X-Git-Url: https://git.toastfreeware.priv.at/toast/confclerk.git/blobdiff_plain/5a73d273c52b554484cf5e3ae56deee9255d9389..83481c684518420be3c2d2c604ba85b2e72be9e4:/src/orm/ormrecord.h

diff --git a/src/orm/ormrecord.h b/src/orm/ormrecord.h
index 754bc4f..8357b6b 100644
--- a/src/orm/ormrecord.h
+++ b/src/orm/ormrecord.h
@@ -1,42 +1,227 @@
+/*
+ * Copyright (C) 2010 Ixonos Plc.
+ * Copyright (C) 2011-2013 Philipp Spitzer, gregor herrmann, Stefan Stahl
+ *
+ * This file is part of ConfClerk.
+ *
+ * ConfClerk is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * ConfClerk is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * ConfClerk.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef ORMRECORD_H
+#define ORMRECORD_H
+
+#include <QSqlQuery>
 #include <QSqlRecord>
 #include <QSqlField>
+#include <QSqlError>
+#include <QStringList>
+#include <QDateTime>
+#include <QDebug>
+
+class OrmException
+{
+public:
+    OrmException(const QString& text) : mText(text) {}
+    virtual ~OrmException(){}
+    virtual const QString& text() const { return mText; }
+private:
+    QString mText;
+};
+
+class OrmNoObjectException : public OrmException
+{
+public:
+    OrmNoObjectException() : OrmException("No object exception"){}
+    ~OrmNoObjectException(){}
+};
+
+class OrmSqlException : public OrmException
+{
+public:
+    OrmSqlException(const QString& text) : OrmException( QString("Sql error: ") + text ) {}
+    ~OrmSqlException(){}
+};
 
 template <typename T>
 class OrmRecord : protected QSqlRecord
 {
 public:
-    static QString colName(int col);
+    OrmRecord();
+    static T hydrate(const QSqlRecord& record);
+    void update(QString col, QVariant value = QVariant()); // updates specified column 'col'
 
 protected:
-    QVariant value(int col) const;
-    void setValue(int col, QVariant value);
+    QVariant value(QString col) const;
+    void setValue(QString col, QVariant value);
+
+    static T loadOne(QSqlQuery query);
+    static QList<T> load(QSqlQuery query);
+
+    // auxiliary methods
+    static QSqlRecord toRecord(const QList<QSqlField> & columnList);
+    // all record items/columns are in one table
+    static QString columnsForSelect(const QString& prefix = QString());
+    static QString selectQuery();
+    static QString updateQuery();
+
+    static QVariant convertToC(QVariant value, QVariant::Type colType);
+    static QVariant convertToDb(QVariant value, QVariant::Type colType);
 };
 
 template <typename T>
-QString OrmRecord<T>::colName(int col)
+OrmRecord<T>::OrmRecord()
 {
-    return T::sColNames.at(col);
+    QSqlRecord::operator=(T::sColumns);
 }
 
 template <typename T>
-QVariant OrmRecord<T>::value(int col) const
+T OrmRecord<T>::hydrate(const QSqlRecord& record)
 {
-    Q_ASSERT(col >= 0 && col < T::sColNames.count());
+    T object;
+    object.QSqlRecord::operator=(record);
+    return object;
+}
 
-    return QSqlRecord::value(T::sColNames.at(col));
+// updates specified column 'col'
+// if the value is not specified as an argument,
+// it's taken from the record itself
+// see also: setValue() method for more details
+template <typename T>
+void OrmRecord<T>::update(QString col, QVariant value)
+{
+    QSqlQuery query;
+    query.prepare(QString(updateQuery() + "SET %1 = :col WHERE id = :id").arg(col));
+    if(value.isValid()) // take 'col' value from the method's arguments
+        query.bindValue(":col", value);
+    else // take 'col' value from the record; see setValue()
+        query.bindValue(":col", convertToDb(this->value(col), this->value(col).type()));
+    query.bindValue(":id", this->value("id"));
+    query.exec();
 }
 
 template <typename T>
-void OrmRecord<T>::setValue(int col, QVariant value)
+QVariant OrmRecord<T>::value(QString col) const
 {
-    Q_ASSERT(col >= 0 && col < T::sColNames.count());
+    return convertToC(QSqlRecord::value(col), T::sColumns.field(col).type());
+}
+
+template <typename T>
+void OrmRecord<T>::setValue(QString col, QVariant value)
+{
+    QSqlRecord::setValue(col, convertToDb(value, T::sColumns.field(col).type()));
+}
+
+template <typename T>
+T OrmRecord<T>::loadOne(QSqlQuery query)
+{
+    if (!query.isActive())
+    {
+        if (!query.exec())
+        {
+            throw OrmSqlException(query.lastError().text());
+        }
+    }
 
-    QString fieldName = T::sColNames.at(col);
+    if (!query.next())
+    {
+        throw OrmNoObjectException();
+    }
+
+    return hydrate(query.record());
+}
 
-    if (!contains(fieldName))
+template <typename T>
+QList<T> OrmRecord<T>::load(QSqlQuery query)
+{
+    if (!query.isActive())
     {
-        append(QSqlField(fieldName, value.type()));
+        if (!query.exec())
+        {
+            qDebug() << "Error: " << query.lastError().driverText() << "; Type: " << query.lastError().type();
+            throw OrmSqlException(query.lastError().text());
+        }
     }
 
-    QSqlRecord::setValue(fieldName, value);
+    QList<T> objects;
+    while (query.next())
+    {
+        objects << hydrate(query.record());
+    }
+    return objects;
 }
+
+template <typename T>
+QString OrmRecord<T>::columnsForSelect(const QString& prefix)
+{
+    QStringList prefixedColumns;
+    for (int i=0; i<T::sColumns.count(); i++)
+    {
+        prefixedColumns.append(prefix.isEmpty() ?
+            T::sColumns.field(i).name() :
+            QString("%1.%2").arg(prefix, T::sColumns.field(i).name()));
+    }
+    return prefixedColumns.join(",");
+}
+
+template <typename T>
+QString OrmRecord<T>::selectQuery()
+{
+    return QString("SELECT %1 FROM %2 ").arg(columnsForSelect(), T::sTableName);
+}
+
+template <typename T>
+QString OrmRecord<T>::updateQuery()
+{
+    return QString("UPDATE %1 ").arg(T::sTableName);
+}
+
+template <typename T>
+QSqlRecord OrmRecord<T>::toRecord(const QList<QSqlField> & columnList)
+{
+    QSqlRecord record;
+    for(int i=0; i< columnList.count(); i++)
+    {
+        record.append(columnList[i]);
+    }
+    return record;
+}
+
+template <typename T>
+QVariant OrmRecord<T>::convertToC(QVariant value, QVariant::Type colType)
+{
+    if (colType == QVariant::DateTime && value.canConvert<uint>())
+    {
+        QDateTime date;
+        date.setTimeSpec(Qt::UTC);
+        date.setTime_t(value.toUInt());
+        return date;
+    }
+
+    return value;
+}
+
+template <typename T>
+QVariant OrmRecord<T>::convertToDb(QVariant value, QVariant::Type colType)
+{
+    if (colType == QVariant::DateTime && value.canConvert<QDateTime>())
+    {
+        QDateTime dateTime = value.toDateTime();
+        dateTime.setTimeSpec(Qt::UTC); // this is to avoid that dateTime.toTime_t changes the time depending on the local time zone
+        return dateTime.toTime_t();
+    }
+
+    return value;
+}
+
+#endif // ORMRECORD_H
+