如何在mongoose中使用一个字段值来更新另一个字段值？

const schema = new mongoose.Schema({
  field1: String,
  field2: String
});

schema.pre('save', function(next) {
  this.field2 = this.field1 + ' updated';
  next();
});

const Model = mongoose.model('Model', schema);

const schema = new mongoose.Schema({
  field1: String,
  field2: String
});

schema.statics.updateField2 = function(value) {
  return this.updateMany({}, { field2: value });
};

const Model = mongoose.model('Model', schema);

Model.updateField2('new value')
  .then(() => {
    console.log('Field2 updated successfully');
  })
  .catch(err => {
    console.error('Error updating field2:', err);
  });