The crud now support inserting new rows

pglab/CrudModel.h

@@ -197,13 +197,25 @@ private:
 	bool callLoadData = false;
 
 	std::shared_ptr<Pgsql::Result> m_roData;
+	/// \brief Total number of rows to show.
+	///
+	/// The first n rows are the rows in m_roData.
+	/// While a row is being edited the modifications are in the PendingRowList
+	/// When the edits have been submitted the new values are put in the ModifiedRowList
+	///
+	/// The last row is for creating new rows. There is no data for this row or it is
+	/// in the PendingRowList. As soon as the row has been inserted a new last empty row
+	/// will be created by increasing this variable. And the newly stored row will be in
+	/// the modified list.
+	///
+	int m_rowCount = 0;
 
 	PendingRowList m_pendingRowList;
 
-	/** Maintains a list of all modified rows.
-	 *
-	 * The key values are the indexes of the row before any rows were deleted.
-	 */
+	/// \brief Maintains a list of all modified rows.
+	///
+	/// The key values are the indexes of the row before any rows were deleted.
+	///
 	ModifiedRowList m_modifiedRowList;
 
 	using RedirectVec = std::vector<int>;
@@ -236,13 +248,17 @@ private:
 	/// This function should not be called when there is no primarykey. (Editing should be disabled anyway in that case)
 	///
 	/// \param row Actual result row not intermeddiat model row
-	/// \return
+	/// \return The values of the primary key column. If this is a new row it will return an empty list
 	///
 	PKeyValues getPKeyForRow(int row) const;
 
 	bool savePendingChanges();
 
+	std::tuple<QString, Pgsql::Params> createUpdateQuery(const PKeyValues &pkey_values, const PendingRow &pending_row);
+	std::tuple<QString, Pgsql::Params> createInsertQuery(const PendingRow &pending_row);
 	std::tuple<bool, ModifiedRow> updateRow(const PendingRow &pending_row);
+
+	void appendNewRow();
 private slots:
 
 	void connectionStateChanged(ASyncDBConnection::State state);