round 2

models/base.py

@@ -0,0 +1,32 @@
+from dataclasses import dataclass, field
+import uuid
+import time
+
+@dataclass
+class BaseModel:
+    id: str = field(init=False)
+    created_at: float = field(init=False)
+    updated_at: float = field(init=False)
+
+    def __post_init__(self):
+        self.id = str(uuid.uuid4())
+        now = time.time()
+        self.created_at = now
+        self.updated_at = now
+
+    def touch(self):
+        self.updated_at = time.time()
+
+    def to_dict(self):
+        return {
+            'id': self.id,
+            'created_at': self.created_at,
+            'updated_at': self.updated_at
+        }
+
+    @classmethod
+    def _apply_base_fields(cls, obj, d: dict):
+        obj.id = d.get('id', obj.id)
+        obj.created_at = d.get('created_at', obj.created_at)
+        obj.updated_at = d.get('updated_at', obj.updated_at)
+        return obj