auto-increment using loopback.js and MongoDB

Question

i want to increase mongodb document number automatically using loopback.

I made function in mongo

 function getNextSequence(name) {
   var ret = db.         


        

Answer 1

You can do something like in this example for loopback 4

let last_record = await this.testRepository.findOne({order: ['id DESC']});
if(last_record) invoice.id = last_record.id+1;

This will generate your model with the property:

@property({
    type: 'number',
    id: true,
    default: 1,
    generated: false
  })
  id: number;

Hopefully, this helps, please write me if there is any other code. Thanks