AI 生成: 一个基于 Python Flask 的车辆管理系统，提供车辆的增删改查、搜索和统计功能。

models.py

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+# -*- coding: utf-8 -*-
+"""数据模型：使用 sqlite3 管理车辆数据"""
+
+import sqlite3
+import os
+
+DB_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'vehicles.db')
+
+
+def get_conn():
+    """获取数据库连接，返回 Row 类型便于转字典"""
+    conn = sqlite3.connect(DB_PATH)
+    conn.row_factory = sqlite3.Row
+    return conn
+
+
+def init_db():
+    """初始化数据库表"""
+    conn = get_conn()
+    conn.execute('''
+        CREATE TABLE IF NOT EXISTS vehicles (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            plate TEXT NOT NULL UNIQUE,
+            brand TEXT NOT NULL,
+            model TEXT NOT NULL,
+            year INTEGER,
+            color TEXT,
+            status TEXT DEFAULT 'available',
+            owner TEXT
+        )
+    ''')
+    conn.commit()
+    conn.close()
+
+
+def list_vehicles(keyword=None):
+    """列出车辆，可按关键字搜索"""
+    conn = get_conn()
+    if keyword:
+        like = f'%{keyword}%'
+        rows = conn.execute(
+            'SELECT * FROM vehicles WHERE plate LIKE ? OR brand LIKE ? OR model LIKE ? ORDER BY id DESC',
+            (like, like, like)
+        ).fetchall()
+    else:
+        rows = conn.execute('SELECT * FROM vehicles ORDER BY id DESC').fetchall()
+    conn.close()
+    return [dict(r) for r in rows]
+
+
+def get_vehicle(vid):
+    """获取单条车辆"""
+    conn = get_conn()
+    row = conn.execute('SELECT * FROM vehicles WHERE id = ?', (vid,)).fetchone()
+    conn.close()
+    return dict(row) if row else None
+
+
+def add_vehicle(data):
+    """新增车辆"""
+    conn = get_conn()
+    cur = conn.execute(
+        'INSERT INTO vehicles (plate, brand, model, year, color, status, owner) VALUES (?, ?, ?, ?, ?, ?, ?)',
+        (data.get('plate'), data.get('brand'), data.get('model'),
+         data.get('year'), data.get('color'),
+         data.get('status', 'available'), data.get('owner'))
+    )
+    conn.commit()
+    vid = cur.lastrowid
+    conn.close()
+    return vid
+
+
+def update_vehicle(vid, data):
+    """更新车辆"""
+    conn = get_conn()
+    conn.execute(
+        'UPDATE vehicles SET plate=?, brand=?, model=?, year=?, color=?, status=?, owner=? WHERE id=?',
+        (data.get('plate'), data.get('brand'), data.get('model'),
+         data.get('year'), data.get('color'), data.get('status'),
+         data.get('owner'), vid)
+    )
+    conn.commit()
+    conn.close()
+
+
+def delete_vehicle(vid):
+    """删除车辆"""
+    conn = get_conn()
+    conn.execute('DELETE FROM vehicles WHERE id = ?', (vid,))
+    conn.commit()
+    conn.close()
+
+
+def stats():
+    """统计信息"""
+    conn = get_conn()
+    total = conn.execute('SELECT COUNT(*) AS c FROM vehicles').fetchone()['c']
+    rows = conn.execute('SELECT status, COUNT(*) AS c FROM vehicles GROUP BY status').fetchall()
+    conn.close()
+    by_status = {r['status']: r['c'] for r in rows}
+    return {'total': total, 'by_status': by_status}