操作sqlite数据库，使用qsqlqueryModel绑定数据，并实现对数据的修改

看大佬的相关博客发现 QsqlQueryModel只读属性，要让其可编辑要重写flags方法，要让其可修改要重写setData方法

具体代码如下：

widget构造函数主要实现加载sqlite数据库，如果没有数据库则创建。

widget.cpp文件

#include "widget.h"

#include <QSqlQueryModel>

#include <QSqlError>

#include <QSqlQuery>

#include <QDebug>

#include <QDir>

#include <QFile>

#include <QTableView>

#include <QStandardItem>

#include <QSqlTableModel>

#include <QUuid>

MysqlQueryModel::MysqlQueryModel(QObject *parent):QSqlQueryModel(parent)

{

}

MysqlQueryModel::~MysqlQueryModel()

{

}

Qt::ItemFlags MysqlQueryModel::flags(const QModelIndex &index) const

{

    Qt::ItemFlags flags = QSqlQueryModel::flags(index);

    if (index.column() != 0)

    {

        flags |= Qt::ItemIsEditable;

    }

    return flags;

}

bool MysqlQueryModel::setData(const QModelIndex &index, const QVariant &value, int role)

{

    QModelIndex pkIndex = QSqlQueryModel::index(index.row(), 0);

    QString sId = data(pkIndex).toString();

    if(index.column() == 1)//姓名

    {

        QSqlQuery query;

        query.prepare("UPDATE Person SET name = :name WHERE id = :id");

        query.bindValue(":name",value.toString());

        query.bindValue(":id",sId);

        bool isOk = query.exec();

        setQuery("select * from Person");

        setHeaderData(0, Qt::Horizontal, "id");

        setHeaderData(1, Qt::Horizontal, "name");

        setHeaderData(2, Qt::Horizontal, "telephone");

    }

    else {

        QSqlQuery query;

        query.prepare("UPDATE Person SET telephone = :telephone WHERE id = :id");

        query.bindValue(":telephone",value.toString());

        query.bindValue(":id",sId);

        bool isOk = query.exec();

        setQuery("select * from Person");

        setHeaderData(0, Qt::Horizontal, "id");

        setHeaderData(1, Qt::Horizontal, "name");

        setHeaderData(2, Qt::Horizontal, "telephone");

    }

}

Widget::Widget(QWidget *parent)

    : QWidget(parent)

{

    QString spath = QDir::currentPath()+"/MyDataBasetest.db";

    QFile f(spath);

    bool is = f.exists(spath);

    if(!is)

    {

        m_database = QSqlDatabase::addDatabase("QSQLITE");

        m_database.setDatabaseName("MyDataBasetest.db");

        m_database.setUserName("zbl");

        m_database.setPassword("123456");

        m_database.open();

        QString sql = QString("create table Person(id int primary key,  name varchar(30), telephone varchar(13) not null)");

        QSqlQuery query(m_database);

        bool isSuccess = query.exec(sql);

        if(!isSuccess)

        {

            m_database.close();

            m_database.removeDatabase("zbl2");

            return;

        }

         query.prepare("insert into Person(id, name, telephone) values (?, ?, ?)");

         QVariantList ids;

         ids<< QUuid::createUuid().toString()<< QUuid::createUuid().toString()<< QUuid::createUuid().toString()<< QUuid::createUuid().toString();

          query.addBindValue(ids);

         QVariantList nameList;

         nameList << "张三" << "李四" << "王五" << "小6";

         query.addBindValue(nameList);

         QVariantList telp;

         telp << "123" << "134" << "125" << "192";

         query.addBindValue(telp);

         if (!query.execBatch())

         {

             qDebug() << query.lastError();

         }

    }

    else {

        m_database = QSqlDatabase::addDatabase("QSQLITE");

        m_database.setDatabaseName("MyDataBasetest.db");

        m_database.setUserName("zbl");

        m_database.setPassword("123456");

        m_database.open();

    }

   m_database.open();

   MysqlQueryModel *Model = new MysqlQueryModel;

   Model->setQuery("select *from Person");

   Model->setHeaderData(0, Qt::Horizontal, "id");

   Model->setHeaderData(1, Qt::Horizontal, "name");

   Model->setHeaderData(2, Qt::Horizontal, "telephone");

//   QSqlTableModel *Model = new QSqlTableModel(this, m_database);

//    Model->setTable("Person");

//    Model->select();

//    Model->removeColumn(0);

//   /Model->setEditStrategy(QSqlTableModel::OnManualSubmit);

    QTableView *view = new QTableView(this);

    QStandardItem *item = new QStandardItem();

  //  view->setSelectionMode(item);

   // view->setEditTriggers(QAbstractItemView::DoubleClicked);

    view->setModel(Model);

    QItemSelectionModel *selection = new  QItemSelectionModel(Model);

    view->setSelectionModel(selection);

    connect(selection, SIGNAL(selectionChanged(QItemSelection,QItemSelection)), view, SLOT(selectionChanged(QItemSelection,QItemSelection)));

    //view->resizeColumnsToContents();

    view->show();

    view->resize(this->size());

}

Widget::~Widget()

{

}

widget.h文件如下：

#ifndef WIDGET_H

#define WIDGET_H

#include <QWidget>

#include <QSqlDatabase>

#include <QItemSelection>

#include <QSqlQueryModel>

class Widget : public QWidget

{

    Q_OBJECT

public:

    Widget(QWidget *parent = 0);

    ~Widget();

private:

    QSqlDatabase m_database;

public slots:

};

class MysqlQueryModel:public QSqlQueryModel

{

    Q_OBJECT

public:

    explicit MysqlQueryModel(QObject *parent = Q_NULLPTR);

    virtual ~MysqlQueryModel();

    virtual bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole);

    Qt::ItemFlags flags(const QModelIndex &index) const;

};

#endif // WIDGET_H