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39
40#ifndef QSQLRELATIONALTABLEMODEL_H
41#define QSQLRELATIONALTABLEMODEL_H
42
43#include <QtSql/qtsqlglobal.h>
44#include <QtSql/qsqltablemodel.h>
45
46#include <QtCore/qtypeinfo.h>
47
48QT_REQUIRE_CONFIG(sqlmodel);
49
50QT_BEGIN_NAMESPACE
51
52
53class Q_SQL_EXPORT QSqlRelation
54{
55public:
56 QSqlRelation() {}
57 QSqlRelation(const QString &aTableName, const QString &indexCol,
58 const QString &displayCol)
59 : tName(aTableName), iColumn(indexCol), dColumn(displayCol) {}
60
61 void swap(QSqlRelation &other) noexcept
62 {
63 qSwap(value1&: tName, value2&: other.tName);
64 qSwap(value1&: iColumn, value2&: other.iColumn);
65 qSwap(value1&: dColumn, value2&: other.dColumn);
66 }
67
68 inline QString tableName() const
69 { return tName; }
70 inline QString indexColumn() const
71 { return iColumn; }
72 inline QString displayColumn() const
73 { return dColumn; }
74 bool isValid() const noexcept
75 { return !(tName.isEmpty() || iColumn.isEmpty() || dColumn.isEmpty()); }
76private:
77 QString tName, iColumn, dColumn;
78};
79Q_DECLARE_SHARED_NOT_MOVABLE_UNTIL_QT6(QSqlRelation)
80
81class QSqlRelationalTableModelPrivate;
82
83class Q_SQL_EXPORT QSqlRelationalTableModel: public QSqlTableModel
84{
85 Q_OBJECT
86
87public:
88 enum JoinMode {
89 InnerJoin,
90 LeftJoin
91 };
92
93 explicit QSqlRelationalTableModel(QObject *parent = nullptr,
94 QSqlDatabase db = QSqlDatabase());
95 virtual ~QSqlRelationalTableModel();
96
97 QVariant data(const QModelIndex &item, int role = Qt::DisplayRole) const override;
98 bool setData(const QModelIndex &item, const QVariant &value, int role = Qt::EditRole) override;
99 bool removeColumns(int column, int count, const QModelIndex &parent = QModelIndex()) override;
100
101 void clear() override;
102 bool select() override;
103
104 void setTable(const QString &tableName) override;
105 virtual void setRelation(int column, const QSqlRelation &relation);
106 QSqlRelation relation(int column) const;
107 virtual QSqlTableModel *relationModel(int column) const;
108 void setJoinMode( QSqlRelationalTableModel::JoinMode joinMode );
109
110public Q_SLOTS:
111 void revertRow(int row) override;
112
113protected:
114 QString selectStatement() const override;
115 bool updateRowInTable(int row, const QSqlRecord &values) override;
116 bool insertRowIntoTable(const QSqlRecord &values) override;
117 QString orderByClause() const override;
118
119private:
120 Q_DECLARE_PRIVATE(QSqlRelationalTableModel)
121};
122
123QT_END_NAMESPACE
124
125#endif // QSQLRELATIONALTABLEMODEL_H
126

source code of qtbase/src/sql/models/qsqlrelationaltablemodel.h