Files
life-echo/api/alembic/versions/0018_users_language_preference.py
Kevin ccdc4e4277 feat(i18n): persist language preference and thread through chat, memoir, TTS
- Add users.language_preference (Alembic 0018, default zh); capture at signup/SMS
  only; expose on auth and profile APIs
- Lite English prompts for chat and memoir; localized stage labels and agent
  names (Life Echo / 岁月知己)
- Tencent TTS: language-aware synthesis, ModelType=1 for 501004, English chunking
- WebSocket pipeline: emit all AGENT_RESPONSE segments when TTS cancels; INFO logs
  for tts_this_turn and TTS decisions; on-demand TTS logging
- Expo: device language on auth, i18n tiers/agent name, [SPLIT] streaming UX fixes
- Tests for migration, prompts, pipeline, router tts_this_turn, reply segments

Co-authored-by: Cursor <cursoragent@cursor.com>
2026-05-11 16:16:49 +08:00

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"""userslanguage_preference 字段
Revision ID: 0018_users_language_preference
Revises: 0017_segment_narrative_defer
"""
from typing import Sequence, Union
import sqlalchemy as sa
from alembic import op
revision: str = "0018_users_language_preference"
down_revision: Union[str, None] = "0017_segment_narrative_defer"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None
def _column_names(table_name: str) -> set[str]:
bind = op.get_bind()
inspector = sa.inspect(bind)
return {column["name"] for column in inspector.get_columns(table_name)}
def upgrade() -> None:
columns = _column_names("users")
if "language_preference" not in columns:
op.add_column(
"users",
sa.Column(
"language_preference",
sa.String(length=8),
nullable=False,
server_default=sa.text("'zh'"),
),
)
def downgrade() -> None:
columns = _column_names("users")
if "language_preference" in columns:
op.drop_column("users", "language_preference")