225 lines
9.3 KiB
Python
225 lines
9.3 KiB
Python
"""轻量 schema 迁移。
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约定：MIGRATIONS 列表按版本号顺序排列，只增不改。每一条是一个完整的 SQL 脚本，
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执行后写入 schema_migrations 记录版本。修改 Schema 时在末尾追加新脚本，禁止删旧脚本或
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依赖运行时自动删表重建（团队约定）。
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"""
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from datetime import datetime, timezone
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import sqlite3
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from app.constants import EMBEDDING_DIM
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# 每个元素对应一个版本（下标 + 1）。vec0 建表需要本连接已加载 sqlite-vec 扩展，
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# 由 db.connect() 在调用 migrate 之前完成。
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MIGRATIONS: list[str] = [
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# v1: 笔记元数据 + Block + FTS5 全文索引 + 向量表 + 索引元信息
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f"""
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CREATE TABLE IF NOT EXISTS notes (
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note_id TEXT PRIMARY KEY,
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title TEXT NOT NULL,
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file_path TEXT NOT NULL UNIQUE,
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folder TEXT NOT NULL DEFAULT '',
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tags TEXT NOT NULL DEFAULT '[]',
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created_at TEXT NOT NULL,
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updated_at TEXT NOT NULL
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);
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CREATE TABLE IF NOT EXISTS blocks (
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block_id TEXT PRIMARY KEY,
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note_id TEXT NOT NULL REFERENCES notes(note_id) ON DELETE CASCADE,
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heading_path TEXT NOT NULL DEFAULT '[]',
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start_offset INTEGER NOT NULL,
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end_offset INTEGER NOT NULL,
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content TEXT NOT NULL,
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content_hash TEXT NOT NULL,
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token_count INTEGER NOT NULL,
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position INTEGER NOT NULL
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);
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CREATE INDEX IF NOT EXISTS idx_blocks_note ON blocks(note_id, position);
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CREATE VIRTUAL TABLE IF NOT EXISTS blocks_fts USING fts5(
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block_id UNINDEXED,
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note_id UNINDEXED,
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heading_path,
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content,
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tokenize = 'unicode61'
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);
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CREATE VIRTUAL TABLE IF NOT EXISTS vec_blocks USING vec0(
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block_id TEXT PRIMARY KEY,
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embedding float[{EMBEDDING_DIM}]
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);
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CREATE TABLE IF NOT EXISTS index_meta (
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key TEXT PRIMARY KEY,
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value TEXT NOT NULL
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);
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""",
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# v2: 第一阶段 Task Core；正文仍归 Note/Vault，任务状态持久化到 SQLite。
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"""
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CREATE TABLE IF NOT EXISTS tasks (
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task_id TEXT PRIMARY KEY,
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title TEXT NOT NULL,
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description TEXT NOT NULL DEFAULT '',
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status TEXT NOT NULL DEFAULT 'todo',
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note_id TEXT REFERENCES notes(note_id) ON DELETE SET NULL,
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due_at TEXT,
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created_at TEXT NOT NULL,
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updated_at TEXT NOT NULL
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);
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CREATE INDEX IF NOT EXISTS idx_tasks_status_due ON tasks(status, due_at);
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""",
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# v3: 第二阶段 Agent Trace；Run 与事件事实持久化，供 SSE 恢复和 Benchmark 复用。
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"""
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CREATE TABLE IF NOT EXISTS agent_runs (
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run_id TEXT PRIMARY KEY,
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status TEXT NOT NULL,
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run_json TEXT NOT NULL,
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request_json TEXT NOT NULL,
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config_snapshot_json TEXT NOT NULL DEFAULT '{}',
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created_at TEXT NOT NULL,
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updated_at TEXT NOT NULL
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);
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CREATE INDEX IF NOT EXISTS idx_agent_runs_created
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ON agent_runs(created_at DESC);
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CREATE INDEX IF NOT EXISTS idx_agent_runs_status
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ON agent_runs(status, updated_at DESC);
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CREATE TABLE IF NOT EXISTS agent_events (
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run_id TEXT NOT NULL REFERENCES agent_runs(run_id) ON DELETE CASCADE,
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sequence INTEGER NOT NULL,
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event TEXT NOT NULL,
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data_json TEXT NOT NULL DEFAULT '{}',
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timestamp TEXT NOT NULL,
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PRIMARY KEY (run_id, sequence)
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);
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CREATE INDEX IF NOT EXISTS idx_agent_events_type
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ON agent_events(run_id, event, sequence);
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""",
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# v4: durable media jobs, replayable events and revisions.
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"""
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CREATE TABLE media_jobs (
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job_id TEXT PRIMARY KEY, status TEXT NOT NULL, job_json TEXT NOT NULL,
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request_json TEXT NOT NULL, created_at TEXT NOT NULL, updated_at TEXT NOT NULL,
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idempotency_key TEXT UNIQUE, fingerprint TEXT NOT NULL
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);
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CREATE INDEX media_jobs_created ON media_jobs(created_at DESC);
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CREATE TABLE media_events (
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job_id TEXT NOT NULL REFERENCES media_jobs(job_id) ON DELETE CASCADE,
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sequence INTEGER NOT NULL, event TEXT NOT NULL, data_json TEXT NOT NULL,
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timestamp TEXT NOT NULL, PRIMARY KEY(job_id, sequence)
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);
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CREATE TABLE media_revisions (
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job_id TEXT NOT NULL REFERENCES media_jobs(job_id) ON DELETE CASCADE,
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revision INTEGER NOT NULL, job_json TEXT NOT NULL,
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PRIMARY KEY(job_id, revision)
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);
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CREATE TABLE media_notes (
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job_id TEXT NOT NULL REFERENCES media_jobs(job_id), revision INTEGER NOT NULL,
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options_hash TEXT NOT NULL, note_id TEXT NOT NULL REFERENCES notes(note_id) ON DELETE CASCADE,
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PRIMARY KEY(job_id, revision, options_hash)
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);
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""",
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# v5: application-owned search history, shared by web and desktop clients.
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"""
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CREATE TABLE IF NOT EXISTS search_history (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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query TEXT NOT NULL UNIQUE
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);
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""",
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# v6: persist each block's embedding policy for partitioned retrieval.
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"""
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ALTER TABLE blocks ADD COLUMN embedding_local_only INTEGER NOT NULL DEFAULT 0;
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""",
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# v7: application-owned chat conversations and messages, shared by web and desktop clients.
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"""
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CREATE TABLE IF NOT EXISTS chat_conversations (
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conversation_id TEXT PRIMARY KEY,
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title TEXT NOT NULL,
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created_at TEXT NOT NULL,
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updated_at TEXT NOT NULL
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);
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CREATE INDEX IF NOT EXISTS idx_chat_conversations_updated
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ON chat_conversations(updated_at DESC);
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CREATE TABLE IF NOT EXISTS chat_messages (
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message_id TEXT PRIMARY KEY,
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conversation_id TEXT NOT NULL REFERENCES chat_conversations(conversation_id) ON DELETE CASCADE,
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sequence INTEGER NOT NULL,
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role TEXT NOT NULL,
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content TEXT NOT NULL DEFAULT '',
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thinking TEXT,
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citations_json TEXT NOT NULL DEFAULT '[]',
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tool_calls_json TEXT NOT NULL DEFAULT '[]',
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usage_json TEXT,
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created_at TEXT NOT NULL,
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UNIQUE(conversation_id, sequence)
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);
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CREATE INDEX IF NOT EXISTS idx_chat_messages_conversation
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ON chat_messages(conversation_id, sequence);
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""",
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"""
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ALTER TABLE chat_messages ADD COLUMN parent_message_id TEXT;
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ALTER TABLE chat_messages ADD COLUMN activity_json TEXT NOT NULL DEFAULT '[]';
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ALTER TABLE chat_conversations ADD COLUMN active_leaf TEXT;
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UPDATE chat_messages SET parent_message_id=(SELECT prev.message_id FROM chat_messages prev
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WHERE prev.conversation_id=chat_messages.conversation_id AND prev.sequence<chat_messages.sequence ORDER BY prev.sequence DESC LIMIT 1);
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UPDATE chat_conversations SET active_leaf=(SELECT message_id FROM chat_messages WHERE conversation_id=chat_conversations.conversation_id ORDER BY sequence DESC LIMIT 1);
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CREATE INDEX idx_chat_parent ON chat_messages(conversation_id,parent_message_id);
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""",
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"""ALTER TABLE chat_conversations ADD COLUMN active_response_id TEXT;""",
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"""ALTER TABLE chat_messages ADD COLUMN workspace_context_json TEXT;""",
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"""ALTER TABLE chat_messages ADD COLUMN attachments_json TEXT NOT NULL DEFAULT '[]';""",
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]
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def _statements(script: str):
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"""Split complete SQLite statements without executescript's implicit COMMIT."""
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pending = ""
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for char in script:
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pending += char
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if char == ";" and sqlite3.complete_statement(pending):
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yield pending
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pending = ""
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if pending.strip():
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yield pending
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def migrate(conn) -> None:
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"""把尚未应用的迁移脚本按序应用到给定连接。"""
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conn.execute(
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"CREATE TABLE IF NOT EXISTS schema_migrations "
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"(version INTEGER PRIMARY KEY, applied_at TEXT NOT NULL)"
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)
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applied = {row["version"] for row in conn.execute("SELECT version FROM schema_migrations")}
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for idx, script in enumerate(MIGRATIONS, start=1):
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if idx in applied:
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continue
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conn.execute("BEGIN IMMEDIATE")
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try:
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# Another connection may have migrated while this one waited.
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if not conn.execute("SELECT 1 FROM schema_migrations WHERE version=?", (idx,)).fetchone():
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recovered_v6 = False
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if idx == 6:
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column = next((row for row in conn.execute("PRAGMA table_info(blocks)")
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if row["name"] == "embedding_local_only"), None)
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if column is not None:
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# Recover the precise partial state left by the old v6 runner.
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if column["type"].upper() != "INTEGER" or column["notnull"] != 1 or column["dflt_value"] != "0":
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raise sqlite3.DatabaseError("Unexpected embedding_local_only column schema")
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recovered_v6 = True
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if not recovered_v6:
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for statement in _statements(script):
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conn.execute(statement)
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conn.execute(
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"INSERT INTO schema_migrations (version, applied_at) VALUES (?, ?)",
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(idx, datetime.now(timezone.utc).isoformat()),
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)
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conn.execute("COMMIT")
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except BaseException:
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if conn.in_transaction:
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conn.execute("ROLLBACK")
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raise
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