get first parent pictogram if not defined

backend/project/api/serializers/observations.py

@@ -16,6 +16,7 @@
 
 
 class ObservationCategorySerializer(serializers.ModelSerializer):
+    pictogram = serializers.FileField(source="inherited_pictogram", read_only=True)
 
     class Meta:
         model = ObservationCategory

backend/project/observations/models.py

@@ -40,6 +40,14 @@
     def children(self):
         return self.get_children()
 
+    @property
+    def inherited_pictogram(self):
+        """Return parent pictogram if current pictogram is empty."""
+        if not self.pictogram:
+            parent = self.get_ancestors().filter(pictogram__isnull=False).last()
+            return parent.pictogram if parent else None
+        return self.pictogram
+
     class Meta:
         verbose_name = _("Category")
         verbose_name_plural = _("Categories")

changelog.md

@@ -1,8 +1,16 @@
 CHANGE LOG
 ==========
 
+1.0.12+dev
+----------
+
+**Improvements**
+
+- Category now return first parent pictogram available if not defined
+
+
 1.0.2    (2024-07-24)
-----------------------
+---------------------
 
 **Bugfix**
 
@@ -14,7 +22,7 @@ CHANGE LOG
 - improve UI
 
 1.0.1    (2024-07-24)
-----------------------
+---------------------
 
 **Improvements**