draft: rewriting downloading

music_kraken/objects/parents.py

@@ -205,6 +205,7 @@ class OuterProxy:
         if __other is None:
             return
 
+        a_id = self.id
 
         a = self
         b = __other
@@ -227,6 +228,8 @@ class OuterProxy:
         a._inner.__merge__(old_inner, **kwargs)
         del old_inner
 
+        self.id = a_id
+
     def __merge__(self, __other: Optional[OuterProxy], **kwargs):
         self.merge(__other, **kwargs)
 
@@ -337,3 +340,11 @@ class OuterProxy:
 
     def __repr__(self):
         return f"{type(self).__name__}({self.title_string})"
+
+    def get_child_collections(self):
+        for collection_string_attribute in self.DOWNWARDS_COLLECTION_STRING_ATTRIBUTES:
+            yield self.__getattribute__(collection_string_attribute)
+
+    def get_parent_collections(self):
+        for collection_string_attribute in self.UPWARDS_COLLECTION_STRING_ATTRIBUTES:
+            yield self.__getattribute__(collection_string_attribute)