javascript - Ember.compulated.apply() 共享 getter/setter

Question

从 Ember 1.12 开始，以下代码块生成 deprecation warning因为鼓励使用不同的 getter 和 setter 的变化。我理解这个概念，但我不确定如何重构使用 Ember.compulated.apply() 的内容，以解决这些弃用警告。

var args = this.constructor.primaryKeys.concat(function(_, setValue) {
  var keyNames = this.constructor.primaryKeys;
  if (setValue === undefined) {
    var key, value;
    for (var i = 0; i < keyNames.length; i++) {
      key   = keyNames[i];
      value = this.get(key);

      if (!Ember.isNone(value)) {
        return value;
      }
    }
  } else {
    if (this.get('primaryKey') !== setValue) {
      this.set(keyNames[0], setValue);
    }
    return setValue;
  }
});
var primaryKey = Ember.computed.apply(Ember, args);

Twiddle demonstrating the problem

Answer 1

解决方案:

    var keyNames = this.constructor.primaryKeys;
    var args = this.constructor.primaryKeys.concat({
      get: function() {
        var key, value;
        for (var i = 0; i < keyNames.length; i++) {
          key   = keyNames[i];
          value = this.get(key);

          if (!Ember.isNone(value)) {
            return value;
          }
        }
      },
      set: function(key, _, setValue) {
        if (this.get('primaryKey') !== setValue) {
          this.set(keyNames[0], setValue);
        }
        return setValue;
      }
    });
    var primaryKey = Ember.computed.apply(Ember, args);
    Ember.defineProperty(this, 'primaryKey', primaryKey);