Identity overrides don't work in offline local evaluation mode

flagsmith/flagsmith.py の 117 行付近にあるオフラインハンドラーの読み込みパスと、273 行付近にある API 更新パスから開始し、ローカルファイル内で identity_overrides がどのように表現されているかを追跡します。オフラインのローカル評価で識別子 146433 に対する override が適用され、通常の feature-state の動作が維持されることを確認し、このケースのリグレッションテストカバレッジを追加または実行します。

I'm using version 3.8.0 and have identity overrides enabled for my environment.

I'm using a copy of a config for local development and initialize Flagsmith as follows:

local_file_handler = LocalFileHandler(
    environment_document_path=f"./feature_flags_configuration.local.json"
)
flagsmith = Flagsmith(
    environment_key=settings.FLAGSMITH_API_KEY,
    enable_local_evaluation=True,
    offline_handler=local_file_handler,
    offline_mode=True,
)

I have following settings on my config:

  "feature_states": [
    {
      "feature": {
        "id": 103972,
        "name": "ipqs_geo_ip",
        "type": "STANDARD"
      },
      "enabled": true,
      "django_id": 576867,
      "feature_segment": null,
      "featurestate_uuid": "04dcc7d5-b387-4668-8264-d30a2da2e111",
      "feature_state_value": null,
      "multivariate_feature_state_values": []
    }
  ],
  "identity_overrides": [
    {
      "identifier": "146433",
      "environment_api_key": ...,
      "created_date": "2024-08-26T17:45:31.959128Z",
      "identity_features": [
        {
          "feature": {
            "id": 103972,
            "name": "ipqs_geo_ip",
            "type": "STANDARD"
          },
          "enabled": false,
          "django_id": null,
          "feature_segment": null,
          "featurestate_uuid": "964dd1e9-b34a-4bf7-9984-937abbba3f0e",
          "feature_state_value": null,
          "multivariate_feature_state_values": []
        }
      ],
      "identity_traits": [],
      "identity_uuid": "8fd6de03-b834-41d2-b5ec-7076d00e6cd3",
      "django_id": null,
      "composite_key": "cfWNJQwEQkcAiKxSPFL2rv_146433"
    }
  ],

However, identity overrides are ignored unless I disable offline mode.

The root cause must be that it is updated only here when API request is made and are not loaded from offline handler here.

In production, I'm also using the local file as a fallback for the case when Flagsmith is unavailable during app start, so it might become a problem in production in rare cases.