计算属性未更新

Question

问题:当控制器修改"pages"数组时,计算属性"tnop"不会更新,如下所示:

相关书籍型号代码:

sections: []
tnop: function() 
{
var n = 0;
var sections = this.get('sections');
if (!sections)
  return n;

for (var i=0; i < sections.length; i++) {
  n += sections[i].pages.length;
}
return n;
}.property('sections.@each.pages.length')

---

相关控制器代码:

var sections = EM.model.getPath('book.sections');
var aps = EM.model.getPath("ps");
$.each(sections, function(si, section) {
  var bp = [];
  if (json && json.ia) {
    bp = section.get("pages");
    var ns = aps[json.ssi];

      var lp = ns.get("lp");
      var rp = ns.get("rp");
    if (rp) {
      bp.insertAt(lp.number-1, rp);
      bp[lp.number-1] = rp;
    }
    if (lp) {
      bp.insertAt(lp.number-1, lp);
      bp[lp.number-1] = lp;
    }
  }
});

---

Answer 1

就目前而言,您无法直接观察@each的深层嵌套路径.相反,您必须使用嵌套的@each代理,如下所示:

物业( '的部分.@ each.pages.@ each.length')