fix(tune): round fractional epoch in tune data points

Signed-off-by: Radek Ježek <pc.jezek@gmail.com>

scripts/types_generator/main.py

@@ -50,6 +50,7 @@ def generate_models(schema_path: Path, output: Path, extra_template_data: Option
         target_python_version=PythonVersion.PY_39,
         base_class=ExtractorConfig.base_model_class,
         additional_imports=[
+            "warnings",
             "deprecated",
             "pydantic.field_validator",
             "pydantic.computed_field",

scripts/types_generator/schema_aliases.yaml

@@ -822,3 +822,23 @@ model_extensions:
 
   PromptModerationParameters:
     custom_base_class: ModerationParameters
+
+  TuneResultDatapointValidationLossData:
+    custom_body: |
+      @field_validator("epoch", mode="before")
+      @classmethod
+      def _validate_epoch(cls, value: Any):
+          result_value = int(value)
+          if result_value != float(value):
+              warnings.warn(f'The epoch was rounded down from {value} to {result_value}', stacklevel=4)
+          return result_value
+
+  TuneResultDatapointLossData:
+    custom_body: |
+      @field_validator("epoch", mode="before")
+      @classmethod
+      def _validate_epoch(cls, value: Any):
+          result_value = int(value)
+          if result_value != float(value):
+              warnings.warn(f'The epoch was rounded down from {value} to {result_value}', stacklevel=4)
+          return result_value

src/genai/schema/_api.py

@@ -3,11 +3,12 @@
 
 from __future__ import annotations
 
+import warnings
 from datetime import date
 from enum import Enum
 from typing import Any, Literal, Optional, Union
 
-from pydantic import AwareDatetime, Field, RootModel
+from pydantic import AwareDatetime, Field, RootModel, field_validator
 
 from genai._types import ApiBaseModel
 
@@ -2208,6 +2209,14 @@ class TuneResultDatapointLossData(ApiBaseModel):
     step: Optional[int] = None
     value: float
 
+    @field_validator("epoch", mode="before")
+    @classmethod
+    def _validate_epoch(cls, value: Any):
+        result_value = int(value)
+        if result_value != float(value):
+            warnings.warn(f"The epoch was rounded down from {value} to {result_value}", stacklevel=4)
+        return result_value
+
 
 class TuneResultDatapointValidationLoss(ApiBaseModel):
     data: TuneResultDatapointValidationLossData
@@ -2219,6 +2228,14 @@ class TuneResultDatapointValidationLossData(ApiBaseModel):
     step: Optional[int] = None
     value: float
 
+    @field_validator("epoch", mode="before")
+    @classmethod
+    def _validate_epoch(cls, value: Any):
+        result_value = int(value)
+        if result_value != float(value):
+            warnings.warn(f"The epoch was rounded down from {value} to {result_value}", stacklevel=4)
+        return result_value
+
 
 class TuneResultFiles(ApiBaseModel):
     created_at: Optional[AwareDatetime] = None