通过获取moongose中的现有字段值和新字段来更新many

Question

这是我的模式

const winSchema = new mongoose.Schema( {
windo_no:Number,

time:{
start_time:  {hours: {
type: Number, min: 0, max: 23
},
minutes: {
type: Number,  min: 0, max: 59
}
},
current_time:  {hours: {
type: Number,  min: 0, max: 23
},
minutes: {
type: Number,  min: 0, max: 59
}},

end_time:  {hours: {
type: Number,  min: 0, max: 23
},
minutes: {
type: Number,  min: 0, max: 59
}},

},
date:[{
date:String ,
holiday:Boolean,
allocation:[{
tokenid:Number,
compelte:{
type: Boolean,
default: false
},
m_number:Number,
services_id:Number,
allocated_time:{hours: {
type: Number,  min: 0, max: 23
},
minutes: {
type: Number, min: 0, max: 59
}},
}]



}]
});
module.exports = mongoose.model('Window', winSchema)

我将每天运行查询，其中我想为所有窗口更新current_time将等于start_time一次尝试执行updatemany((，但如何从已插入的字段值中获取和设置值

// set current_time=starttime
router.post("/settime", async (req, res) => {

let result = await model.updateMany({ },
{
$push: {time:{ current_time: {hours:11}} },
},

)})；在这里，尽管我写了hours:11，但我想添加start_time hours字段值

let result2 =   await model.updateMany({},{
$push: 
// {'time.current_time': 'time.start_time'}
{time:{ current_time: "$start_time"} },
})

Answer 1

let result2 =   await model.updateMany({},
[{$set:{"time.current_time":"$time.start_time"}}])