diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 6453893..e415db2 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -44,6 +44,7 @@ jobs:
           python -m pip install --upgrade pip
           pip install setuptools wheel twine
           python setup.py sdist bdist_wheel
+          cp dist/django-dysession-${{ env.STRIP_RELEASE_VERSION }}.tar.gz dist/django-dysession.tar.gz 
 
       - name: Archive wheel artifacts file
         uses: actions/upload-artifact@v3
diff --git a/README.md b/README.md
index d07a425..3e613f0 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,8 @@
 <div align="center">
 <h1>django-dysession</h1>
 <p>django-dysession is a django extension by using AWS DynamoDB as a session backend</p>
-<img src="https://socialify.git.ci/MissterHao/django-dysession/image?description=1&font=Source%20Code%20Pro&language=1&name=1&owner=1&pattern=Plus&stargazers=1&theme=Light" alt="django-dysession" width="640" height="320" />
+<img src="asset/banner.png" alt="django-dysession" width="640" height="320" />
+<!-- <img src="https://socialify.git.ci/MissterHao/django-dysession/image?description=1&font=Source%20Code%20Pro&language=1&name=1&owner=1&pattern=Plus&stargazers=1&theme=Light" alt="django-dysession" width="640" height="320" /> -->
 
 <p align="center" >
 <!-- First line -->
@@ -82,9 +83,12 @@ def mainpage(request):
     request.session["planet_have_been_to"] = ["Earth", "Jupiter", "Saturn"]
 
     return HttpResponse("Ayyy")
-
 ```
 
+Enjoy!
+
+![](asset/dynamodb-real-demo-image.png)
+
 
 ## Django Commands
 
diff --git a/asset/banner.png b/asset/banner.png
new file mode 100644
index 0000000..9c6de61
Binary files /dev/null and b/asset/banner.png differ
diff --git a/asset/dynamodb-real-demo-image.png b/asset/dynamodb-real-demo-image.png
new file mode 100644
index 0000000..7057b26
Binary files /dev/null and b/asset/dynamodb-real-demo-image.png differ
diff --git a/dysession/aws/dynamodb.py b/dysession/aws/dynamodb.py
index 20d2d66..896a959 100644
--- a/dysession/aws/dynamodb.py
+++ b/dysession/aws/dynamodb.py
@@ -147,6 +147,32 @@ def insert_session_item(
     return response
 
 
+def delete_session_item(
+    data: SessionDataModel,
+    table_name: Optional[str] = None,
+) -> bool:
+    """Delete a session key"""
+
+    assert type(data.session_key) is str, "session_key should be string type"
+
+    if table_name is None:
+        table_name = get_config()["DYNAMODB_TABLENAME"]
+
+    resource = boto3.resource("dynamodb", region_name=get_config()["DYNAMODB_REGION"])
+    table = resource.Table(table_name)
+    pk = get_config()["PARTITION_KEY_NAME"]
+
+    insert_item = {pk: data.session_key}
+    for key in data:
+        insert_item[key] = data[key]
+
+    response = table.delete_item(
+        Key={pk: data.session_key},
+    )
+
+    return response
+
+
 class DynamoDB:
     def __init__(self, client=None) -> None:
         self.client = client
@@ -206,3 +232,9 @@ def exists(self, session_key: str) -> bool:
             )
 
         return key_exists(session_key=session_key)
+
+    def delete(self, data: SessionDataModel, table_name: Optional[str] = None) -> bool:
+        try:
+            delete_session_item(data=data, table_name=table_name)
+        except AssertionError:
+            raise
diff --git a/dysession/backends/db.py b/dysession/backends/db.py
index c7bf334..8a57f46 100644
--- a/dysession/backends/db.py
+++ b/dysession/backends/db.py
@@ -9,6 +9,7 @@
 
 from dysession.aws.dynamodb import DynamoDB
 from dysession.backends.error import (
+    DeleteSessionError,
     SessionExpired,
     SessionKeyDoesNotExist,
     SessionKeyDuplicated,
@@ -120,9 +121,13 @@ def delete(self, session_key=None):
         Delete the session data under this key. If the key is None, use the
         current session key value.
         """
+        if session_key is None:
+            session_key = self._session_key
+
+        
         try:
-            self.db.delete(session_key=self._session_key)
-        except:
+            self.db.delete(self._get_session())
+        except DeleteSessionError:
             pass
 
     def load(self) -> SessionDataModel:
diff --git a/dysession/backends/error.py b/dysession/backends/error.py
index ce37bac..7f42245 100644
--- a/dysession/backends/error.py
+++ b/dysession/backends/error.py
@@ -8,3 +8,7 @@ class SessionKeyDoesNotExist(Exception):
 
 class SessionKeyDuplicated(Exception):
     ...
+
+
+class DeleteSessionError(Exception):
+    ...
diff --git a/dysession/backends/model.py b/dysession/backends/model.py
index b6176ce..261ca6f 100644
--- a/dysession/backends/model.py
+++ b/dysession/backends/model.py
@@ -1,6 +1,8 @@
 import json
 from typing import Any, Optional
 
+from dysession.settings import get_config
+
 
 class SessionDataModel:
 
@@ -11,8 +13,8 @@ def __init__(self, session_key: Optional[str] = None) -> None:
         if type(session_key) is not str and session_key is not None:
             raise TypeError("session_key should be type str or None")
 
-        self.session_key = session_key
-        self.__variables_names = set(["session_key"])
+        self.__variables_names = set([])
+        self[get_config()["PARTITION_KEY_NAME"]] = session_key
 
     def __getitem__(self, key) -> Any:
         # Set SESSION_EXPIRE_AT_BROWSER_CLOSE to False
@@ -27,10 +29,15 @@ def __getitem__(self, key) -> Any:
                 raise KeyError
             raise
 
-    def __setitem__(self, key, value):
-        # if key == "session_key":
-        #     raise ValueError()
+    def __get_session_key(self):
+        return self[get_config()["PARTITION_KEY_NAME"]]
+
+    def __set_session_key(self, value: Any):
+        self[get_config()["PARTITION_KEY_NAME"]] = value
 
+    session_key = property(__get_session_key, __set_session_key)
+
+    def __setitem__(self, key, value):
         setattr(self, key, value)
         self.__variables_names.add(key)
 
@@ -42,7 +49,7 @@ def __iter__(self):
         return iter(self.__variables_names)
 
     def __is_empty(self):
-        return "session_key" in self.__variables_names and len(self.__variables_names) == 1
+        return len(self.__variables_names) == 0
 
     is_empty = property(__is_empty)
 
diff --git a/dysession/version.txt b/dysession/version.txt
index 7f20734..e6d5cb8 100644
--- a/dysession/version.txt
+++ b/dysession/version.txt
@@ -1 +1 @@
-1.0.1
\ No newline at end of file
+1.0.2
\ No newline at end of file
diff --git a/setup.cfg b/setup.cfg
index 77ef77b..091c7e5 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -5,8 +5,8 @@ description = "django-dysession is a django extension which integrated AWS Dynam
 long_description = file: README.md
 long_description_content_type = text/markdown
 keywords = "django,session,aws,dynamodb"
-url = https://github.com/MissterHao/django-dysession/releases/download/v1.0.1/django-dysession-1.0.1.tar.gz
-download_url = https://github.com/MissterHao/django-dysession/releases/download/v1.0.1/django-dysession-1.0.1.tar.gz
+url = https://github.com/MissterHao/django-dysession/releases/latest/download/django-dysession.tar.gz
+download_url = https://github.com/MissterHao/django-dysession/releases/latest/download/django-dysession.tar.gz 
 author = "Hao-Wei, Li"
 author_email = "henryliking@gmail.com"
 maintainer = "MissterHao"
diff --git a/tests/test_aws_dynamodb.py b/tests/test_aws_dynamodb.py
index ed81d8c..742b91a 100644
--- a/tests/test_aws_dynamodb.py
+++ b/tests/test_aws_dynamodb.py
@@ -6,6 +6,7 @@
 from dysession.aws.dynamodb import (
     check_dynamodb_table_exists,
     create_dynamodb_table,
+    delete_session_item,
     destory_dynamodb_table,
     get_item,
     insert_session_item,
@@ -362,9 +363,7 @@ def test_get_item_using_not_exist_key(self):
             )
 
         with self.assertRaises(DynamodbItemNotFound):
-            resp = get_item(
-                session_key="not_exist_key", table_name=options["table"]
-            )
+            resp = get_item(session_key="not_exist_key", table_name=options["table"])
 
     # Insert Item
     @parameterized.expand(
@@ -407,9 +406,7 @@ def test_insert_item_with_tablename(self, session_key: str):
         resp = insert_session_item(data=model)
         self.assertEqual(resp["ResponseMetadata"]["HTTPStatusCode"], 200)
 
-        resp = get_item(
-            session_key=session_key, table_name=options["table"]
-        )
+        resp = get_item(session_key=session_key, table_name=options["table"])
         self.assertIsInstance(resp, SessionDataModel)
 
     @parameterized.expand(
@@ -454,3 +451,48 @@ def test_insert_item_without_tablename(self, session_key: str):
 
         resp = get_item(session_key=session_key)
         self.assertIsInstance(resp, SessionDataModel)
+
+    @parameterized.expand(
+        [
+            ["aaaaaaaaa"],
+            ["bbbbbbbbb"],
+            ["ccccccccc"],
+        ]
+    )
+    @mock_dynamodb
+    def test_delete_item_without_tablename(self, session_key: str):
+
+        options = {
+            "pk": get_config()["PARTITION_KEY_NAME"],
+            "sk": get_config()["SORT_KEY_NAME"],
+            "table": "sessions",
+            "region": "ap-northeast-1",
+        }
+
+        client = boto3.client("dynamodb", region_name=options["region"])
+        try:
+            check_dynamodb_table_exists(table_name=options["table"], client=client)
+        except DynamodbTableNotFound:
+            create_dynamodb_table(
+                options={
+                    "pk": options["pk"],
+                    "sk": options["sk"],
+                    "table": options["table"],
+                },
+                client=client,
+            )
+
+        model = SessionDataModel(session_key)
+        model["a"] = 1
+        model["b"] = 2
+        model["c"] = 3
+        model["d"] = 4
+        model["e"] = "qwerty"
+
+        resp = insert_session_item(data=model)
+        self.assertEqual(resp["ResponseMetadata"]["HTTPStatusCode"], 200)
+
+        resp = delete_session_item(data=model)
+
+        with self.assertRaises(DynamodbItemNotFound):
+            resp = get_item(session_key=session_key)
diff --git a/tests/test_backend_db.py b/tests/test_backend_db.py
index ac9ba55..8d10d03 100644
--- a/tests/test_backend_db.py
+++ b/tests/test_backend_db.py
@@ -233,3 +233,34 @@ def test_exist_check_input_type_error_via_dynamodb_controller(
 
         with self.assertRaises(TypeError):
             db.exists(error_input)
+
+    @mock_dynamodb
+    def test_delete_item_via_dynamodb_controller(self):
+
+        session_key = "test_set_duplicated_datamodel_via_dynamodb_controller"
+        self.create_dynamodb_table()
+
+        model = SessionDataModel(session_key)
+        model["a"] = 1
+        model[get_config()["TTL_ATTRIBUTE_NAME"]] = int(datetime.now().timestamp()) + 50
+
+        db = DynamoDB(self.client)
+        db.set(model, get_config()["DYNAMODB_TABLENAME"])
+        query_model = db.get(session_key=session_key)
+        self.assertEqual(model.a, query_model.a)
+
+        db.delete(model)
+
+    @mock_dynamodb
+    def test_delete_item_via_dynamodb_controller_raise_error(self):
+
+        session_key = None
+        self.create_dynamodb_table()
+
+        model = SessionDataModel(session_key)
+        model["a"] = 1
+        model[get_config()["TTL_ATTRIBUTE_NAME"]] = int(datetime.now().timestamp()) + 50
+
+        db = DynamoDB(self.client)
+        with self.assertRaises(AssertionError):
+            db.delete(model)
diff --git a/tests/test_backend_model.py b/tests/test_backend_model.py
index 5cd60f6..6c4aead 100644
--- a/tests/test_backend_model.py
+++ b/tests/test_backend_model.py
@@ -89,13 +89,13 @@ def test_get_function_default_value(self):
 
     def test_is_empty(self):
         model = SessionDataModel()
-        self.assertTrue(model.is_empty)
+        self.assertFalse(model.is_empty)
 
         model["good_key"] = 0
         self.assertFalse(model.is_empty)
 
         del model["good_key"]
-        self.assertTrue(model.is_empty)
+        self.assertFalse(model.is_empty)
 
     def test_iter(self):
         model = SessionDataModel()
@@ -105,7 +105,7 @@ def test_iter(self):
         model["c"] = 1
         model["d"] = 1
 
-        self.assertEqual(set(model), set(["a", "b", "c", "d", "session_key"]))
+        self.assertEqual(set(model), set(["a", "b", "c", "d", "PK"]))
 
     def test_items(self):
         model = SessionDataModel("session_key")
@@ -123,7 +123,7 @@ def test_items(self):
             values.append(v)
 
 
-        self.assertEqual(set(keys), set(["a", "b", "c", "d", "session_key"]))
+        self.assertEqual(set(keys), set(["a", "b", "c", "d", "PK"]))
         self.assertEqual(set(values), set([1, 2, 3, 4, "session_key"]))
 
     def test_str_magic_method(self):
@@ -137,7 +137,7 @@ def test_str_magic_method(self):
 
         data = json.loads(str(model))
 
-        for k in ["session_key", "a", "b", "c", "d"]:
+        for k in ["PK", "a", "b", "c", "d"]:
             self.assertIn(k, data.keys())
 
     def test_get__session_expiry(self):
@@ -152,4 +152,10 @@ def test_not_found_allow_list(self):
                 model[k]
 
             with self.assertRaises(KeyError):
-                self.assertIsNone(model.get(k))
\ No newline at end of file
+                self.assertIsNone(model.get(k))
+
+
+    def test_get_and_set_session_key(self):
+        model = SessionDataModel()
+        model.session_key = "key"
+        self.assertEqual(model.session_key, "key")
\ No newline at end of file