minlength validator not working in mongoose

Question

I have create schema in mongoose

let userSchema = new Schema({
    name: {
        type: String,
        required: true,
        lowercase: true,
        trim: true,
        minLength: 4,
        maxLength: 15
    }
});

when I update it with this query

user.updateOne(
        { "_id" : body.id },
        { $set: {
            name:body.name,
            phone:body.phone,
            designation:body.designation,
            address:body.address
        } }
    ).then(function (updateDate) {
        var data={message:"success",data:updateDate}
        callback(data)
    }).catch(function (err) {
        var data={message:"error",data:err}
        callback(data);
    });

It does not throw any error if I update string with 2 length. There are few solutions on stackoverflow but these are not working in my case

Answer 1

Firstly, in your schema minLength must be minlength, and maxLength must be maxlength with lowercase l.

So your schema must be like this:

let userSchema = new Schema({
    name: {
        type: String,
        required: true,
        lowercase: true,
        trim: true,
        minlength: 4,
        maxlength: 15
    }
});

Secondly, you need to add {runValidators: true} option to updateOne.

Update validators are off by default - you need to specify the runValidators option.

So your code must be like this:

  user.updateOne(
    { _id: body.id },
    {
      $set: {
        name: body.name,
        phone: body.phone,
        designation: body.designation,
        address: body.address
      }
    },
    { runValidators: true }
  )
    .then(function(updateDate) {
      var data = { message: "success", data: updateDate };
      callback(data);
    })
    .catch(function(err) {
      var data = { message: "error", data: err };
      callback(data);
    });

Answer 2

You simple open mongodb Compass and then go to Validation option and change validation level to strict mode.