120 lines
4.0 KiB
Markdown
120 lines
4.0 KiB
Markdown
# 数据库迁移说明
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## 工单处理过程记录系统迁移
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### 新增表：`work_order_process_history`
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```sql
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CREATE TABLE IF NOT EXISTS work_order_process_history (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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work_order_id INTEGER NOT NULL,
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processor_name VARCHAR(100) NOT NULL,
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processor_role VARCHAR(50),
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processor_region VARCHAR(50),
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process_content TEXT NOT NULL,
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action_type VARCHAR(50) NOT NULL,
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previous_status VARCHAR(50),
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new_status VARCHAR(50),
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assigned_module VARCHAR(50),
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process_time DATETIME NOT NULL,
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created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
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FOREIGN KEY (work_order_id) REFERENCES work_orders(id)
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);
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CREATE INDEX idx_process_history_workorder ON work_order_process_history(work_order_id);
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CREATE INDEX idx_process_history_time ON work_order_process_history(process_time);
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```
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### WorkOrder表新增字段
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如果使用SQLite，可以使用以下SQL添加字段：
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```sql
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-- 注意：SQLite不支持直接ALTER TABLE添加多个列，需要逐个添加
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ALTER TABLE work_orders ADD COLUMN assigned_module VARCHAR(50);
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ALTER TABLE work_orders ADD COLUMN module_owner VARCHAR(100);
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ALTER TABLE work_orders ADD COLUMN dispatcher VARCHAR(100);
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ALTER TABLE work_orders ADD COLUMN dispatch_time DATETIME;
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ALTER TABLE work_orders ADD COLUMN region VARCHAR(50);
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```
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### 使用Python脚本迁移（推荐）
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创建迁移脚本 `migrate_process_history.py`：
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```python
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# -*- coding: utf-8 -*-
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"""
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数据库迁移脚本：添加工单处理过程记录表和相关字段
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"""
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from src.core.database import db_manager
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from src.core.models import Base, WorkOrderProcessHistory
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from sqlalchemy import text
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def migrate_database():
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"""执行数据库迁移"""
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try:
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with db_manager.get_session() as session:
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# 创建新表
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WorkOrderProcessHistory.__table__.create(db_manager.engine, checkfirst=True)
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# 检查并添加新字段（SQLite需要特殊处理）
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try:
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# 尝试添加字段（如果已存在会报错，可以忽略）
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session.execute(text("ALTER TABLE work_orders ADD COLUMN assigned_module VARCHAR(50)"))
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except Exception as e:
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print(f"字段 assigned_module 可能已存在: {e}")
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try:
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session.execute(text("ALTER TABLE work_orders ADD COLUMN module_owner VARCHAR(100)"))
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except Exception as e:
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print(f"字段 module_owner 可能已存在: {e}")
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try:
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session.execute(text("ALTER TABLE work_orders ADD COLUMN dispatcher VARCHAR(100)"))
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except Exception as e:
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print(f"字段 dispatcher 可能已存在: {e}")
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try:
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session.execute(text("ALTER TABLE work_orders ADD COLUMN dispatch_time DATETIME"))
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except Exception as e:
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print(f"字段 dispatch_time 可能已存在: {e}")
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try:
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session.execute(text("ALTER TABLE work_orders ADD COLUMN region VARCHAR(50)"))
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except Exception as e:
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print(f"字段 region 可能已存在: {e}")
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session.commit()
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print("数据库迁移完成！")
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except Exception as e:
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print(f"数据库迁移失败: {e}")
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raise
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if __name__ == "__main__":
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migrate_database()
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```
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### 执行迁移
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运行迁移脚本：
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```bash
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python migrate_process_history.py
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```
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或者直接在Python交互式环境中执行：
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```python
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from migrate_process_history import migrate_database
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migrate_database()
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```
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## 注意事项
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1. **备份数据库**：在执行迁移前，请务必备份现有数据库
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2. **SQLite限制**：如果使用SQLite，ALTER TABLE添加列的操作在某些情况下可能失败，如果字段已存在会报错
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3. **数据迁移**：现有工单的处理过程历史记录（存储在`resolution`字段中的）不会自动迁移到新表，需要手动处理
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4. **索引优化**：新表已包含必要的索引，如果数据量大可以考虑添加更多索引
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