Mongodb schema field validation not working in nodejs

Question

I am trying to validate the registration number. It should only be alphanumeric. I don't understand why my validate function is not working. I have attached the schema below.

const mongoose=require('mongoose');
const validator=require('validator');


const dvSchema=new mongoose.Schema({
    registrationNumber:{
        type:String,
        validate(value){
            if(!validator.isAlphanumeric(value)){
                throw new Error('Registration number should be alphanumeric.')
            }
        },
        unique:true,
        required:true,
       
    },
    vehicleType:{
        type:String,
        enum:['bike','truck'],
        default:'truck'
        
    },
    city:{
        type:String,
        required:true
    },
    activeOrdersCount:{
        type:Number,
        min:0,
        max:2,
        default:0
    }
})

module.exports=mongoose.model('deliveryVehicle',dvSchema);

Answer 1

The format of your validate field is incorrect.

See the documentation on Mongoose.JS under Custom Validators .

Change registrationNumber to the following.

registrationNumber: {
  type: String,
  validate:
    validator: function(value) {
      return validator.isAlphanumeric(value);
    },
    error: 'Registration number should be alphanumeric.'
  },
  unique:true,
  required:true,
},