diff --git a/album.cpp b/album.cpp
index d3a38f2..e1e06eb 100644
--- a/album.cpp
+++ b/album.cpp
@@ -1,10 +1,10 @@
 #include "album.hpp"
 
-Album::Album(const int year, const QString& title):Year(year), Title(title)
+Album::Album(const int year, const QString& title):Year(year), Title(title), TreeItem()
 {
 }
 
-Album::Album(const Album& other)
+Album::Album(const Album& other):TreeItem(other)
 {
   id=other.id;
   Year=other.Year;
diff --git a/artist.cpp b/artist.cpp
index 333c8b5..faa5f97 100644
--- a/artist.cpp
+++ b/artist.cpp
@@ -1,22 +1,17 @@
 #include "artist.hpp"
 #include "cd.hpp"
 
-Artist::Artist(const QString& name)
+Artist::Artist(const QString& name):TreeItem()
 {
   Name=name;
   Albums=&Children;
 }
 
-Artist::Artist(const Artist& other)
+Artist::Artist(const Artist& other):TreeItem(other)
 {
   id=other.id;
   Name=other.Name;
   Albums=&Children;
-  for(const TreeItem* item:other.Children)
-    {
-      Children.push_back(item->Copy());
-      Children.back()->Parent=this;
-    }
 }
 
 TreeItem* Artist::Copy() const
diff --git a/cd.cpp b/cd.cpp
index f87d706..f16efb0 100644
--- a/cd.cpp
+++ b/cd.cpp
@@ -7,12 +7,7 @@ CD::CD(const int year, const QString& title):Album(year,title)
 
 CD::CD(const CD& other):Album(other)
 {
-  for(const TreeItem* item:other.Children)
-    {
-      Children.push_back(item->Copy());
-      Children.back()->Parent=this;
-    }
-      Tracks=&Children;
+  Tracks=&Children;
 }
 
 TreeItem* CD::Copy() const
@@ -23,6 +18,7 @@ TreeItem* CD::Copy() const
 void CD::AddTrack(const QString& title, const int duration, const int index)
 {
   Children.push_back(new Track(Children.size()+1, title, duration));
+  Children.back()->Parent=this;
 }
 
 Album::Types CD::AlbumType() const
diff --git a/dialog.cpp b/dialog.cpp
index 596368e..208af8c 100644
--- a/dialog.cpp
+++ b/dialog.cpp
@@ -1,6 +1,9 @@
 #include "dialog.hpp"
 #include "ui_dialog.h"
 #include <QMessageBox>
+#include "artist.hpp"
+#include "cd.hpp"
+#include <QTime>
 
 Dialog::Dialog(QWidget *parent) :
     QDialog(parent),
@@ -17,29 +20,93 @@ Dialog::Dialog(QWidget *parent) :
     connect(ui->RemoveButton, SIGNAL(clicked()), this, SLOT(DelTrack()));
     connect(ui->UpButton, SIGNAL(clicked()), this, SLOT(PopTrack()));
     connect(ui->DownButton, SIGNAL(clicked()), this, SLOT(PushTrack()));
+    NewArtist=NULL;
 }
 
 Dialog::~Dialog()
 {
-    delete ui;
+  delete ui;
   delete model;
+  //delete NewArtist; //Tym zajmuje się już model
 }
 
 
 void Dialog::Check()
 {
-  if(ui->ArtistEdit->text().size()==0)
-    return;
-  if(ui->TitleEdit->text().size()==0)
-    return;
-  if(ui->YearEdit->text().size()==0)
-    return;
+  QString artistName, albumTitle;
+  int albumYear;
+
+  if(NewArtist!=NULL)
+    {
+      delete NewArtist;
+      NewArtist=NULL;
+    }
+
+  artistName=ui->ArtistEdit->text();
+  if(artistName.isEmpty())
+    {
+      QMessageBox check;
+      check.setText("There were errors in the name of the artist.\nCorrect your data and try again.");
+      check.exec();
+      return;
+    }
+  NewArtist=new Artist(artistName);
+  
+  albumTitle=ui->TitleEdit->text();
+  if(albumTitle.isEmpty())
+    {
+      QMessageBox check;
+      check.setText("There were errors in title of the album.\nCorrect your data and try again.");
+      check.exec();
+      return;
+    }
+
+  bool yearOk;
+  albumYear=ui->YearEdit->text().toInt(&yearOk);
+  if(ui->YearEdit->text().size()==0||!yearOk)
+    {
+      QMessageBox check;
+      check.setText("There were errors in year of production of the album.\nCorrect your data and try again.");
+      check.exec();
+      return;
+    }
+  Album* NewAlbum=new CD(albumYear, albumTitle);
+  NewArtist->Children.push_back(NewAlbum);
+  NewAlbum->Parent=NewArtist;
+
+
   if(model->rowCount()==0)
-    return;
+    {
+      QMessageBox check;
+      check.setText("There were errors in track list.\nCorrect your data and try again.");
+      check.exec();
+      return;
+    }
+
+  for(int trackIndex=0;trackIndex<model->rowCount();trackIndex++)
+    {
+      QString trackTitle=model->item(trackIndex,0)->text();
+
+      if(trackTitle.isEmpty())
+        {
+          QMessageBox check;
+          check.setText("There were errors in track list.\nCorrect your data and try again.");
+          check.exec();
+          return;
+        }
+      QTime duration=QTime::fromString(model->item(trackIndex,1)->text(), "m:s");
+
+      if(!duration.isValid())
+        {
+          QMessageBox check;
+          check.setText("There were errors in track list.\nCorrect your data and try again.");
+          check.exec();
+          return;
+        }
+      NewAlbum->AddTrack(trackTitle, duration.elapsed()*1000);
+
+    }
 
-  QMessageBox check;
-  check.setText("check");
-  check.exec();
   emit Ok();
 }
 
diff --git a/dialog.hpp b/dialog.hpp
index c5bf4c8..032687b 100644
--- a/dialog.hpp
+++ b/dialog.hpp
@@ -4,6 +4,8 @@
 #include <QDialog>
 #include <QStandardItemModel>
 
+#include "artist.hpp"
+
 namespace Ui {
   class Dialog;
 }
@@ -16,6 +18,7 @@ class Dialog : public QDialog
   explicit Dialog(QWidget *parent = 0);
   ~Dialog();
   QStandardItemModel *model;
+  Artist* NewArtist;
 
 public slots:
   void Check();
diff --git a/library.cpp b/library.cpp
index e122ef6..c25ce8c 100644
--- a/library.cpp
+++ b/library.cpp
@@ -1,21 +1,16 @@
 #include "library.hpp"
 
-Library::Library(std::string name)
+Library::Library(std::string name):TreeItem()
 {
   Name=name;
   Artists=&Children;
 }
 
-Library::Library(const Library& library)
+Library::Library(const Library& library):TreeItem(library)
 {
   Artists=&Children;
   id=library.id;
   Name=library.Name;
-  for(const TreeItem* item:library.Children)
-    {
-      Children.push_back(item->Copy());
-      Children.back()->Parent=this;
-    }
 }
 
 TreeItem* Library::Copy() const
@@ -32,3 +27,22 @@ TreeItem::ItemTypes Library::ItemType() const
 {
   return ItemTypes::library;
 }
+
+TreeItem* Library::AddArtist(Artist* artist)
+{
+  for(TreeItem* knownArtist:*Artists)
+    {
+      if(dynamic_cast<Artist*>(knownArtist)->Name==artist->Name)
+        {
+          knownArtist->Children.push_back(artist->Children[0]);
+          knownArtist->Children.back()->Parent=knownArtist;
+          artist->Children.pop_back();// żeby destruktor nie zniszczył mi albumu
+          delete artist;// Bo klasy wyżej nie będą wiedziały, czy skopiowaliśmy, czy dodaliśmy artystę
+          return knownArtist->Children.back();
+        }
+    }
+  //Jeśli tu doszliśmy, to jest to nowy artysta;
+  Children.push_back(artist);
+  artist->Parent=this;
+  return Children.back();
+}
diff --git a/library.hpp b/library.hpp
index aa5fc85..dbee3a4 100644
--- a/library.hpp
+++ b/library.hpp
@@ -25,6 +25,8 @@ class Library:public TreeItem
   virtual QString QData() const;
   virtual ItemTypes ItemType() const;
 
+  TreeItem* AddArtist(Artist* artist);
+
 protected:
   friend class odb::access;
 
diff --git a/main.cpp b/main.cpp
index c4892f8..e613ca9 100644
--- a/main.cpp
+++ b/main.cpp
@@ -34,9 +34,6 @@ void populate(Model& model)
   a->Albums->push_back(al);
   alb->AddTrack("Track 1", 76);
 
-  //model.Root=lib->Copy();
-  //std::cout<<*lib<<std::endl;
-    
   odb::core::transaction t (db.begin ());
   odb::schema_catalog::create_schema (db);
   lib->Persist(db);
@@ -51,8 +48,8 @@ int main(int argc, char *argv[])
 {
   QApplication a(argc, argv);
   MainWindow w;
-  create(*w.model);
-  populate(*w.model);
+  //create(*w.model);
+  //populate(*w.model);
 
   w.showMaximized();
   return a.exec();
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 68ef9b6..84efed0 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -34,15 +34,14 @@ void MainWindow::Reload()
   ui->treeView->setModel(model);
 }
 
-void MainWindow::Save()
-{
-  //model->
-}
-
 bool MainWindow::Add()
 {
   Dialog dialog(this);
-  return dialog.exec();
+  if(dialog.exec())
+      model->AddArtist(dialog.NewArtist);
+  ui->treeView->setModel(NULL);
+  ui->treeView->setModel(model);
+
 }
 
 void MainWindow::Delete()
diff --git a/mainwindow.hpp b/mainwindow.hpp
index 4d67719..402f15c 100644
--- a/mainwindow.hpp
+++ b/mainwindow.hpp
@@ -20,7 +20,6 @@ class MainWindow : public QMainWindow
   Model* model;
 public slots:
   void Reload();
-  void Save();
   bool Add();
   void Delete();
 
diff --git a/mainwindow.ui b/mainwindow.ui
index 1ad3342..78f5138 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -32,13 +32,6 @@
           </property>
          </widget>
         </item>
-        <item>
-         <widget class="QPushButton" name="SaveButton">
-          <property name="text">
-           <string>Save database</string>
-          </property>
-         </widget>
-        </item>
         <item>
          <widget class="QPushButton" name="NewButton">
           <property name="text">
diff --git a/model.cpp b/model.cpp
index 322aeee..d69d827 100644
--- a/model.cpp
+++ b/model.cpp
@@ -39,6 +39,7 @@ void Model::LoadDatabase(const QString& filename)
  //ograniczam się do jednej bazy
   Root=r.begin()->Copy();
 
+
   t.commit();
   //std::cout<<*Root<<std::endl;
 }
@@ -129,6 +130,18 @@ void Model::Erase(const QModelIndex& index)
   delete item;
 }
 
+void Model::AddArtist(Artist* artist)
+{
+  TreeItem* newNode=dynamic_cast<Library*>(Root)->AddArtist(artist);
+
+  odb::sqlite::database db(DatabaseFilename.toStdString(), SQLITE_OPEN_READWRITE|SQLITE_OPEN_CREATE);
+  odb::core::transaction t (db.begin ());
+
+  newNode->Persist(db);
+  db.update(*(newNode->Parent));
+  t.commit();
+}
+
 std::ostream& operator<<(std::ostream& out, const Model& model)
 {
   out<<*model.Root<<std::endl;
diff --git a/model.hpp b/model.hpp
index 0716a21..25aa09b 100644
--- a/model.hpp
+++ b/model.hpp
@@ -15,12 +15,6 @@
 #include "library-odb.hxx"
 #include "treeitem.hpp"
 #include "treeitem-odb.hxx"
-//#include "artist.hpp"
-//#include "artist-odb.hxx"
-//#include "album.hpp"
-//#include "album-odb.hxx"
-
-//#include "rootitem.hpp"
 
 class Model:public QAbstractItemModel
 {
@@ -38,6 +32,7 @@ class Model:public QAbstractItemModel
   int columnCount ( const QModelIndex & parent = QModelIndex() ) const;
   QVariant data ( const QModelIndex & index, int role = Qt::DisplayRole ) const;
   void Erase(const QModelIndex& index);
+  void AddArtist(Artist* artist);
 
 
   friend std::ostream& operator<<(std::ostream& out, const Model& model);
diff --git a/track.cpp b/track.cpp
index c6bbce5..feefee7 100644
--- a/track.cpp
+++ b/track.cpp
@@ -1,7 +1,7 @@
 #include "track.hpp"
 #include <QTime>
 
-Track::Track(const int number, const QString& title, const int duration):Number(number), Title(title), DurationSeconds(duration)
+Track::Track(const int number, const QString& title, const int duration):Number(number), Title(title), DurationSeconds(duration), TreeItem()
 {
   
 }
diff --git a/treeitem.cpp b/treeitem.cpp
index 80efd61..cde94b1 100644
--- a/treeitem.cpp
+++ b/treeitem.cpp
@@ -75,7 +75,16 @@ void TreeItem::Erase(odb::database& db)
 void TreeItem::Update(odb::database& db)
 {
   for(TreeItem* item:Children)
-    item->Update(db);
+    {
+      try
+        {
+          item->Update(db);
+        }
+      catch(odb::object_not_persistent e)
+        {
+          item->Persist(db);
+        }
+    }
 
   db.update(const_cast<TreeItem&>(*this));
 }
diff --git a/treeitem.hpp b/treeitem.hpp
index eb74c2b..a0c4682 100644
--- a/treeitem.hpp
+++ b/treeitem.hpp
@@ -20,6 +20,7 @@ class TreeItem
   QList<TreeItem*> Children;
   
   //Wyświetlanie w QT zależy od parenta
+#pragma db transient
   TreeItem* Parent; 
 
   TreeItem(TreeItem* parent=NULL);
diff --git a/yarl.db b/yarl.db
index 27c7fde..4219b60 100644
Binary files a/yarl.db and b/yarl.db differ