Added tools to store lists as json

server/app/tools/models.py

@@ -0,0 +1,16 @@
+from sqlalchemy import JSON, TypeDecorator
+from sqlalchemy.dialects.sqlite import JSON
+
+from json import dumps, loads
+
+
+class JsonString(TypeDecorator):
+    """Enables JSON storage by encoding and decoding on the fly."""
+
+    impl = JSON
+
+    def process_bind_param(self, value, dialect):
+        return dumps(value)
+
+    def process_result_value(self, value, dialect):
+        return loads(value)