Revert "[Backport ltr] Manual backport of 51456 merge feature relocat…

…ion"

python/core/auto_generated/vector/qgsvectorlayereditutils.sip.in

@@ -310,21 +310,6 @@ editing.
 :return: 2 in case vertex already exists or point does not intersect segment
 
 .. versionadded:: 3.16
-%End
-
-    bool mergeFeatures( const QgsFeatureId &targetFeatureId, const QgsFeatureIds &mergeFeatureIds, const QgsAttributes &mergeAttributes, const QgsGeometry &unionGeometry, QString &errorMessage /Out/ );
-%Docstring
-Merge features into a single one.
-
-:param targetFeatureId: id of the target feature (will be updated)
-:param mergeFeatureIds: id list of features to merge (will be deleted)
-:param mergeAttributes: are the resulting attributes in the merged feature
-:param unionGeometry: is the resulting geometry of the merged feature
-
-:return: - ``True`` if the merge was successful, or ``False`` if the operation failed.
-         - errorMessage: will be set to a descriptive error message if any occurs
-
-.. versionadded:: 3.30
 %End
 
 };

src/app/qgisapp.cpp

@@ -102,7 +102,6 @@
 #include "qgsdockablewidgethelper.h"
 #include "vertextool/qgsvertexeditor.h"
 #include "qgsvectorlayerutils.h"
-#include "qgsvectorlayereditutils.h"
 #include "qgsadvanceddigitizingdockwidget.h"
 #include "qgsabstractdatasourcewidget.h"
 #include "qgsmeshlayer.h"
@@ -9518,8 +9517,9 @@ void QgisApp::mergeSelectedFeatures()
     return;
   }
 
-  // Check at least two features are selected
-  if ( vl->selectedFeatureIds().size() < 2 )
+  //get selected feature ids (as a QSet<int> )
+  const QgsFeatureIds &featureIdSet = vl->selectedFeatureIds();
+  if ( featureIdSet.size() < 2 )
   {
     visibleMessageBar()->pushMessage(
       tr( "Not enough features selected" ),
@@ -9593,38 +9593,73 @@ void QgisApp::mergeSelectedFeatures()
       }
       return;
     }
-    else if ( !QgsWkbTypes::isMultiType( vl->wkbType() ) )
+  }
+
+  QgsAttributes attrs = d.mergedAttributes();
+  QgsAttributeMap newAttributes;
+  QString errorMessage;
+  QgsFeatureId mergeFeatureId = FID_NULL;
+  for ( int i = 0; i < attrs.count(); ++i )
+  {
+    QVariant val = attrs.at( i );
+    bool isDefaultValue = vl->fields().fieldOrigin( i ) == QgsFields::OriginProvider &&
+                          vl->dataProvider() &&
+                          vl->dataProvider()->defaultValueClause( vl->fields().fieldOriginIndex( i ) ) == val;
+    bool isPrimaryKey =  vl->fields().fieldOrigin( i ) == QgsFields::OriginProvider &&
+                         vl->dataProvider() &&
+                         vl->dataProvider()->pkAttributeIndexes().contains( vl->fields().fieldOriginIndex( i ) );
+
+    if ( isPrimaryKey && !isDefaultValue )
+      mergeFeatureId = val.toLongLong();
+
+    // convert to destination data type
+    if ( !isDefaultValue && !vl->fields().at( i ).convertCompatible( val, &errorMessage ) )
     {
-      const QgsGeometryCollection *c = qgsgeometry_cast<const QgsGeometryCollection *>( unionGeom.constGet() );
-      if ( ( c && c->partCount() > 1 ) || !unionGeom.convertToSingleType() )
-      {
-        visibleMessageBar()->pushMessage(
-          tr( "Merge failed" ),
-          tr( "Resulting geometry type (multipart) is incompatible with layer type (singlepart)." ),
-          Qgis::MessageLevel::Critical );
-        return;
-      }
+      visibleMessageBar()->pushMessage(
+        tr( "Invalid result" ),
+        tr( "Could not store value '%1' in field of type %2: %3" ).arg( attrs.at( i ).toString(), vl->fields().at( i ).typeName(), errorMessage ),
+        Qgis::MessageLevel::Warning );
     }
+    newAttributes[ i ] = val;
   }
 
-  QString errorMessage;
-  QgsVectorLayerEditUtils vectorLayerEditUtils( vl );
-  bool success = vectorLayerEditUtils.mergeFeatures( d.targetFeatureId(), vl->selectedFeatureIds(), d.mergedAttributes(), unionGeom, errorMessage );
+  vl->beginEditCommand( tr( "Merged features" ) );
 
-  if ( !success )
+  QgsFeature mergeFeature;
+  if ( mergeFeatureId == FID_NULL )
   {
-    visibleMessageBar()->pushMessage(
-      tr( "Merge failed" ),
-      errorMessage,
-      Qgis::MessageLevel::Critical );
+    // Create new feature
+    mergeFeature = QgsVectorLayerUtils::createFeature( vl, unionGeom, newAttributes );
   }
-  else if ( success && !errorMessage.isEmpty() )
+  else
   {
-    visibleMessageBar()->pushMessage(
-      tr( "Invalid result" ),
-      errorMessage,
-      Qgis::MessageLevel::Warning );
+    // Merge into existing feature
+    featureIdsAfter.remove( mergeFeatureId );
   }
+
+  // Delete other features
+  QgsFeatureIds::const_iterator feature_it = featureIdsAfter.constBegin();
+  for ( ; feature_it != featureIdsAfter.constEnd(); ++feature_it )
+  {
+    vl->deleteFeature( *feature_it );
+  }
+
+
+  if ( mergeFeatureId == FID_NULL )
+  {
+    // Add the new feature
+    vl->addFeature( mergeFeature );
+  }
+  else
+  {
+    // Modify merge feature
+    vl->changeGeometry( mergeFeatureId, unionGeom );
+    vl->changeAttributeValues( mergeFeatureId, newAttributes );
+  }
+
+  vl->endEditCommand();
+
+  vl->triggerRepaint();
 }
 
 void QgisApp::vertexTool()

src/app/qgsmergeattributesdialog.cpp

@@ -108,9 +108,6 @@ QgsMergeAttributesDialog::QgsMergeAttributesDialog( const QgsFeatureList &featur
       break;
   }
 
-  if ( ! mFeatureList.isEmpty() )
-    mTargetFeatureId = mFeatureList.first().id();
-
   connect( mSkipAllButton, &QAbstractButton::clicked, this, &QgsMergeAttributesDialog::setAllToSkip );
   connect( mTableWidget, &QTableWidget::cellChanged, this, &QgsMergeAttributesDialog::tableWidgetCellChanged );
 
@@ -468,8 +465,6 @@ void QgsMergeAttributesDialog::setAllAttributesFromFeature( QgsFeatureId feature
       currentComboBox->setCurrentIndex( currentComboBox->findData( QStringLiteral( "f%1" ).arg( FID_TO_STRING( featureId ) ) ) );
     }
   }
-
-  mTargetFeatureId = featureId;
 }
 
 QVariant QgsMergeAttributesDialog::calcStatistic( int col, QgsStatisticalSummary::Statistic stat )
@@ -671,18 +666,12 @@ void QgsMergeAttributesDialog::mRemoveFeatureFromSelectionButton_clicked()
         f_it != mFeatureList.end();
         ++f_it )
   {
-    if ( f_it->id() == mTargetFeatureId )
-      mTargetFeatureId = FID_NULL;
-
     if ( f_it->id() == featureId )
     {
       mFeatureList.erase( f_it );
       break;
     }
   }
-
-  if ( mTargetFeatureId == FID_NULL && !mFeatureList.isEmpty() )
-    mTargetFeatureId = mFeatureList.first().id();
 }
 
 void QgsMergeAttributesDialog::tableWidgetCellChanged( int row, int column )
@@ -756,11 +745,6 @@ QgsAttributes QgsMergeAttributesDialog::mergedAttributes() const
   return results;
 }
 
-QgsFeatureId QgsMergeAttributesDialog::targetFeatureId() const
-{
-  return mTargetFeatureId;
-}
-
 QSet<int> QgsMergeAttributesDialog::skippedAttributeIndexes() const
 {
   QSet<int> skipped;

src/app/qgsmergeattributesdialog.h

@@ -49,18 +49,6 @@ class APP_EXPORT QgsMergeAttributesDialog: public QDialog, private Ui::QgsMergeA
 
     QgsAttributes mergedAttributes() const;
 
-    /**
-     * Returns the id of the target feature.
-     * By default it is the first feature of the list. Otherwise the feature explicitly selected
-     * with buttons "Take attributes from selected feature" or "Take attributes from feature with
-     * the largest area".
-     *
-     * \returns The id of the target feature.
-     *
-     * \since QGIS 3.30
-     */
-    QgsFeatureId targetFeatureId() const;
-
     /**
      * Returns a list of attribute indexes which should be skipped when merging (e.g., attributes
      * which have been set to "skip"
@@ -114,7 +102,6 @@ class APP_EXPORT QgsMergeAttributesDialog: public QDialog, private Ui::QgsMergeA
     void createRubberBandForFeature( QgsFeatureId featureId );
 
     QgsFeatureList mFeatureList;
-    QgsFeatureId mTargetFeatureId = FID_NULL;
     QgsVectorLayer *mVectorLayer = nullptr;
     QgsMapCanvas *mMapCanvas = nullptr;
     //! Item that highlights the selected feature in the merge table

src/core/vector/qgsvectorlayereditutils.cpp

@@ -721,56 +721,6 @@ int QgsVectorLayerEditUtils::addTopologicalPoints( const QgsPointXY &p )
   return addTopologicalPoints( QgsPoint( p ) );
 }
 
-bool QgsVectorLayerEditUtils::mergeFeatures( const QgsFeatureId &targetFeatureId, const QgsFeatureIds &mergeFeatureIds, const QgsAttributes &mergeAttributes, const QgsGeometry &unionGeometry, QString &errorMessage )
-{
-  errorMessage.clear();
-
-  if ( mergeFeatureIds.isEmpty() )
-  {
-    errorMessage = QObject::tr( "List of features to merge is empty" );
-    return false;
-  }
-
-  QgsAttributeMap newAttributes;
-  for ( int i = 0; i < mergeAttributes.count(); ++i )
-  {
-    QVariant val = mergeAttributes.at( i );
-
-    bool isDefaultValue = mLayer->fields().fieldOrigin( i ) == QgsFields::OriginProvider &&
-                          mLayer->dataProvider() &&
-                          mLayer->dataProvider()->defaultValueClause( mLayer->fields().fieldOriginIndex( i ) ) == val;
-
-    // convert to destination data type
-    QString errorMessageConvertCompatible;
-    if ( !isDefaultValue && !mLayer->fields().at( i ).convertCompatible( val, &errorMessageConvertCompatible ) )
-    {
-      if ( errorMessage.isEmpty() )
-        errorMessage = QObject::tr( "Could not store value '%1' in field of type %2: %3" ).arg( mergeAttributes.at( i ).toString(), mLayer->fields().at( i ).typeName(), errorMessageConvertCompatible );
-    }
-    newAttributes[ i ] = val;
-  }
-
-  mLayer->beginEditCommand( QObject::tr( "Merged features" ) );
-
-  // Delete other features but the target feature
-  QgsFeatureIds::const_iterator feature_it = mergeFeatureIds.constBegin();
-  for ( ; feature_it != mergeFeatureIds.constEnd(); ++feature_it )
-  {
-    if ( *feature_it != targetFeatureId )
-      mLayer->deleteFeature( *feature_it );
-  }
-
-  // Modify merge feature
-  QgsGeometry mergeGeometry = unionGeometry;
-  mLayer->changeGeometry( targetFeatureId, mergeGeometry );
-  mLayer->changeAttributeValues( targetFeatureId, newAttributes );
-
-  mLayer->endEditCommand();
-
-  mLayer->triggerRepaint();
-
-  return true;
-}
 
 bool QgsVectorLayerEditUtils::boundingBoxFromPointList( const QgsPointSequence &list, double &xmin, double &ymin, double &xmax, double &ymax ) const
 {

src/core/vector/qgsvectorlayereditutils.h

@@ -268,20 +268,6 @@ class CORE_EXPORT QgsVectorLayerEditUtils
      */
     int addTopologicalPoints( const QgsPointSequence &ps );
 
-    /**
-     * Merge features into a single one.
-     * \param targetFeatureId id of the target feature (will be updated)
-     * \param mergeFeatureIds id list of features to merge (will be deleted)
-     * \param mergeAttributes are the resulting attributes in the merged feature
-     * \param unionGeometry is the resulting geometry of the merged feature
-     * \param errorMessage will be set to a descriptive error message if any occurs
-     *
-     * \returns TRUE if the merge was successful, or FALSE if the operation failed.
-     *
-     * \since QGIS 3.30
-     */
-    bool mergeFeatures( const QgsFeatureId &targetFeatureId, const QgsFeatureIds &mergeFeatureIds, const QgsAttributes &mergeAttributes, const QgsGeometry &unionGeometry, QString &errorMessage SIP_OUT );
-
   private:
 
     /**

tests/src/app/CMakeLists.txt

@@ -46,7 +46,6 @@ set(TESTS
   testqgsmeshcalculatordialog.cpp
   testqgsgpsinformationwidget.cpp
   testqgslabelpropertydialog.cpp
-  testqgsmergeattributesdialog.cpp
 )
 
 if (HAVE_GEOREFERENCER)