Move handling of not null constraint from edit form to layer

doc/api_break.dox

@@ -740,7 +740,7 @@ QgsEditorWidgetRegistry::instance()->findBest() must be used instead.
 - setExpression() has been renamed to setConstraintExpression()
 - expressionDescription() has been renamed to constraintDescription()
 - setExpressionDesctiption() has been renamed to setConstraintDescription()
-
+- notNull() and setNotNull() have been removed. Use QgsVectorLayer.setFieldConstraints()/fieldConstraints(), or QgsField.constraints() instead.
 
 QgsExpression        {#qgis_api_break_3_0_QgsExpression}
 -------------

python/core/qgseditformconfig.sip

@@ -243,15 +243,6 @@ class QgsEditFormConfig
      */
     void setContraintDescription( int idx, const QString& description );
 
-    /**
-     * Returns if the field at fieldidx should be treated as NOT NULL value
-     */
-    bool notNull( int fieldidx ) const;
-    /**
-     * Set if the field at fieldidx should be treated as NOT NULL value
-     */
-    void setNotNull( int idx, bool notnull = true );
-
     /**
      * If this returns true, the widget at the given index will receive its label on the previous line
      * while if it returns false, the widget will receive its label on the left hand side.

src/app/qgsfieldsproperties.cpp

@@ -558,12 +558,15 @@ void QgsFieldsProperties::attributeTypeDialog()
 
   attributeTypeDialog.setFieldEditable( cfg.mEditable );
   attributeTypeDialog.setLabelOnTop( cfg.mLabelOnTop );
-  attributeTypeDialog.setNotNull( cfg.mNotNull );
+  attributeTypeDialog.setNotNull( cfg.mConstraints & QgsField::ConstraintNotNull );
+  attributeTypeDialog.setUnique( cfg.mConstraints & QgsField::ConstraintUnique );
 
+  QgsField::Constraints providerConstraints = 0;
   if ( mLayer->fields().fieldOrigin( index ) == QgsFields::OriginProvider )
   {
-    attributeTypeDialog.setProviderConstraints( mLayer->dataProvider()->fieldConstraints( mLayer->fields().fieldOriginIndex( index ) ) );
+    providerConstraints = mLayer->dataProvider()->fieldConstraints( mLayer->fields().fieldOriginIndex( index ) );
   }
+  attributeTypeDialog.setProviderConstraints( providerConstraints );
 
   attributeTypeDialog.setConstraintExpression( cfg.mConstraint );
   attributeTypeDialog.setConstraintExpressionDescription( cfg.mConstraintDescription );
@@ -577,7 +580,17 @@ void QgsFieldsProperties::attributeTypeDialog()
 
   cfg.mEditable = attributeTypeDialog.fieldEditable();
   cfg.mLabelOnTop = attributeTypeDialog.labelOnTop();
-  cfg.mNotNull = attributeTypeDialog.notNull();
+
+  cfg.mConstraints = 0;
+  if ( attributeTypeDialog.notNull() && !( providerConstraints & QgsField::ConstraintNotNull ) )
+  {
+    cfg.mConstraints |= QgsField::ConstraintNotNull;
+  }
+  if ( attributeTypeDialog.unique() && !( providerConstraints & QgsField::ConstraintUnique ) )
+  {
+    cfg.mConstraints |= QgsField::ConstraintUnique;
+  }
+
   cfg.mConstraintDescription = attributeTypeDialog.constraintExpressionDescription();
   cfg.mConstraint = attributeTypeDialog.constraintExpression();
   mLayer->setDefaultValueExpression( index, attributeTypeDialog.defaultValueExpression() );
@@ -962,13 +975,14 @@ void QgsFieldsProperties::apply()
 
     editFormConfig.setReadOnly( i, !cfg.mEditable );
     editFormConfig.setLabelOnTop( i, cfg.mLabelOnTop );
-    editFormConfig.setNotNull( i, cfg.mNotNull );
     editFormConfig.setContraintDescription( i, cfg.mConstraintDescription );
     editFormConfig.setConstraintExpression( i, cfg.mConstraint );
 
     editFormConfig.setWidgetType( name, cfg.mEditorWidgetType );
     editFormConfig.setWidgetConfig( name, cfg.mEditorWidgetConfig );
 
+    mLayer->setFieldConstraints( i, cfg.mConstraints );
+
     if ( mFieldsList->item( i, attrWMSCol )->checkState() == Qt::Unchecked )
     {
       excludeAttributesWMS.insert( mFieldsList->item( i, attrNameCol )->text() );
@@ -1032,7 +1046,7 @@ QgsFieldsProperties::FieldConfig::FieldConfig()
     : mEditable( true )
     , mEditableEnabled( true )
     , mLabelOnTop( false )
-    , mNotNull( false )
+    , mConstraints( 0 )
     , mConstraintDescription( QString() )
     , mButton( nullptr )
 {
@@ -1045,7 +1059,7 @@ QgsFieldsProperties::FieldConfig::FieldConfig( QgsVectorLayer* layer, int idx )
   mEditableEnabled = layer->fields().fieldOrigin( idx ) != QgsFields::OriginJoin
                      && layer->fields().fieldOrigin( idx ) != QgsFields::OriginExpression;
   mLabelOnTop = layer->editFormConfig().labelOnTop( idx );
-  mNotNull = layer->editFormConfig().notNull( idx );
+  mConstraints = layer->fieldConstraints( idx );
   mConstraint = layer->editFormConfig().constraintExpression( idx );
   mConstraintDescription = layer->editFormConfig().constraintDescription( idx );
   const QgsEditorWidgetSetup setup = QgsEditorWidgetRegistry::instance()->findBest( layer, layer->fields().field( idx ).name() );

src/app/qgsfieldsproperties.h

@@ -122,7 +122,7 @@ class APP_EXPORT QgsFieldsProperties : public QWidget, private Ui_QgsFieldsPrope
         bool mEditable;
         bool mEditableEnabled;
         bool mLabelOnTop;
-        bool mNotNull;
+        QgsField::Constraints mConstraints;
         QString mConstraint;
         QString mConstraintDescription;
         QPushButton* mButton;

src/core/qgseditformconfig.cpp

@@ -220,14 +220,6 @@ void QgsEditFormConfig::setContraintDescription( int idx, const QString &descr )
   }
 }
 
-bool QgsEditFormConfig::notNull( int idx ) const
-{
-  if ( idx >= 0 && idx < d->mFields.count() )
-    return d->mNotNull.value( d->mFields.at( idx ).name(), false );
-  else
-    return false;
-}
-
 void QgsEditFormConfig::setReadOnly( int idx, bool readOnly )
 {
   if ( idx >= 0 && idx < d->mFields.count() )
@@ -301,15 +293,6 @@ void QgsEditFormConfig::setSuppress( QgsEditFormConfig::FeatureFormSuppress s )
   d->mSuppressForm = s;
 }
 
-void QgsEditFormConfig::setNotNull( int idx, bool notnull )
-{
-  if ( idx >= 0 && idx < d->mFields.count() )
-  {
-    d.detach();
-    d->mNotNull[ d->mFields.at( idx ).name()] = notnull;
-  }
-}
-
 void QgsEditFormConfig::readXml( const QDomNode& node )
 {
   d.detach();

src/core/qgseditformconfig.h

@@ -278,15 +278,6 @@ class CORE_EXPORT QgsEditFormConfig
      */
     void setContraintDescription( int idx, const QString& description );
 
-    /**
-     * Returns if the field at fieldidx should be treated as NOT NULL value
-     */
-    bool notNull( int fieldidx ) const;
-    /**
-     * Set if the field at fieldidx should be treated as NOT NULL value
-     */
-    void setNotNull( int idx, bool notnull = true );
-
     /**
      * If this returns true, the widget at the given index will receive its label on the previous line
      * while if it returns false, the widget will receive its label on the left hand side.

src/core/qgseditformconfig_p.h

@@ -42,7 +42,6 @@ class QgsEditFormConfigPrivate : public QSharedData
         , mConstraintsDescription( o.mConstraintsDescription )
         , mFieldEditables( o.mFieldEditables )
         , mLabelOnTop( o.mLabelOnTop )
-        , mNotNull( o.mNotNull )
         , mEditorWidgetTypes( o.mEditorWidgetTypes )
         , mWidgetConfigs( o.mWidgetConfigs )
         , mEditorLayout( o.mEditorLayout )
@@ -69,7 +68,6 @@ class QgsEditFormConfigPrivate : public QSharedData
     QMap< QString, QString> mConstraintsDescription;
     QMap< QString, bool> mFieldEditables;
     QMap< QString, bool> mLabelOnTop;
-    QMap< QString, bool> mNotNull;
 
     QMap<QString, QString> mEditorWidgetTypes;
     QMap<QString, QgsEditorWidgetConfig > mWidgetConfigs;

src/gui/editorwidgets/core/qgseditorwidgetregistry.cpp

@@ -264,6 +264,11 @@ void QgsEditorWidgetRegistry::readMapLayer( QgsMapLayer* mapLayer, const QDomEle
       formConfig.setReadOnly( idx, ewv2CfgElem.attribute( QStringLiteral( "fieldEditable" ), QStringLiteral( "1" ) ) != QLatin1String( "1" ) );
       formConfig.setLabelOnTop( idx, ewv2CfgElem.attribute( QStringLiteral( "labelOnTop" ), QStringLiteral( "0" ) ) == QLatin1String( "1" ) );
       formConfig.setNotNull( idx, ewv2CfgElem.attribute( QStringLiteral( "notNull" ), QStringLiteral( "0" ) ) == QLatin1String( "1" ) );
+      if ( ewv2CfgElem.attribute( QStringLiteral("notNull"), QStringLiteral("0") ) == QLatin1String( "1" ) )
+      {
+        // upgrade from older config
+        vectorLayer->setFieldConstraints( idx, vectorLayer->fieldConstraints( idx ) | QgsField::ConstraintNotNull );
+      }
       formConfig.setConstraintExpression( idx, ewv2CfgElem.attribute( QStringLiteral( "constraint" ), QString() ) );
       formConfig.setContraintDescription( idx, ewv2CfgElem.attribute( QStringLiteral( "constraintDescription" ), QString() ) );
 
@@ -319,7 +324,6 @@ void QgsEditorWidgetRegistry::writeMapLayer( QgsMapLayer* mapLayer, QDomElement&
       QDomElement ewv2CfgElem = doc.createElement( QStringLiteral( "widgetv2config" ) );
       ewv2CfgElem.setAttribute( QStringLiteral( "fieldEditable" ), !vectorLayer->editFormConfig().readOnly( idx ) );
       ewv2CfgElem.setAttribute( QStringLiteral( "labelOnTop" ), vectorLayer->editFormConfig().labelOnTop( idx ) );
-      ewv2CfgElem.setAttribute( QStringLiteral( "notNull" ), vectorLayer->editFormConfig().notNull( idx ) );
       ewv2CfgElem.setAttribute( QStringLiteral( "constraint" ), vectorLayer->editFormConfig().constraintExpression( idx ) );
       ewv2CfgElem.setAttribute( QStringLiteral( "constraintDescription" ), vectorLayer->editFormConfig().constraintDescription( idx ) );
 

src/gui/editorwidgets/core/qgseditorwidgetwrapper.cpp

@@ -136,7 +136,7 @@ void QgsEditorWidgetWrapper::updateConstraint( const QgsFeature &ft )
   else
     mValidConstraint = true;
 
-  if ( layer()->editFormConfig().notNull( mFieldIdx ) )
+  if ( layer()->fieldConstraints( mFieldIdx ) & QgsField::ConstraintNotNull )
   {
     if ( !expression.isEmpty() )
     {
@@ -175,4 +175,4 @@ bool QgsEditorWidgetWrapper::isInTable( const QWidget* parent )
   if ( !parent ) return false;
   if ( qobject_cast<const QTableView*>( parent ) ) return true;
   return isInTable( parent->parentWidget() );
-}
+}

src/gui/qgsattributeform.cpp

@@ -674,7 +674,7 @@ void QgsAttributeForm::onAttributeChanged( const QVariant& value )
       break;
   }
 
-  if ( eww->layer()->editFormConfig().notNull( eww->fieldIdx() ) )
+  if ( eww->layer()->fieldConstraints( eww->fieldIdx() ) & QgsField::ConstraintNotNull )
   {
     QLabel* buddy = mBuddyMap.value( eww->widget() );