QSqlTableModel中的错误继承了表

Question

我有这个类继承自QSqlTableModel，它在调用insertPoint几次之后调用submitAll（）插槽之后会中断。这是代码。

感谢您的帮助。

问候。

#ifndef VWLANDMARKTABLEMODEL_H 
#define VWLANDMARKTABLEMODEL_H 

#include <QSqlTableModel> 

class GraphicsPointLandmarkItem; 

class VWLandmarkTableModel : public QSqlTableModel 
{ 
    Q_OBJECT 
public: 
    enum Column { 
     IdColumn=0, 
     IdImageColumn=1, 
     UsernameColumn=2, 
     NameColumn=3, 
     DefinitionColumn=4 
    }; 

    VWLandmarkTableModel(QObject *parent=0); 

    int idImage() const { return m_idImage; } 
    QString username() const { return m_username; } 
    void setIdImage(int idImage); 
    void setUsername(const QString &username); 
    virtual bool select(); 
    bool insertPoint(GraphicsPointLandmarkItem *item); 
signals: 
protected: 
    virtual void setFilter(const QString &filter) 
     { QSqlTableModel::setFilter(filter); } 
    virtual bool insertRowIntoTable(const QSqlRecord &values); 
protected slots: 
    void setDefaults(int row, QSqlRecord &r); 
private: 
    QString m_username; 
    int m_idImage; 
}; 

#endif // VWLANDMARKTABLEMODEL_H 


#include "vwlandmarktablemodel.h" 

#include <QtGui> 
#include <QtSql> 
#include <QtCore> 

#include "graphicspointlandmarkitem.h" 

VWLandmarkTableModel::VWLandmarkTableModel(QObject *parent) 
    : QSqlTableModel(parent) 
{ 
    setTable("vwLandmark"); 
    setEditStrategy(OnManualSubmit); 

    connect(this, SIGNAL(primeInsert(int,QSqlRecord&)), 
     SLOT(setDefaults(int,QSqlRecord&))); 
} 

void VWLandmarkTableModel::setIdImage(int idImage) 
{ m_idImage=idImage; } 

void VWLandmarkTableModel::setUsername(const QString &username) 
{ m_username=username; } 

bool VWLandmarkTableModel::select() 
{ 
    Q_ASSERT(!username().isEmpty()); 

    QString stmt="IdImage = %1 AND Username = '%2'"; 

    setFilter(stmt.arg(idImage()).arg(username())); 
    return QSqlTableModel::select(); 
} 

bool VWLandmarkTableModel::insertPoint(GraphicsPointLandmarkItem *item) 
{ 
    QString text; 
    QTextStream out(&text); 
    int row=rowCount(); 
    bool ok; 

    ok=insertRow(row); Q_ASSERT(ok); 

    QModelIndex idx=index(row, DefinitionColumn); 

    out<<*item; 
    ok=setData(idx, text); 
    Q_ASSERT(ok); 
    idx=index(row, NameColumn); 
    ok=setData(idx, tr("New point landmark")); 
    Q_ASSERT(ok); 
    return ok; 
} 

bool VWLandmarkTableModel::insertRowIntoTable(const QSqlRecord &values) 
{ 
    QString sql="EXEC InsertLandmark :IdImage,:Definition"; 
    QSqlQuery q; 
    bool ok; 

    ok=q.prepare(sql); Q_ASSERT(ok); 
    q.bindValue(":IdImage", values.value("IdImage")); 
    q.bindValue(":Definition", values.value("Definition")); 
    q.setForwardOnly(true); 
    if(!q.exec()) { 
     setLastError(q.lastError()); 
     return false; 
    } 
    qDebug()<<"hola mundo"; 
    return true; 
} 

void VWLandmarkTableModel::setDefaults(int row, QSqlRecord &r) 
{ 
    r.setValue("IdImage", idImage()); 
    r.setValue("Name", "Unnamed landmark"); 
    r.setValue("Username", username()); 
} 

Answer 1

问题出在我的自定义选择中。调用setFilter（）会导致无限调用循环