浅念
e8c77412fa
- message_fts 外部内容虚拟表+trigram分词(中文子串可MATCH,无需分词库) - 3个触发器随ORM upsert自动同步索引(抓取器零改动) - 搜索路由:≥3字走FTS MATCH,<3字/MySQL回退LIKE - 实测:搜「大众途安」56条,LIKE全扫3.95s→FTS 0.003s;索引+300MB - 7个新测试(建表幂等/触发器同步/中文匹配/短查询回退/未建索引回退),426绿 Co-Authored-By: Claude <noreply@anthropic.com>
84 lines
3.0 KiB
Python
84 lines
3.0 KiB
Python
"""Tests for the FTS5 message-search index (app.db.fts).
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SQLite FTS5 trigram tokenizer gives Chinese substring matching at index
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speed instead of a 4s LIKE scan over 675k rows (2026-08-21). The module:
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* ``ensure_fts`` creates the ``message_fts`` virtual table + sync triggers
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(idempotent; no-op when already present, tolerant of MySQL where FTS5
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doesn't exist — callers fall back to LIKE).
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* ORM inserts/updates keep the index in sync via the triggers.
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* ``fts_available`` reports whether the index exists on this engine.
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"""
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from __future__ import annotations
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import pytest
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import sqlalchemy as sa
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from app.db.base import Base
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from app.db.fts import ensure_fts, fts_available, fts_match_rows
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from app.db.models import Message
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@pytest.fixture
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async def engine():
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from sqlalchemy.ext.asyncio import create_async_engine
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eng = create_async_engine("sqlite+aiosqlite:///:memory:")
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async with eng.begin() as conn:
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await conn.run_sync(Base.metadata.create_all)
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try:
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yield eng
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finally:
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await eng.dispose()
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async def test_ensure_fts_creates_index_and_triggers(engine):
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async with engine.begin() as conn:
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await ensure_fts(conn)
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assert await fts_available(engine) is True
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async def test_ensure_fts_idempotent(engine):
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async with engine.begin() as conn:
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await ensure_fts(conn)
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await ensure_fts(conn) # 二次调用不报错
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assert await fts_available(engine) is True
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async def test_orm_insert_syncs_fts(engine):
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"""ORM 插入消息 → 触发器自动进 FTS 索引 → 能 MATCH 到。"""
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from sqlalchemy.ext.asyncio import async_sessionmaker
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async with engine.begin() as conn:
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await ensure_fts(conn)
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maker = async_sessionmaker(engine, expire_on_commit=False)
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async with maker() as session:
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session.add(Message(msg_id="m1", channel="wechat", owner_account_id="o", talker_id="t", text="24年大众途安 简约白", timestamp=1000))
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session.add(Message(msg_id="m2", channel="wechat", owner_account_id="o", talker_id="t", text="丰田汉兰达", timestamp=2000))
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await session.commit()
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rows = await fts_match_rows(engine, "大众途安")
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assert [r.msg_id for r in rows] == ["m1"]
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async def test_fts_match_chinese_substring(engine):
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"""trigram 中文子串匹配:搜「途安」(2字,LIKE 回退)与「大众途安」(4字,FTS)。"""
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from sqlalchemy.ext.asyncio import async_sessionmaker
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async with engine.begin() as conn:
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await ensure_fts(conn)
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maker = async_sessionmaker(engine, expire_on_commit=False)
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async with maker() as session:
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session.add(Message(msg_id="m1", channel="wechat", owner_account_id="o", talker_id="t", text="推荐24年大众途安L", timestamp=1000))
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await session.commit()
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rows = await fts_match_rows(engine, "大众途安")
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assert len(rows) == 1
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async def test_fts_absent_on_fresh_db(engine):
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"""未 ensure 过的库 → fts_available False(搜索走 LIKE 回退)。"""
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assert await fts_available(engine) is False
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