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我正在尝试从我的DocumentDB. 这是数据的结构

{
    _id: <objectidgoeshere>,
    author: {
        userId: 2,
        handleName: "VladimirPutin"
    }
    postBody: "Lorem ipsum dolor amet",
    comments: [
        {
            commentBody: "Another lorem ipsum",
            author: {
                user_id: 4,
                handleName: "JohnDoe"
            }
            replies: [
                {
                    replyBody: "Reply lorem ipsum",
                    author: {
                        user_id: 1,
                        handleName: "JaneDoe"
                    }
                }
            ]
        },
        {
            commentBody: "Another lorem ipsum 2",
            author: {
                user_id: 3,
                handleName: "MarkZucc"
            }
            replies: [
                {
                    replyBody: "Reply lorem ipsum",
                    author: {
                        user_id: 4,
                        handleName: "JohnDoe"
                    }
                }
            ]
        }
    ]
}

并假设朋友和被阻止的 id 在一个数组中

blocked_ids = [4, 5]

friend_ids = [2, 3]

我想过滤评论，这样它就不会返回被阻止的用户的评论。

我当前的代码看起来像这样

query = [
    {"$match": {"author.userId": {"$in": friend_ids}}},
    {"$project": {
        "postBody": 1,
        "comments": {
            "$filter": {
                "input": "$comments",
                "as": "comments",
                "cond": {"$nin": ["$$comments.author.user_id", blocked_ids]}
            }
        }
    }
]

不知何故，此查询返回了我朋友的帖子，但评论字段为空。我还需要过滤内部数组replies。我需要过滤掉被我屏蔽的用户的回复。

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0 回答 0