// 清理 vehicle-types 集合中所有 pricePerDay 字段
const mongoose = require('mongoose');

mongoose.connect(process.env.MONGODB_URI || 'mongodb://localhost:27017/e-scooter-rental')
  .then(async () => {
    const db = mongoose.connection.db;
    const result = await db.collection('vehicle-types').updateMany(
      { pricePerDay: { $exists: true } },
      { $unset: { pricePerDay: "" } }
    );
    console.log(`已从 ${result.modifiedCount} 条 vehicle-types 文档中删除 pricePerDay 字段`);
    await mongoose.disconnect();
    process.exit(0);
  })
  .catch(err => {
    console.error('执行失败:', err);
    process.exit(1);
  });