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in Technique[技术] by (71.8m points)

关于mongodb的一个问题,求大佬解答

this.articalmodel.aggregate([
    { $match: {
        _id:mongoose.Types.ObjectId(id),
        } 
    }, 
    { $lookup: 
        {
            from: "Comment", 
            localField: "_id", 
            foreignField: "artical_id",                                 as: "comment_arr"
        }
    },
    {
        $match:{
            'comment_arr.status':"0"
        }
    }
 }],(e,d)=>{
 resolve(d)
})

这个commen_arr里面还需要用statsu又进行一轮筛选,期望是只出现comment_arr查出来的status为0的数据,但是实际情况是如果我没有status=0的字段的话,整个查出来的数据都是一个空数组,请问大佬该怎么解决啊


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by (71.8m points)
等待大神解答

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