Conditionaly adding Field Validation to the Edit View in SugarCRM

record.js

({
    extendsFrom: 'RecordView',
    
    initialize: function (options) {
        this._super('initialize', [options]);

        //add validation  
        this.model.addValidationTask('note', _.bind(this.doValidateTicketNote, this));
    },

    /* add validation for note */
    doValidateTicketNote: function(fields, errors, callback) {

    	if (_.isEmpty(this.model.get('note'))) {
    			
	        errors['note'] = errors['note'] || {};
	        errors['note'].required = true;
	

    	}
        callback(null, fields, errors);    	
    },
    
})