Add created_at to our models

libs/core/kiln_ai/datamodel/basemodel.py

@@ -3,6 +3,7 @@
 import uuid
 from abc import ABCMeta, abstractmethod
 from builtins import classmethod
+from datetime import datetime
 from pathlib import Path
 from typing import Optional, Self, Type, TypeVar
 
@@ -30,6 +31,7 @@ class KilnBaseModel(BaseModel):
 
     v: int = 1  # schema_version
     path: Optional[Path] = Field(default=None, exclude=True)
+    created_at: datetime = Field(default_factory=datetime.now)
 
     @computed_field()
     def model_type(self) -> str:

libs/core/kiln_ai/datamodel/test_basemodel.py

@@ -1,3 +1,4 @@
+import datetime
 import json
 from pathlib import Path
 from typing import Optional
@@ -72,6 +73,14 @@ def test_type_name():
     assert model.model_type == "kiln_base_model"
 
 
+def test_created_at():
+    model = KilnBaseModel()
+    assert model.created_at is not None
+    # Check it's within 2 seconds of now
+    now = datetime.datetime.now()
+    assert abs((model.created_at - now).total_seconds()) < 2
+
+
 # Instance of the parented model for abstract methods
 class NamedParentedModel(KilnParentedModel):
     @classmethod