Custom record view controller, changes CSS on a given field based on number of subpanel child records linked to current record

record.js

({
	/* File: ./custom/modules/Accounts/clients/base/views/record/record.js */

	extendsFrom: 'RecordView',
	
	initialize: function(options){
		this._super('initialize', [options]);
		this.model.on('data:sync:complete', this.styleType, this);
	},

	styleType: function(){
		/* Check if related module has records linked to current record
		*  You need the "link" field name from vardefs for the specific
		*  subpanel you wish to check. 
		*
		*  This example will check the 'Calls' subpanel.
		*/
		var subpanelRecs = this.model.getRelatedCollection('calls'); 
		
		subpanelRecs.fetch({
			relate: true,
			success: function(data){
				if (data.models.length === 0)
				{
					this.$('div[data-name=account_type]').addClass('yellow');
				}
			}
		});
	},

	_dispose: function(){
		this._super('_dispose');
	}
})