Added QgsRelation::Type

python/core/auto_additions/qgsrelation.py

@@ -1,2 +1,3 @@
 # The following has been generated automatically from src/core/qgsrelation.h
+QgsRelation.RelationType.baseClass = QgsRelation
 QgsRelation.RelationStrength.baseClass = QgsRelation

python/core/auto_generated/qgsrelation.sip.in

@@ -22,6 +22,12 @@ class QgsRelation
 
   public:
 
+    enum RelationType
+    {
+      Normal,
+      Generated,
+    };
+
     enum RelationStrength
     {
       Association,
@@ -333,6 +339,13 @@ Returns the parent polymorphic relation id. If the relation is a normal relation
 %Docstring
 Returns the parent polymorphic relation. If the relation is a normal relation, an invalid polymorphic relation is returned.
 
+.. versionadded:: 3.18
+%End
+
+    RelationType type() const;
+%Docstring
+Returns the type of the relation
+
 .. versionadded:: 3.18
 %End
 

src/core/qgsrelation.cpp

@@ -435,3 +435,11 @@ QgsPolymorphicRelation QgsRelation::polymorphicRelation() const
 
   return mContext.project()->relationManager()->polymorphicRelation( d->mPolymorphicRelationId );
 }
+
+QgsRelation::RelationType QgsRelation::type() const
+{
+  if ( d->mPolymorphicRelationId.isNull() )
+    return QgsRelation::Normal;
+  else
+    return QgsRelation::Generated;
+}

src/core/qgsrelation.h

@@ -53,6 +53,16 @@ class CORE_EXPORT QgsRelation
 
   public:
 
+    /**
+     * Enum holding the relations type
+     */
+    enum RelationType
+    {
+      Normal, //! A normal relation
+      Generated, //! A generated relation is a child of a polymorphic relation
+    };
+    Q_ENUM( RelationType )
+
     /**
     * enum for the relation strength
     * Association, Composition
@@ -402,6 +412,12 @@ class CORE_EXPORT QgsRelation
      */
     QgsPolymorphicRelation polymorphicRelation() const;
 
+    /**
+     * Returns the type of the relation
+     * \since QGIS 3.18
+     */
+    RelationType type() const;
+
   private:
 
     mutable QExplicitlySharedDataPointer<QgsRelationPrivate> d;