That's because ultimately the references depend on the execution of the FieldtypePage::findReferences() method. This method has to be called for each page you want to get or count the references to. And so the number of references is not a simple value in the database that you can query in a $pages->find() selector the way a field value is. Enabling selectors that query or sort by the number of references is one of the motivations behind the Connect Page Fields module. If you use this mo
    • Like