15 OrmException(const QString& text) : mText(text) {};
16 virtual ~OrmException(){};
17 virtual const QString& text() const { return mText; }
22 class OrmNoObjectException : public OrmException
25 OrmNoObjectException() : OrmException("No object exception"){};
26 ~OrmNoObjectException(){};
29 class OrmSqlException : public OrmException
32 OrmSqlException(const QString& text) : OrmException( QString("Sql error: ") + text ) {};
37 class OrmRecord : protected QSqlRecord
41 static T hydrate(const QSqlRecord& record);
42 void update(QString col, QVariant value = QVariant()); // updates specified column 'col'
45 QVariant value(QString col) const;
46 void setValue(QString col, QVariant value);
48 static T loadOne(QSqlQuery query);
49 static QList<T> load(QSqlQuery query);
52 static QSqlRecord toRecord(const QList<QSqlField> & columnList);
53 // all record items/columns are in one table
54 static QString columnsForSelect(const QString& prefix = QString());
55 static QString selectQuery();
56 static QString updateQuery();
58 static QVariant convertToC(QVariant value, QVariant::Type colType);
59 static QVariant convertToDb(QVariant value, QVariant::Type colType);
63 OrmRecord<T>::OrmRecord()
65 QSqlRecord::operator=(T::sColumns);
69 T OrmRecord<T>::hydrate(const QSqlRecord& record)
72 object.QSqlRecord::operator=(record);
76 // updates specified column 'col'
77 // if the value is not specified as an argument,
78 // it's taken from the reford itself
79 // see also: setValue() method for more details
81 void OrmRecord<T>::update(QString col, QVariant value)
84 query.prepare(QString(updateQuery() + "SET %1 = :col WHERE id = :id").arg(col));
85 if(value.isValid()) // take 'col' value from the method's arguments
86 query.bindValue(":col", value);
87 else // take 'col' value from the record; see setValue()
88 query.bindValue(":col", convertToDb(this->value(col), this->value(col).type()));
89 query.bindValue(":id", this->value("id"));
90 //query.bindValue(":id", convertToDb(value("id"), QVariant::Int));
95 QVariant OrmRecord<T>::value(QString col) const
97 return convertToC(QSqlRecord::value(col), T::sColumns.field(col).type());
100 template <typename T>
101 void OrmRecord<T>::setValue(QString col, QVariant value)
103 QSqlRecord::setValue(col, convertToDb(value, T::sColumns.field(col).type()));
106 template <typename T>
107 T OrmRecord<T>::loadOne(QSqlQuery query)
109 if (!query.isActive())
113 throw OrmSqlException(query.lastError().text());
119 throw OrmNoObjectException();
122 return hydrate(query.record());
125 template <typename T>
126 QList<T> OrmRecord<T>::load(QSqlQuery query)
128 if (!query.isActive())
132 qDebug() << "Error: " << query.lastError().driverText() << "; Type: " << query.lastError().type();
133 throw OrmSqlException(query.lastError().text());
137 /*qDebug() << "SQL OK";*/
144 objects << hydrate(query.record());
146 /*qDebug() << "Fetch done";*/
150 template <typename T>
151 QString OrmRecord<T>::columnsForSelect(const QString& prefix)
153 QStringList prefixedColumns;
154 for (int i=0; i<T::sColumns.count(); i++)
156 prefixedColumns.append(prefix.isEmpty() ?
157 T::sColumns.field(i).name() :
158 QString("%1.%2").arg(prefix, T::sColumns.field(i).name()));
160 return prefixedColumns.join(",");
163 template <typename T>
164 QString OrmRecord<T>::selectQuery()
166 return QString("SELECT %1 FROM %2 ").arg(columnsForSelect(), T::sTableName);
169 template <typename T>
170 QString OrmRecord<T>::updateQuery()
172 return QString("UPDATE %1 ").arg(T::sTableName);
175 template <typename T>
176 QSqlRecord OrmRecord<T>::toRecord(const QList<QSqlField> & columnList)
179 foreach (const QSqlField & col, columnList)
186 template <typename T>
187 QVariant OrmRecord<T>::convertToC(QVariant value, QVariant::Type colType)
189 if (colType == QVariant::DateTime && value.canConvert<uint>())
192 date.setTimeSpec(Qt::UTC);
193 date.setTime_t(value.toUInt());
200 template <typename T>
201 QVariant OrmRecord<T>::convertToDb(QVariant value, QVariant::Type colType)
203 if (colType == QVariant::DateTime && value.canConvert<QDateTime>())
205 return value.toDateTime().toTime_t();
211 #endif // ORMRECORD_H