Moving auxiliar function and fix typo.

Author: WaVEV

django_mongodb/fields/json_field.py

@@ -18,13 +18,6 @@
 from django_mongodb.query_utils import process_lhs, process_rhs
 
 
-def _key_transform_root(self, compiler, connection):
-    previous = self.lhs
-    while isinstance(previous, KeyTransform):
-        previous = previous.lhs
-    return previous.as_mql(compiler, connection)
-
-
 def contained_by(self, compiler, connection):  # noqa: ARG001
     raise NotSupportedError("contained_by lookup is not supported on this database backend.")
 
@@ -38,7 +31,7 @@ def data_contains(self, compiler, connection):  # noqa: ARG001
 
 def from_db_value(self, value, expression, connection):
     """
-    Mongodb does not need to change the json value. It is store as it is.
+    MongoDB does not need to change the json value. It is stored as it is.
     """
     return (
         value
@@ -122,6 +115,13 @@ def key_transform_in(self, compiler, connection):
     return {"$and": [expr, type_in]}
 
 
+def _key_transform_root(self, compiler, connection):
+    previous = self.lhs
+    while isinstance(previous, KeyTransform):
+        previous = previous.lhs
+    return previous.as_mql(compiler, connection)
+
+
 def key_transform_isnull(self, compiler, connection):
     """
     The KeyTransformIsNull lookup borrows the logic from HasKey for isnull=False.