Javascript MongoDB：聚合查询未在函数内传递值

你可以在没有时间的情况下取得成就.使用$toDate将日期时间字符串转换为日期

db.collection.aggregate([
  {
    $addFields: {
      "isPast": {
        $gt: [
          new Date(),
          {
            $toDate: "$endDate"
          }
        ]
      }
    }
  }
])

Sample Mongo Playground

如果您只想比较日期:

db.collection.aggregate([
  {
    $set: {
      "currentDate": "$$NOW",
      "endDate": {
        $toDate: "$endDate"
      }
    }
  },
  {
    $addFields: {
      "isPast": {
        $gt: [
          {
            "$dateFromParts": {
              "year": {
                $year: "$currentDate"
              },
              "month": {
                $month: "$currentDate"
              },
              "day": {
                "$dayOfMonth": "$currentDate"
              }
            }
          },
          {
            "$dateFromParts": {
              "year": {
                $year: "$endDate"
              },
              "month": {
                $month: "$endDate"
              },
              "day": {
                "$dayOfMonth": "$endDate"
              }
            }
          }
        ]
      }
    }
  }
])

Sample Mongo Playground (Compare date only)个