Make sure attribute chains are evaluated safely

common/utils.py

@@ -7,3 +7,23 @@ def safe_division(numerator: int | float, denominator: int | float) -> int | flo
         return numerator / denominator
     except ZeroDivisionError:
         return 0
+    
+def safe_getattr(obj, attr_chain, default=None):
+    """
+    Safely get the nested attribute from an object.
+
+    Parameters:
+    obj (object): The object from which to retrieve the attribute.
+    attr_chain (str): The chain of attributes, separated by dots.
+    default: The default value to return if any attribute in the chain does not exist.
+
+    Returns:
+    The value of the nested attribute if it exists, otherwise the default value.
+    """
+    attrs = attr_chain.split('.')
+    for attr in attrs:
+        try:
+            obj = getattr(obj, attr)
+        except AttributeError:
+            return default
+    return obj