119 lines
3.6 KiB
Python
119 lines
3.6 KiB
Python
"""SQLite Schema 模块 (T4.1)
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定义 orders 主表与 order_status_history 审计表的 DDL，并提供幂等的
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apply_schema() 应用函数。所有表使用 IF NOT EXISTS；启用外键约束。
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"""
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from __future__ import annotations
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import sqlite3
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from pathlib import Path
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SCHEMA_SQL: str = """
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-- 订单主表
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CREATE TABLE IF NOT EXISTS orders (
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-- 主键 / 业务标识
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id TEXT PRIMARY KEY,
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source TEXT NOT NULL,
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external_id TEXT,
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service_version TEXT NOT NULL,
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amount_cents INTEGER NOT NULL CHECK(amount_cents >= 0),
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status TEXT NOT NULL CHECK(status IN
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('pending','paid','serving','delivered','completed','refunded')),
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status_updated_at TEXT NOT NULL,
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-- 客户信息（加密 + 脱敏）
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customer_name TEXT,
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customer_phone_enc TEXT,
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customer_phone_hash TEXT,
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customer_wechat TEXT,
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-- 考生信息
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candidate_name TEXT,
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candidate_id_card_enc TEXT,
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candidate_province TEXT,
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candidate_score INTEGER,
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candidate_rank INTEGER,
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candidate_subjects TEXT,
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candidate_interests TEXT,
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candidate_strong_subjects TEXT,
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candidate_weak_subjects TEXT,
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candidate_family TEXT,
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-- 服务信息
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assigned_consultant TEXT,
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plan_file TEXT,
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audit_report TEXT,
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pdf_path TEXT,
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-- 时间戳（ISO8601 UTC）
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created_at TEXT NOT NULL,
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paid_at TEXT,
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started_at TEXT,
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delivered_at TEXT,
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completed_at TEXT,
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-- 元数据
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notes TEXT,
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tags TEXT,
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upgrade_from TEXT,
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FOREIGN KEY (upgrade_from) REFERENCES orders(id) ON DELETE SET NULL
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);
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CREATE INDEX IF NOT EXISTS idx_orders_status ON orders(status);
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CREATE INDEX IF NOT EXISTS idx_orders_source ON orders(source);
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CREATE INDEX IF NOT EXISTS idx_orders_created_at ON orders(created_at);
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CREATE INDEX IF NOT EXISTS idx_orders_phone_hash ON orders(customer_phone_hash);
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CREATE UNIQUE INDEX IF NOT EXISTS uniq_orders_external
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ON orders(source, external_id) WHERE external_id IS NOT NULL;
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-- 状态历史（审计）
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CREATE TABLE IF NOT EXISTS order_status_history (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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order_id TEXT NOT NULL,
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from_status TEXT,
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to_status TEXT NOT NULL,
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actor TEXT,
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reason TEXT,
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changed_at TEXT NOT NULL,
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FOREIGN KEY (order_id) REFERENCES orders(id) ON DELETE CASCADE
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);
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CREATE INDEX IF NOT EXISTS idx_status_history_order ON order_status_history(order_id);
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"""
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def apply_schema(db_path: str | Path) -> sqlite3.Connection:
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"""应用 schema 到指定 SQLite 文件，返回连接。
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- 启用外键约束 (PRAGMA foreign_keys = ON)
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- 父目录自动创建
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- 幂等：可重复执行
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"""
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db_path = Path(db_path)
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if db_path.parent and not db_path.parent.exists():
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db_path.parent.mkdir(parents=True, exist_ok=True)
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conn = sqlite3.connect(str(db_path))
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try:
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conn.execute("PRAGMA foreign_keys = ON")
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conn.executescript(SCHEMA_SQL)
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conn.commit()
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except Exception:
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conn.close()
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raise
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return conn
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def get_schema_version(conn: sqlite3.Connection) -> int:
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"""读取当前 schema 版本号（首次运行返回 0）。后续迁移将引入 schema_version 表。"""
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try:
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row = conn.execute(
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"SELECT 1 FROM sqlite_master WHERE type='table' AND name='orders'"
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).fetchone()
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return 1 if row else 0
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except sqlite3.DatabaseError:
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return 0
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