edits.

Author: WaVEV

django_mongodb_backend/fields/json.py

@@ -163,12 +163,13 @@ def key_transform_is_null_expr(self, compiler, connection):
 
     Reference: https://code.djangoproject.com/ticket/32252
     """
+    lhs_mql = process_lhs(self, compiler, connection)
+    rhs_mql = process_rhs(self, compiler, connection)
+    # Get the root column.
     previous = self.lhs
     while isinstance(previous, KeyTransform):
         previous = previous.lhs
     root_column = previous.as_mql(compiler, connection)
-    lhs_mql = process_lhs(self, compiler, connection, as_path=False)
-    rhs_mql = process_rhs(self, compiler, connection, as_path=False)
     return _has_key_predicate(lhs_mql, root_column, negated=rhs_mql)
 
 
@@ -186,8 +187,8 @@ def key_transform_numeric_lookup_mixin_expr(self, compiler, connection):
     Return MQL to check if the field exists (i.e., is not "missing" or "null")
     and that the field matches the given numeric lookup expression.
     """
-    lhs = process_lhs(self, compiler, connection, as_path=False)
     expr = builtin_lookup_expr(self, compiler, connection)
+    lhs = process_lhs(self, compiler, connection)
     # Check if the type of lhs is not "missing" or "null".
     not_missing_or_null = {"$not": {"$in": [{"$type": lhs}, ["missing", "null"]]}}
     return {"$and": [expr, not_missing_or_null]}