Database error handling.

core/autoform.h

@@ -8,10 +8,13 @@
 #include <QMetaMethod>
 #include <QDebug>
 #include <QVariant>
+#include <QMessageBox>
 
 #include "iform.h"
 #include "service.h"
 #include "ivalidator.h"
+#include "iservice.h"
+#include "iplugin.h"
 
 
 template <class T>
@@ -20,6 +23,8 @@ class AutoForm : public IForm
 public:
     explicit AutoForm(QWidget *parent = 0) : IForm(parent) {
         m_newRec = false;
+        m_serviceConnected = false;
+        m_saved = false;
     }
 
     virtual ~AutoForm() {
@@ -93,14 +98,54 @@ public slots:
             return false;
         }
 
-        if (m_newRec) {
-            emit recordAdded();
-        } else {
-            emit recordUpdated();
+        if (!m_serviceConnected)
+        {
+            connect(service(), &IService::dbError, [this](QString msg) {
+                QMessageBox::critical(this, tr("Database error"), tr(msg.toStdString().c_str()));
+                m_saved = false;
+            });
+            connect(service(), &IService::dataChanged, [this]() {
+                m_saved = true;
+            });
+            m_serviceConnected = true;
         }
 
-        return true;
+        if (m_newRec) {
+            service()->save(entity());
+            if (m_saved)
+            {
+                emit recordAdded();
+            }
+        } else {
+            service()->update(entity());
+            if (m_saved)
+            {
+                emit recordUpdated();
+            }
+        }
+
+        return m_saved;
     }
+
+private:
+    Service<T> *service() {
+        IPlugin *plugin = Context::instance().plugin(pluginId());
+        if (plugin == NULL) {
+            Q_ASSERT(false);
+            return NULL;
+        }
+
+        Service<T> *service = plugin->service<T>();
+        if (service == NULL) {
+            Q_ASSERT(false);
+            return NULL;
+        }
+
+        return service;
+    }
+
+    bool m_serviceConnected;
+    bool m_saved;
 };
 
 #endif // AUTOFORM_H

core/context.cpp

@@ -130,6 +130,11 @@ void Context::setCurrentUser(const QSharedPointer<User> &currentUser)
     m_currentUser = currentUser;
 }
 
+odb::session &Context::session()
+{
+    return m_session;
+}
+
 void Context::checkDb(const QString &path)
 {
     {

core/context.h

@@ -37,6 +37,8 @@ public:
     QSharedPointer<User> currentUser() const;
     void setCurrentUser(const QSharedPointer<User> &currentUser);
 
+    odb::session &session();
+
 private:
     Context();
     QList<IPlugin*> m_plugins;

core/formdialog.cpp

@@ -39,3 +39,9 @@ void FormDialog::accept()
         QDialog::accept();
     }
 }
+
+void FormDialog::reject()
+{
+    m_form->refresh();
+    QDialog::reject();
+}

core/formdialog.h

@@ -31,6 +31,10 @@ private slots:
     // QDialog interface
 public slots:
     void accept();
+
+    // QDialog interface
+public slots:
+    void reject() override;
 };
 
 #endif // FORMDIALOG_H

core/gridform.h

@@ -10,8 +10,8 @@
 #include "autotablemodel.h"
 #include "context.h"
 #include "iplugin.h"
-
 #include "igridform.h"
+#include "iservice.h"
 
 template<class T>
 class GridForm : public IGridForm
@@ -20,14 +20,15 @@ class GridForm : public IGridForm
 public:
     explicit GridForm(QWidget *parent = 0) :
     IGridForm(parent)
-{
-    m_form = NULL;
-    m_tableModel = NULL;
-    m_formHandler = new DefaultFormHandler();
+    {
+        m_serviceConnected = false;
+        m_tableModel = NULL;
+        m_formHandler = new DefaultFormHandler();
+
+        m_filterUi = new FilterUi(this, new T);
+        filterWidget()->layout()->addWidget(m_filterUi);
+    }
 
-    m_filterUi = new FilterUi(this, new T);
-    filterWidget()->layout()->addWidget(m_filterUi);
-}
     virtual ~GridForm()
     {
         if (m_form != NULL && m_form->parent() == NULL)
@@ -43,20 +44,26 @@ public:
         delete m_formHandler;
     }
 
-    void setForm(AutoForm<T> *form) {
+    void setForm(AutoForm<T> *aForm) {
         Q_ASSERT(m_form == NULL);
 
-        m_form = form;
+        m_form = aForm;
 
         connect(m_form, &IForm::recordAdded, [this](){
-            service()->save(m_form->entity());
-            m_tableModel->addRow(m_form->entity());
+            //service()->save(form()->entity());
+            m_tableModel->addRow(form()->entity());
             emit dataChanged();
         });
         connect(m_form, &IForm::recordUpdated, [this](){
-            service()->update(m_form->entity());
+            //service()->update(form()->entity());
             emit dataChanged();
         });
+        connect(m_form, &IForm::refreshEntity, [this](){
+            if (m_tableModel != NULL) {
+                m_tableModel->setItemToIndex(tableView()->currentIndex(),
+                                             service()->reload(m_tableModel->itemFromIndex(tableView()->currentIndex())->id()));
+            }
+        });
     }
 
     void setTableModel(AutoTableModel<T> *tableModel) {
@@ -79,6 +86,8 @@ public slots:
             return;
         }
 
+        connectService();
+
         m_tableModel->setData(service()->all());
         tableView()->setModel(m_tableModel);
 
@@ -93,7 +102,6 @@ public slots:
     }
 
 private:
-    AutoForm<T> *m_form;
     AutoTableModel<T> *m_tableModel;
     IFormHandler *m_formHandler;
 
@@ -113,6 +121,26 @@ private:
         return service;
     }
 
+    AutoForm<T> *form() {
+        return (AutoForm<T>*)m_form;
+    }
+
+    void connectService() {
+        if (!m_serviceConnected)
+        {
+            connect(service(), &IService::dbErrorRead, [this](QString msg) {
+               QMessageBox::critical(this, tr("Database error"), tr(msg.toStdString().c_str()));
+            });
+            connect(service(), &IService::dbErrorDelete, [this](QString msg) {
+               QMessageBox::critical(this, tr("Database error"), tr(msg.toStdString().c_str()));
+            });
+
+            m_serviceConnected = true;
+        }
+    }
+
+    bool m_serviceConnected;
+
     // IGridForm interface
 protected:
     void handleNewRecord() override
@@ -123,8 +151,8 @@ protected:
             return;
         }
 
-        m_form->setEntity(QSharedPointer<T>(new T()));
-        m_form->setNewRec(true);
+        form()->setEntity(QSharedPointer<T>(new T()));
+        form()->setNewRec(true);
         m_formHandler->showForm(m_form);
     }
 
@@ -136,13 +164,14 @@ protected:
             return;
         }
 
-        m_form->setEntity(m_tableModel->itemFromIndex(tableView()->currentIndex()));
-        m_form->setNewRec(false);
+        form()->setEntity(m_tableModel->itemFromIndex(tableView()->currentIndex()));
+        form()->setNewRec(false);
         m_formHandler->showForm(m_form);
     }
 
     void handleDeleteRecord() override
     {
+        connectService();
         if (m_form == NULL || m_tableModel == NULL || tableView()->currentIndex().row() < 0)
         {
             Q_ASSERT(false);

core/iform.cpp

@@ -8,3 +8,18 @@ IForm::~IForm()
 {
 }
 
+QString IForm::pluginId() const
+{
+    return m_pluginId;
+}
+
+void IForm::setPluginId(const QString &pluginId)
+{
+    m_pluginId = pluginId;
+}
+
+void IForm::refresh()
+{
+    emit refreshEntity();
+}
+

core/iform.h

@@ -2,6 +2,7 @@
 #define IFORM_H
 
 #include <QWidget>
+#include <QString>
 
 #include "core_global.h"
 
@@ -13,13 +14,21 @@ public:
     explicit IForm(QWidget *parent = 0);
     virtual ~IForm();
 
+    QString pluginId() const;
+    void setPluginId(const QString &pluginId);
+
 signals:
     void recordAdded();
     void recordUpdated();
     void validationError(const QString &errMessage);
+    void refreshEntity();
 
 public slots:
     virtual bool saveRecord() = 0;
+    void refresh();
+
+private:
+    QString m_pluginId;
 };
 
 #endif // IFORM_H

core/igridform.cpp

@@ -14,6 +14,7 @@ IGridForm::IGridForm(QWidget *parent) :
     ui->filterWidget->setVisible(false);
     m_contextMenu = new QMenu(this);
     m_contextMenu->addAction(ui->actionSelectColumns);
+    m_form = NULL;
 
     m_columnDialog = new ColumnDialog(this);
     connect(m_columnDialog, SIGNAL(accepted()), this, SLOT(columnsAccepted()));
@@ -32,6 +33,11 @@ void IGridForm::setPluginId(const QString &pluginId)
     {
         m_filterUi->setPluginId(pluginId);
     }
+
+    if (m_form != NULL)
+    {
+        m_form->setPluginId(pluginId);
+    }
 }
 
 QString IGridForm::pluginId()

core/igridform.h

@@ -60,6 +60,7 @@ private:
 
 protected:
     FilterUi *m_filterUi;
+    IForm *m_form;
 };
 
 #endif // IGRIDFORM_H

core/iservice.h

@@ -16,8 +16,13 @@ public:
 
 signals:
     void dbError(QString errMsg);
+    void dbErrorRead(QString errMsg);
+    void dbErrorInsert(QString errMsg);
+    void dbErrorUpdate(QString errMsg);
+    void dbErrorDelete(QString errMsg);
     void dataChanged();
-    void permissionDenied();
+    void updateDenied();
+    void readDenied();
 
 public slots:
 };

core/service.h

@@ -67,6 +67,7 @@ public:
         catch (const odb::exception &ex)
         {
             emit dbError(ex.what());
+            emit dbErrorUpdate(ex.what());
             return;
         }
 
@@ -88,6 +89,8 @@ public:
         catch (const odb::exception &ex)
         {
             emit dbError(ex.what());
+            emit dbErrorInsert(ex.what());
+            return;
         }
 
         emit dataChanged();
@@ -109,11 +112,21 @@ public:
         catch (const odb::exception &ex)
         {
             emit dbError(ex.what());
+            emit dbErrorRead(ex.what());
         }
 
         return entity;
     }
 
+    QSharedPointer<T> reload(int id) {
+        odb::database *db = Context::instance().db();
+
+        Q_ASSERT(db);
+
+        Context::instance().session().cache_erase<T>(*db, id);
+        return loadById(id);
+    }
+
     void erase(QSharedPointer<T> entity) {
         odb::database *db = Context::instance().db();
 
@@ -129,6 +142,7 @@ public:
         catch (const odb::exception &ex)
         {
             emit dbError(ex.what());
+            emit dbErrorDelete(ex.what());
         }
     }