Javascript 删除帖子的 comments 失败

我正确地完成了控制器中的功能(正如我所认为的)，但是我无法删除 comments ，即使postman 返回响应" comments 删除成功！"

当我转到数据库时，我发现该 comments 存在于数据库中，并且没有被删除.

我想知道代码出了什么问题.这使得删除过程没有按应有的方式进行.

comment route个

router.delete("/:id/comment/:cid", protectRoute, deleteComment);

controller个

const deleteComment = async(req, res) => {
try {
    const post = await Post.findById(req.params.id);

    const comment = post.comments.find(
        (comment) => comment._id.toString() === req.params.cid.toString()
    );

    if(!comment){
        return res.status(404).json({ error: "Comment not found!" });
    }

    if(comment.userId.toString() !== req.user._id.toString()){
        return res.status(401).json({ error: "Unauthorized to delete comment" });
    }

    if (comment.userId.toString() === req.user._id.toString()) {
        post.comments = post.comments.filter(
            ({ id }) => id !== req.params.cid
        );
    }
        await post.save();
    
        return res.status(200).json({ message: "Comment deleted successfully!" });
} catch (err) {
    res.status(500).json({ error: err.message });
}

}；

my Post Model个

import mongoose from "mongoose";
const ObjectId = mongoose.Types.ObjectId;

const postSchema = mongoose.Schema({
    postedBy: {
        type: mongoose.Schema.Types.ObjectId,
        ref: 'User',
        required: true
    },
    text: {
        type: String,
        maxLength: 500
    },
    img: {
        type: String,
    },
    video: {
        type: String,
        ref: "Upload"
    },
    likes: [{
        // array of user id's
        type: mongoose.Schema.Types.ObjectId,
        ref: "User",
        default: []
    }],
    saves: [{
        // array of user id's
        type: mongoose.Schema.Types.ObjectId,
        ref: "User",
        default: []
    }],
    comments: [
        {
            id: {
                type: ObjectId,
            },
            userId: {
                type: mongoose.Schema.Types.ObjectId,
                ref: "User",
                required: true
            },
            text: {
                type: String,
                required: true
            },
            likes: [{
                // array of user id's
                type: mongoose.Schema.Types.ObjectId,
                ref: "User",
                default: []
            }],
            userProfilePic: {
                type: String,
            },
            username: {
                type: String
            },
            date: {
                type: Date,
                default: Date.now()
            },
            replies: [{
                id: {
                    type: ObjectId,
                },
                userId: {
                    type: mongoose.Schema.Types.ObjectId,
                    ref: "User",
                    required: true
                },
                text: {
                    type: String,
                    required: true
                },
                userProfilePic: {
                    type: String,
                },
                username: {
                    type: String
                },
                date: {
                    type: Date,
                    default: Date.now()
                }
            }]
        }
    ]
}, {timestamps: true}
)

const Post = mongoose.model('Post', postSchema);

export default Post;