custom validation with array in loopback

Question

Does anyone know how to do custom validation on array of sub model in loopback.js?

"properties": {
"rows": {
  "type": [
    "sub-model"
  ],
  "required": true
 }
}

Answer 1

In model.js you need to add below :

function rowsValidation(err){
  if(!this.rows){
    err();
  }
}

Model.validate('rows', rowsValidation, {message: 'Rows is not valid'});