edits

Author: timgraham

django_mongodb/expressions.py

@@ -44,6 +44,7 @@ def case(self, compiler, connection):
 
 
 def col(self, compiler, connection):  # noqa: ARG001
+    # Add the column's collection's alias for columns in joined collections.
     prefix = f"{self.alias}." if self.alias != compiler.collection_name else ""
     return f"${prefix}{self.target.column}"