Javascript 在mongodb中使用异步/等待预保存保存地理编码器坐标

我需要在mongodb中保存坐标，有人能帮我吗

  UserScheme.pre('save', async function(next) {
                  const doc = this
                  const geo = await geocoder.geocode(this.address)
                  this.lat = geo
                 //here when I console log it shows undefined
                  console.log(this.lat)
               //but here it shows the geocoder's response 
                  console.log(geo)
   })

可能是什么？有人能帮我吗

  UserScheme.pre('save', async function(next) {
                  const doc = this
                  const geo = await geocoder.geocode(this.address)
                  this.lat = geo
                 //here when I console log it shows undefined
                  console.log(this.lat)
               //but here it shows the geocoder's response 
                  console.log(geo)
   })

这是console.logs响应

 undefined
 [
   {
     latitude: -2.4454537,
     longitude: -54.7186729,
     formattedAddress: 'Avenida Jasmin, Santarém, Microrregião de Santarém, 
     Região Geográfica Intermediária de Santarém, Pará, Região Norte, 
     68020-280, 
      Brasil',
     country: 'Brasil',
     city: 'Santarém',
     state: 'Pará',
     zipcode: '68020-280',
     streetName: 'Avenida Jasmin',
     streetNumber: undefined,
     countryCode: 'BR',
     neighbourhood: '',
     provider: 'openstreetmap'
   },
]

---

好吧，我承认有一个非常愚蠢的方法来解决这个问题，我只是在UserScheme中创建了一个数组

  const UserScheme = new mongoose.Schema({
coords:[
    

    
],
)}

然后：

 UserScheme.pre('save', async function(next) {
     const geo = await geocoder.geocode(this.address)
     console.log(geo)
     this.coords = geo
  })

好的，很容易解决