added isOpen()/connectEagerly()/pingDatabase()

- added connectEagerly() that allows to force connection to the DB
 - added isOpen()
 - exposed isOpen()/connectEagerly()/pingDatabase() to DB and
   DatabaseManager

include/orm/databaseconnection.hpp

@@ -157,6 +157,8 @@ namespace Schema
         void bindValues(QSqlQuery &query,
                         const QVector<QVariant> &bindings) const;
 
+        /*! Determine whether the database connection is currently open. */
+        inline bool isOpen();
         /*! Check database connection and show warnings when the state changed. */
         virtual bool pingDatabase();
 
@@ -165,6 +167,9 @@ namespace Schema
         void reconnect() const;
         /*! Disconnect from the underlying Qt's connection. */
         void disconnect();
+        /*! Force connection to the database (creates physical connection), doesn't have
+            to be called before querying a database. */
+        inline QSqlDatabase connectEagerly();
 
         /*! Get the query grammar used by the connection. */
         inline const QueryGrammar &getQueryGrammar() const;
@@ -196,8 +201,6 @@ namespace Schema
         inline const QString &getDatabaseName() const;
         /*! Get the host name of the connected database. */
         inline const QString &getHostName() const;
-        /*! Determine whether the database connection is currently open. */
-        inline bool isOpen();
 
         /* Others */
         /*! Execute the given callback in "dry run" mode. */
@@ -371,6 +374,18 @@ namespace Schema
         return m_qtConnectionResolver;
     }
 
+    bool DatabaseConnection::isOpen()
+    {
+        return m_qtConnection && getQtConnection().isOpen();
+    }
+
+    QSqlDatabase DatabaseConnection::connectEagerly()
+    {
+        reconnectIfMissingConnection();
+
+        return getQtConnection();
+    }
+
     const QueryGrammar &DatabaseConnection::getQueryGrammar() const
     {
         return *m_queryGrammar;
@@ -413,11 +428,6 @@ namespace Schema
         return m_hostName;
     }
 
-    inline bool DatabaseConnection::isOpen()
-    {
-        return m_qtConnection && getQtConnection().isOpen();
-    }
-
     bool DatabaseConnection::pretending() const
     {
         return m_pretending;

include/orm/databasemanager.hpp

@@ -104,7 +104,12 @@ namespace Query
         /*! Rollback to a named transaction savepoint. */
         bool rollbackToSavepoint(std::size_t id);
         /*! Get the number of active transactions. */
-        std::size_t transactionLevel();
+        std::size_t transactionLevel(const QString &connection = "");
+
+        /*! Determine whether the database connection is currently open. */
+        bool isOpen(const QString &connection = "");
+        /*! Check database connection and show warnings when the state changed. */
+        bool pingDatabase(const QString &connection = "");
 
         /* DatabaseManager */
         /*! Obtain a shared pointer to the DatabaseManager. */
@@ -132,6 +137,9 @@ namespace Query
         DatabaseConnection &reconnect(const QString &name = "");
         /*! Disconnect from the given database. */
         void disconnect(const QString &name = "") const;
+        /*! Force connection to the database (creates physical connection), doesn't have
+            to be called before querying a database. */
+        QSqlDatabase connectEagerly(const QString &name = "");
 
         /*! Get all of the support drivers. */
         QStringList supportedDrivers() const;
@@ -256,8 +264,6 @@ namespace Query
         const QString &databaseName(const QString &connection = "");
         /*! Return the host name of the connected database. */
         const QString &hostName(const QString &connection = "");
-        /*! Determine whether the database connection is currently open. */
-        bool isOpen(const QString &connection = "");
 
         /* Others */
         /*! Execute the given callback in "dry run" mode. */

include/orm/db.hpp

@@ -64,6 +64,9 @@ namespace Orm
         static DatabaseConnection &reconnect(const QString &name = "");
         /*! Disconnect from the given database. */
         static void disconnect(const QString &name = "");
+        /*! Force connection to the database (creates physical connection), doesn't have
+            to be called before querying a database. */
+        static QSqlDatabase connectEagerly(const QString &name = "");
 
         /*! Get all of the support drivers. */
         static QStringList supportedDrivers();
@@ -141,6 +144,11 @@ namespace Orm
         /*! Get the number of active transactions. */
         static std::size_t transactionLevel(const QString &connection = "");
 
+        /*! Determine whether the database connection is currently open. */
+        static bool isOpen(const QString &connection = "");
+        /*! Check database connection and show warnings when the state changed. */
+        static bool pingDatabase(const QString &connection = "");
+
         /* Queries execution time counter */
         /*! Determine whether we're counting queries execution time. */
         static bool
@@ -254,8 +262,6 @@ namespace Orm
         static const QString &databaseName(const QString &connection = "");
         /*! Return the host name of the connected database. */
         static const QString &hostName(const QString &connection = "");
-        /*! Determine whether the database connection is currently open. */
-        static bool isOpen(const QString &connection = "");
 
         /* Others */
         /*! Execute the given callback in "dry run" mode. */

src/orm/databasemanager.cpp

@@ -188,6 +188,16 @@ size_t DatabaseManager::transactionLevel()
     return connection().transactionLevel();
 }
 
+bool DatabaseManager::isOpen(const QString &connection)
+{
+    return this->connection(connection).isOpen();
+}
+
+bool DatabaseManager::pingDatabase(const QString &connection)
+{
+    return this->connection(connection).pingDatabase();
+}
+
 namespace
 {
     const auto *const InstanceExceptionMessage =
@@ -319,6 +329,11 @@ void DatabaseManager::disconnect(const QString &name) const
     (*m_connections).find(name_)->second->disconnect();
 }
 
+QSqlDatabase DatabaseManager::connectEagerly(const QString &name)
+{
+    return connection(name).connectEagerly();
+}
+
 QStringList DatabaseManager::supportedDrivers() const
 {
     // FUTURE add method to not only supported drivers, but also check if driver is available/loadable by qsqldatabase silverqx
@@ -671,11 +686,6 @@ DatabaseManager::hostName(const QString &connection)
     return this->connection(connection).getHostName();
 }
 
-bool DatabaseManager::isOpen(const QString &connection)
-{
-    return this->connection(connection).isOpen();
-}
-
 QVector<Log>
 DatabaseManager::pretend(const std::function<void()> &callback,
                          const QString &connection)

src/orm/db.cpp

@@ -67,6 +67,11 @@ void DB::disconnect(const QString &name)
     manager().disconnect(name);
 }
 
+QSqlDatabase DB::connectEagerly(const QString &name)
+{
+    return manager().connectEagerly(name);
+}
+
 QStringList DB::supportedDrivers()
 {
     return manager().supportedDrivers();
@@ -208,6 +213,16 @@ size_t DB::transactionLevel(const QString &connection)
     return manager().connection(connection).transactionLevel();
 }
 
+bool DB::isOpen(const QString &connection)
+{
+    return manager().connection(connection).isOpen();
+}
+
+bool DB::pingDatabase(const QString &connection)
+{
+    return manager().connection(connection).pingDatabase();
+}
+
 bool DB::countingElapsed(const QString &connection)
 {
     return manager().connection(connection).countingElapsed();
@@ -429,11 +444,6 @@ const QString &DB::hostName(const QString &connection)
     return manager().connection(connection).getHostName();
 }
 
-bool DB::isOpen(const QString &connection)
-{
-    return manager().connection(connection).isOpen();
-}
-
 QVector<Log>
 DB::pretend(const std::function<void()> &callback, const QString &connection)
 {