diff --git a/nc_http/core/sqlalchemy/__init__.py b/nc_http/core/sqlalchemy/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/nc_http/core/sqlalchemy/type/__init__.py b/nc_http/core/sqlalchemy/type/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/nc_http/core/sqlalchemy/type/dot_set.py b/nc_http/core/sqlalchemy/type/dot_set.py
new file mode 100644
index 0000000..9b50b88
--- /dev/null
+++ b/nc_http/core/sqlalchemy/type/dot_set.py
@@ -0,0 +1,28 @@
+from sqlalchemy.types import TypeDecorator, String
+
+
+class InvalidDotSetException(Exception):
+    """
+    无效的 DotSet
+    """
+
+
+class DotSet(TypeDecorator):
+    impl = String
+
+    def process_bind_param(self, value, dialect):
+        if value:
+            if isinstance(value, list):
+                value = ','.join(str(i) for i in value)
+            else:
+                raise InvalidDotSetException
+            return value
+
+        return ''
+
+    def process_result_value(self, value, dialect):
+        if value:
+            value = value.split(',')
+            return value
+
+        return []
diff --git a/nc_http/core/sqlalchemy/type/json.py b/nc_http/core/sqlalchemy/type/json.py
new file mode 100644
index 0000000..9dac9db
--- /dev/null
+++ b/nc_http/core/sqlalchemy/type/json.py
@@ -0,0 +1,26 @@
+import json
+
+from sqlalchemy.types import TypeDecorator, Text
+
+
+class InvalidJsonException(Exception):
+    """
+    无效的 Json
+    """
+
+
+class Json(TypeDecorator):
+    impl = Text
+
+    def process_bind_param(self, value, dialect):
+        if value is not None:
+            if isinstance(value, (dict, list)):
+                value = json.dumps(value)
+            else:
+                raise InvalidJsonException
+        return value
+
+    def process_result_value(self, value, dialect):
+        if value is not None:
+            value = json.loads(value)
+        return value