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refactor(persistence): remove UTFJSON, use engine-level json_serializer + datetime.now()

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- Replace custom UTFJSON type with standard sqlalchemy.JSON in all ORM
  models. Add json_serializer=json.dumps(ensure_ascii=False) to all
  create_async_engine calls so non-ASCII text (Chinese etc.) is stored
  as-is in both SQLite and Postgres.
- Change ORM datetime defaults from datetime.now(UTC) to datetime.now(),
  remove UTC imports.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
rayhpeng
2026-04-03 17:24:43 +08:00
parent 14c5f4b798
commit 3b4622a26f
5 changed files with 62 additions and 17 deletions
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backend/packages/harness/deerflow/persistence/models/thread_meta.py
+4 -4
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@@ -2,9 +2,9 @@
from __future__ import annotations
from datetime import UTC, datetime
from datetime import datetime
from sqlalchemy import JSON, String
from sqlalchemy import JSON, DateTime, String
from sqlalchemy.orm import Mapped, mapped_column
from deerflow.persistence.base import Base
@@ -19,5 +19,5 @@ class ThreadMetaRow(Base):
display_name: Mapped[str | None] = mapped_column(String(256))
status: Mapped[str] = mapped_column(String(20), default="idle")
metadata_json: Mapped[dict] = mapped_column(JSON, default=dict)
created_at: Mapped[datetime] = mapped_column(default=lambda: datetime.now(UTC))
updated_at: Mapped[datetime] = mapped_column(default=lambda: datetime.now(UTC), onupdate=lambda: datetime.now(UTC))
created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=lambda: datetime.now())
updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=lambda: datetime.now(), onupdate=lambda: datetime.now())