Javascript 从数据库中获取2个计数器

我的表格中有以下文档结构：

const mongoose = require('mongoose');

const logSchema = new mongoose.Schema({
    eventName: {
        type: String,
        required: true,
        enum: ['connect', 'status', 'probability'],
    },
    timestamp: {
        type: Date,
        required: true,
    }
}, {
    timestamps: true
});

const Log = mongoose.model('Log', logSchema);

module.exports = Log;

我的意图是提取一个大小为

7

（过去7天-过去一周）的数组。每个项目都是一个JSON，有两个主要字段：开始和结束的计数器。我想计算

0方法1中的文档数
向
$sum
添加条件：

weeklyLogs = await Log.aggregate([
  { $match: { timestamp: { $gte: moment.tz('Asia/Jerusalem').subtract(6, 'days').startOf('day').toDate() } } },
  {
    $group: {
        _id: {
            $dateFromParts: {
                year: { $year: { date: "$timestamp", timezone: "Asia/Jerusalem" } },
                month: { $month: { date: "$timestamp", timezone: "Asia/Jerusalem" } },
                day: { $dayOfMonth: { date: "$timestamp", timezone: "Asia/Jerusalem" } },
                timezone: "Asia/Jerusalem"
            }
        },
        start: {
            $sum: {
                $cond: [ { $eq: ['$eventName', 'connect'] }, 1, 0]
            }
        },
        end: {
            $sum: {
                $cond: [ { $ne: ['$eventName', 'connect'] }, 1, 0]
            }
        }
    }
  }
]);

方法2
您可以使用
$facet
处理多个聚合管道，如下所示：

weeklyLogs = await Log.aggregate([
  { $match: { timestamp: { $gte: moment.tz('Asia/Jerusalem').subtract(6, 'days').startOf('day').toDate() } } },
  {
    $facet: {
        start:  [
            { $match: { eventName: 'connect' } },
            {
                $group: {
                    _id: {
                        $dateFromParts: {
                            year: { $year: { date: "$timestamp", timezone: "Asia/Jerusalem" } },
                            month: { $month: { date: "$timestamp", timezone: "Asia/Jerusalem" } },
                            day: { $dayOfMonth: { date: "$timestamp", timezone: "Asia/Jerusalem" } },
                            timezone: "Asia/Jerusalem"
                        }
                    },
                    documents: { $sum: 1 }
                }
            }
        ],
        end: [
            { $match: { eventName: { $ne: 'connect' } } },
            {
                $group: {
                    _id: {
                        $dateFromParts: {
                            year: { $year: { date: "$timestamp", timezone: "Asia/Jerusalem" } },
                            month: { $month: { date: "$timestamp", timezone: "Asia/Jerusalem" } },
                            day: { $dayOfMonth: { date: "$timestamp", timezone: "Asia/Jerusalem" } },
                            timezone: "Asia/Jerusalem"
                        }
                    },
                    documents: { $sum: 1 }
                }
            }
        ]
    }
  }
]);

现在，
\u id
字段显示在开始和结束中。有办法把它移到外面吗？所以json看起来像
{u id:…，start:…，end:…}
？编辑：NVM，第一种方法是我需要的，谢谢。检查方法1，它应该有你需要的输出
weeklyLogs = await Log.aggregate([
  { $match: { timestamp: { $gte: moment.tz('Asia/Jerusalem').subtract(6, 'days').startOf('day').toDate() } } },
  {
    $facet: {
        start:  [
            { $match: { eventName: 'connect' } },
            {
                $group: {
                    _id: {
                        $dateFromParts: {
                            year: { $year: { date: "$timestamp", timezone: "Asia/Jerusalem" } },
                            month: { $month: { date: "$timestamp", timezone: "Asia/Jerusalem" } },
                            day: { $dayOfMonth: { date: "$timestamp", timezone: "Asia/Jerusalem" } },
                            timezone: "Asia/Jerusalem"
                        }
                    },
                    documents: { $sum: 1 }
                }
            }
        ],
        end: [
            { $match: { eventName: { $ne: 'connect' } } },
            {
                $group: {
                    _id: {
                        $dateFromParts: {
                            year: { $year: { date: "$timestamp", timezone: "Asia/Jerusalem" } },
                            month: { $month: { date: "$timestamp", timezone: "Asia/Jerusalem" } },
                            day: { $dayOfMonth: { date: "$timestamp", timezone: "Asia/Jerusalem" } },
                            timezone: "Asia/Jerusalem"
                        }
                    },
                    documents: { $sum: 1 }
                }
            }
        ]
    }
  }
]);