add relationship v2

Author: MacHu-GWU

pynamodb_mate/models.py

@@ -131,7 +131,7 @@ def get_one_or_none(
         range_key: T.Optional[T.Any] = None,
         consistent_read: bool = False,
         attributes_to_get: T.Optional[T.Sequence[str]] = None,
-    ) -> T.Optional["Model"]:
+    ) -> T.Optional["T_MODEL"]:
         """
         Get one Dynamodb item object or None if not exists.
 

pynamodb_mate/patterns/api.py

@@ -3,4 +3,5 @@
 from .cache import api as cache
 from .large_attribute import api as large_attribute
 from .relationship import api as relationship
+from .relationship_v2 import api as relationship_v2
 from .status_tracker import api as status_tracker

pynamodb_mate/patterns/relationship_v2/__init__.py

@@ -0,0 +1,8 @@
+# -*- coding: utf-8 -*-
+
+"""
+This Python module streamlines the creation of well-structured one-to-many and
+many-to-many relationship data models for Amazon DynamoDB. With its intuitive design,
+developers can swiftly implement business operations in code,
+enabling efficient development of DynamoDB-backed applications.
+"""

pynamodb_mate/patterns/relationship_v2/api.py

@@ -0,0 +1,11 @@
+# -*- coding: utf-8 -*-
+
+from .impl import BaseLookupIndex
+from .impl import BaseEntity
+from .impl import T_BASE_ENTITY
+from .impl import ROOT
+from .impl import ItemType
+from .impl import EntityType
+from .impl import RelationshipType
+from .impl import OneToManyRelationshipType
+from .impl import ManyToManyRelationshipType