如何使用云函数从Firestore的ArrayList地图中删除对象？

const admin = require('firebase-admin');
admin.initializeApp();

exports.deleteObjectFromArrayList = async (req, res) => {
  const documentPath = 'collection/document'; // 替换为实际的文档路径
  const fieldPath = 'arrayListField'; // 替换为实际的ArrayList字段名称
  const objectId = 'objectId'; // 替换为要删除的对象的ID

  try {
    const documentSnapshot = await admin.firestore().doc(documentPath).get();
    const arrayList = documentSnapshot.get(fieldPath);

    // 查找要删除的对象的索引
    const index = arrayList.findIndex(obj => obj.id === objectId);

    if (index !== -1) {
      // 从ArrayList中删除对象
      arrayList.splice(index, 1);

      // 更新Firestore中的ArrayList地图
      await admin.firestore().doc(documentPath).update({ [fieldPath]: arrayList });
      res.status(200).send('Object deleted successfully.');
    } else {
      res.status(404).send('Object not found.');
    }
  } catch (error) {
    console.error('Error deleting object:', error);
    res.status(500).send('Internal server error.');
  }
};