operator &(const AssignmentPhrase &other)
+{
+    return AssignmentPhraseList(this, &other);
+}
 
 AssignmentPhraseList::AssignmentPhraseList()
 {
@@ -256,6 +267,12 @@ AssignmentPhraseList::AssignmentPhraseList(AssignmentPhraseList *l, const Assign
     data.append(r->data);
 }
 
+AssignmentPhraseList::AssignmentPhraseList(AssignmentPhrase *l, const AssignmentPhrase *r)
+{
+    data.append(l->data);
+    data.append(r->data);
+}
+
 AssignmentPhraseList::AssignmentPhraseList(const AssignmentPhrase &r, const AssignmentPhrase &l)
 {
     data.append(l.data);
@@ -269,7 +286,8 @@ AssignmentPhraseList AssignmentPhraseList::operator &(const AssignmentPhrase &ph
 
 AssignmentPhraseList::~AssignmentPhraseList()
 {
-    qDeleteAll(data);
+//    qDeleteAll(data);
+//    data.clear();
 }
 
 ConditionalPhrase::ConditionalPhrase() : data(0)
@@ -355,7 +373,7 @@ ConditionalPhrase::~ConditionalPhrase()
         delete data;
 }
 
-ConditionalPhrase ConditionalPhrase::operator =(const ConditionalPhrase &other)
+ConditionalPhrase &ConditionalPhrase::operator =(const ConditionalPhrase &other)
 {
     this->data = new PhraseData(other.data);
     return *this;
@@ -390,27 +408,27 @@ ConditionalPhrase ConditionalPhrase::operator !()
     return f;
 }
 
-AssignmentPhraseList operator &(const AssignmentPhrase &l, const AssignmentPhrase &r)
-{
-    return AssignmentPhraseList(l, r);
-}
+//AssignmentPhraseList operator &(const AssignmentPhrase &l, const AssignmentPhrase &r)
+//{
+//    return AssignmentPhraseList(l, r);
+//}
 
-AssignmentPhraseList operator &(const AssignmentPhrase &l, AssignmentPhrase &&r)
-{
-    r.data = 0;
-    return AssignmentPhraseList(l, r);
-}
+//AssignmentPhraseList operator &(const AssignmentPhrase &l, AssignmentPhrase &&r)
+//{
+//    r.data = 0;
+//    return AssignmentPhraseList(l, r);
+//}
 
-AssignmentPhraseList operator &(AssignmentPhrase &&l, const AssignmentPhrase &r)
-{
-    l.data = 0;
-    return AssignmentPhraseList(l, r);
-}
+//AssignmentPhraseList operator &(AssignmentPhrase &&l, const AssignmentPhrase &r)
+//{
+//    l.data = 0;
+//    return AssignmentPhraseList(l, r);
+//}
 
-AssignmentPhraseList operator &(AssignmentPhrase &&l, AssignmentPhrase &&r)
-{
-    r.data = l.data = 0;
-    return AssignmentPhraseList(l, r);
-}
+//AssignmentPhraseList operator &(AssignmentPhrase &&l, AssignmentPhrase &&r)
+//{
+//    r.data = l.data = 0;
+//    return AssignmentPhraseList(l, r);
+//}
 
 NUT_END_NAMESPACE
diff --git a/src/phrase.h b/src/phrase.h
index d56b1dc..2535384 100644
--- a/src/phrase.h
+++ b/src/phrase.h
@@ -103,8 +103,8 @@ public:
     PhraseData(PhraseData *l, Condition o);
     PhraseData(PhraseData *l, Condition o, const PhraseData *r);
     PhraseData(PhraseData *l, Condition o, QVariant r);
-
-    PhraseData(const PhraseData *other);
+    explicit PhraseData(const PhraseData &other);
+    explicit PhraseData(const PhraseData *other);
 
     QString toString() const;
 
@@ -115,7 +115,7 @@ class AssignmentPhraseList
 {
 public:
     QList<PhraseData*> data;
-    AssignmentPhraseList();
+    explicit AssignmentPhraseList();
     AssignmentPhraseList(const AssignmentPhrase &l);
     AssignmentPhraseList(AssignmentPhraseList *l, const AssignmentPhrase *r);
     AssignmentPhraseList(AssignmentPhrase *l, const AssignmentPhrase *r);
@@ -130,25 +130,28 @@ class AssignmentPhrase
 {
 public:
     PhraseData *data;
-    AssignmentPhrase(AbstractFieldPhrase *l, QVariant r);
-    AssignmentPhrase(AbstractFieldPhrase *l, const AssignmentPhrase *r);
+    explicit AssignmentPhrase(PhraseData *d);
+    explicit AssignmentPhrase(AbstractFieldPhrase *l, const QVariant r);
+    explicit AssignmentPhrase(AbstractFieldPhrase *l, const AssignmentPhrase *r);
+    explicit AssignmentPhrase(AssignmentPhrase *ph, const QVariant &v);
+//    explicit AssignmentPhrase(AssignmentPhrase &other);
     ~AssignmentPhrase();
 //    AssignmentPhrase(AssignmentPhrase *l, const AssignmentPhrase *r);
 
-//    AssignmentPhraseList operator &(const AssignmentPhrase &other);
+    AssignmentPhraseList operator &(const AssignmentPhrase &other);
 
 };
 
-AssignmentPhraseList operator &(const AssignmentPhrase &l, const AssignmentPhrase &r);
-AssignmentPhraseList operator &(const AssignmentPhrase &l, AssignmentPhrase &&r);
-AssignmentPhraseList operator &(AssignmentPhrase &&l, const AssignmentPhrase &r);
-AssignmentPhraseList operator &(AssignmentPhrase &&l, AssignmentPhrase &&r);
+//AssignmentPhraseList operator &(const AssignmentPhrase &l, const AssignmentPhrase &r);
+//AssignmentPhraseList operator &(const AssignmentPhrase &l, AssignmentPhrase &&r);
+//AssignmentPhraseList operator &(AssignmentPhrase &&l, const AssignmentPhrase &r);
+//AssignmentPhraseList operator &(AssignmentPhrase &&l, AssignmentPhrase &&r);
 
 class PhraseList{
 public:
     bool isValid;
     QList<const PhraseData*> data;
-    PhraseList();
+    explicit PhraseList();
     PhraseList(const PhraseList &other);
     PhraseList(const AbstractFieldPhrase &other);
     PhraseList(const AbstractFieldPhrase *left, const AbstractFieldPhrase &right);
@@ -181,7 +184,7 @@ public:
     ConditionalPhrase(ConditionalPhrase *l, PhraseData::Condition cond, ConditionalPhrase &r);
     virtual ~ConditionalPhrase();
 
-    ConditionalPhrase operator =(const ConditionalPhrase &other);
+    ConditionalPhrase &operator =(const ConditionalPhrase &other);
     ConditionalPhrase operator ==(const QVariant &other);
     ConditionalPhrase operator ==(const AbstractFieldPhrase &other);
     ConditionalPhrase operator &&(const ConditionalPhrase &other);
@@ -267,8 +270,8 @@ public:
         return ConditionalPhrase(this, PhraseData::Like, term);
     }
 
-    AssignmentPhrase operator =(const QVariant &other) {
-        return AssignmentPhrase(this, other);
+    AssignmentPhrase operator =(const QVariant &v) {
+        return AssignmentPhrase(this, v);
     }
 };
 
diff --git a/src/query.cpp b/src/query.cpp
index eacf1ba..f8c79fd 100644
--- a/src/query.cpp
+++ b/src/query.cpp
@@ -23,7 +23,7 @@
 NUT_BEGIN_NAMESPACE
 
 QueryPrivate::QueryPrivate(QueryBase *parent) : q_ptr(parent),
-     skip(-1), take(-1)
+    database(0), tableSet(0), skip(-1), take(-1)
 {
 
 }
diff --git a/src/query.h b/src/query.h
index 28fb454..765d599 100644
--- a/src/query.h
+++ b/src/query.h
@@ -50,7 +50,7 @@ template <class T>
     bool m_autoDelete;
 
 public:
-    Query(Database *database, TableSetBase *tableSet, bool autoDelete);
+    explicit Query(Database *database, TableSetBase *tableSet, bool autoDelete);
     ~Query();
 
     //ddl
@@ -520,7 +520,7 @@ Q_OUTOFLINE_TEMPLATE int Query<T>::update(const AssignmentPhraseList &ph)
                 ph,
                 d->wherePhrase);
     QSqlQuery q = d->database->exec(d->sql);
-
+qDebug() << d->sql;
     if (m_autoDelete)
         deleteLater();
     return q.numRowsAffected();
diff --git a/src/query_p.h b/src/query_p.h
index 75c8f3b..1bb2b16 100644
--- a/src/query_p.h
+++ b/src/query_p.h
@@ -37,7 +37,7 @@ class QueryPrivate{
     Q_DECLARE_PUBLIC(QueryBase)
 
 public:
-    QueryPrivate(QueryBase *parent);
+    explicit QueryPrivate(QueryBase *parent);
     ~QueryPrivate();
 
     QString sql;
diff --git a/src/sqlmodel.cpp b/src/sqlmodel.cpp
index ff40fa3..9f1a870 100644
--- a/src/sqlmodel.cpp
+++ b/src/sqlmodel.cpp
@@ -85,4 +85,9 @@ QVariant SqlModel::data(const QModelIndex &index, int role) const
     return QVariant();
 }
 
+SqlModelPrivate::SqlModelPrivate()
+{
+
+}
+
 NUT_END_NAMESPACE
diff --git a/src/sqlmodel.h b/src/sqlmodel.h
index e7c5e60..e8c2590 100644
--- a/src/sqlmodel.h
+++ b/src/sqlmodel.h
@@ -36,7 +36,7 @@ class SqlModel : public QAbstractTableModel
     Q_OBJECT
 
 public:
-    SqlModel(Database *database, TableSetBase *tableSet, QObject *parent = Q_NULLPTR);
+    explicit SqlModel(Database *database, TableSetBase *tableSet, QObject *parent = Q_NULLPTR);
 
     int rowCount(const QModelIndex &parent) const;
     int columnCount(const QModelIndex &parent) const;
diff --git a/src/sqlmodel_p.h b/src/sqlmodel_p.h
index edd8dc8..7b68e88 100644
--- a/src/sqlmodel_p.h
+++ b/src/sqlmodel_p.h
@@ -13,6 +13,8 @@ class SqlModelPrivate {
     SqlModel *q_ptr;
     Q_DECLARE_PUBLIC(SqlModel)
 public:
+    explicit SqlModelPrivate();
+
     QString tableName;
 
     QList<Table*> rows;
diff --git a/src/table.cpp b/src/table.cpp
index eeea6ec..e3deae5 100644
--- a/src/table.cpp
+++ b/src/table.cpp
@@ -39,7 +39,7 @@ NUT_BEGIN_NAMESPACE
  *  This should be fixed to v1.2
  */
 
-Table::Table(QObject *parent) : QObject(parent), myModel(0)
+Table::Table(QObject *parent) : QObject(parent), myModel(0), _parentTableSet(0)
 {
     setStatus(NewCreated);
 }
diff --git a/src/tablemodel.cpp b/src/tablemodel.cpp
index 882edd7..b42269a 100644
--- a/src/tablemodel.cpp
+++ b/src/tablemodel.cpp
@@ -408,6 +408,7 @@ FieldModel::FieldModel(const QJsonObject &json)
     isAutoIncrement = json.value(__nut_AUTO_INCREMENT).toBool();
     isPrimaryKey = json.value(__nut_PRIMARY_KEY).toBool();
     defaultValue = json.value(__nut_DEFAULT_VALUE).toString();
+    isUnique = json.value(__nut_UNIQUE).toBool();
 }
 
 QJsonObject FieldModel::toJson() const
@@ -429,6 +430,7 @@ RelationModel::RelationModel(const QJsonObject &obj)
     localProperty = obj.value("localProperty").toString();
     masterClassName = obj.value("masterClassName").toString();
     foreignColumn = obj.value("foreignColumn").toString();
+    slaveTable = masterTable = 0;
 }
 
 QJsonObject RelationModel::toJson() const
diff --git a/src/tablemodel.h b/src/tablemodel.h
index 4fe2f66..c2439c5 100644
--- a/src/tablemodel.h
+++ b/src/tablemodel.h
@@ -31,13 +31,13 @@ NUT_BEGIN_NAMESPACE
 
 class TableModel;
 struct FieldModel{
-    FieldModel() : name(QString::null), length(0), defaultValue(QString::null),
+    explicit FieldModel() : name(QString::null), length(0), defaultValue(QString::null),
         notNull(false), isPrimaryKey(false), isAutoIncrement(false), isUnique(false)
     {
 
     }
 
-    FieldModel(const QJsonObject &json);
+    explicit FieldModel(const QJsonObject &json);
 
     QString name;
     //TODO: QMetaType::Type??
@@ -73,7 +73,7 @@ struct RelationModel{
     RelationModel() : localColumn(""), localProperty(""), slaveTable(0),
         foreignColumn(""), masterTable(0), masterClassName("")
     {}
-    RelationModel(const QJsonObject &obj);
+    explicit RelationModel(const QJsonObject &obj);
 
     //slave
     QString localColumn;
@@ -92,9 +92,8 @@ bool operator !=(const RelationModel &l, const RelationModel &r);
 class TableModel
 {
 public:
-
-    TableModel(int typeId, QString tableName = QString::null);
-    TableModel(QJsonObject json, QString tableName);
+    explicit TableModel(int typeId, QString tableName = QString::null);
+    explicit TableModel(QJsonObject json, QString tableName);
 
     QJsonObject toJson() const;
 
diff --git a/src/tableset.h b/src/tableset.h
index d62fe73..8034a09 100644
--- a/src/tableset.h
+++ b/src/tableset.h
@@ -39,8 +39,8 @@ template<class T>
 class NUT_EXPORT TableSet : public TableSetBase
 {
 public:
-    TableSet(Database *parent);
-    TableSet(Table *parent);
+    explicit TableSet(Database *parent);
+    explicit TableSet(Table *parent);
 
     void append(T *t);
     void append(QList<T *> t);
diff --git a/src/tablesetbase_p.h b/src/tablesetbase_p.h
index 801c11b..df95a71 100644
--- a/src/tablesetbase_p.h
+++ b/src/tablesetbase_p.h
@@ -35,8 +35,8 @@ class TableSetBase : public QObject
 {
 
 public:
-    TableSetBase(Database *parent);
-    TableSetBase(Table *parent);
+    explicit TableSetBase(Database *parent);
+    explicit TableSetBase(Table *parent);
 
     virtual int save(Database *db, bool cleanUp = false);
     void clearChilds();
diff --git a/src/types/dbgeography.h b/src/types/dbgeography.h
index 9a7dfd0..3fd834a 100644
--- a/src/types/dbgeography.h
+++ b/src/types/dbgeography.h
@@ -35,8 +35,8 @@ class NUT_EXPORT DbGeography
 
 public:
     explicit DbGeography();
-    DbGeography(const DbGeography &other);
-    DbGeography(const QVariant &value);
+    explicit DbGeography(const DbGeography &other);
+    explicit DbGeography(const QVariant &value);
 
     qreal longitude() const;
     qreal latitude() const;
diff --git a/test/basic/maintest.cpp b/test/basic/maintest.cpp
index f7e491a..a8a75be 100644
--- a/test/basic/maintest.cpp
+++ b/test/basic/maintest.cpp
@@ -69,6 +69,7 @@ void MainTest::createUser()
 
 void MainTest::createPost()
 {
+    TIC();
     Post *newPost = new Post;
     newPost->setTitle("post title");
     newPost->setSaveDate(QDateTime::currentDateTime());
@@ -93,6 +94,7 @@ void MainTest::createPost()
     postId = newPost->id();
 
     QTEST_ASSERT(newPost->id() != 0);
+    TOC();
     qDebug() << "New post inserted with id:" << newPost->id();
 }
 
@@ -119,12 +121,24 @@ void MainTest::createPost2()
     qDebug() << "New post2 inserted with id:" << newPost->id();
 }
 
+void MainTest::updatePostOnTheFly()
+{
+    auto c = db.postTable()->query()
+            ->where(Post::idField() == postId)
+            ->update(Post::titleField() = "New title");
+
+    QTEST_ASSERT(c == 1);
+}
+
 void MainTest::selectPublicts()
 {
     auto q = db.postTable()->query()
             ->where(Post::isPublicField())
             ->toList();
 
+    auto q2 = db.postTable()->query()
+            ->where(!Post::isPublicField())
+            ->toList();
 }
 
 void MainTest::selectPosts()
diff --git a/test/basic/maintest.h b/test/basic/maintest.h
index f03b91f..87eaab0 100644
--- a/test/basic/maintest.h
+++ b/test/basic/maintest.h
@@ -27,6 +27,7 @@ private slots:
     void createUser();
     void createPost();
     void createPost2();
+    void updatePostOnTheFly();
     void selectPublicts();
     void join();
     void selectPosts();