handle escpecial characters.

Author: WaVEV

django_mongodb_backend/expressions/builtins.py

@@ -241,8 +241,9 @@ def value(self, compiler, connection, as_path=False):  # noqa: ARG001
 
 @staticmethod
 def _is_constant_value(value):
-    if isinstance(value, Array):
-        return all(_is_constant_value(e) for e in value.get_source_expressions())
+    if isinstance(value, list | Array):
+        iterable = value.get_source_expressions() if isinstance(value, Array) else value
+        return all(_is_constant_value(e) for e in iterable)
     if isinstance(value, Value) or is_direct_value(value):
         v = value.value if isinstance(value, Value) else value
         return not isinstance(v, str) or "." not in v

django_mongodb_backend/fields/json.py

@@ -73,11 +73,11 @@ def _has_key_predicate(path, root_column=None, negated=False, as_path=False):
 
 def has_key_lookup(self, compiler, connection, as_path=False):
     """Return MQL to check for the existence of a key."""
+    as_path = as_path and self.is_simple_expression()
+    lhs = process_lhs(self, compiler, connection, as_path=as_path)
     rhs = self.rhs
-    lhs = process_lhs(self, compiler, connection)
     if not isinstance(rhs, (list, tuple)):
         rhs = [rhs]
-    as_path = as_path and self.is_simple_expression()
     paths = []
     # Transform any "raw" keys into KeyTransforms to allow consistent handling
     # in the code that follows.