错误:在删除记录模型余烬时尝试处理事件`didSetProperty`

Question

当我在我的应用程序中删除记录时,我有一个问题,我知道发生这种情况的原因,但我无法解决问题

我在这里转载了这个案子,

我添加一个发票,然后我添加更多的交易.

我删除发票后问题就出现了,这是错误信息

未捕获错误:断言失败:错误:尝试didSetProperty在状态root.deleted.saved中处理事件.使用{name:transactionsAmounts,oldValue:NaN,originalValue:undefined,value:0}调用.

删除发票时,基本上存在错误模型{transactionsAmount}

transactionAmounts是任何单个事务的总和,并在模型中创建

  transactionsAmounts: DS.attr('string'),
  setTransactionAmount : function(){
    if(this.get("transactions.length")>0){
      this.get("transactions").then(function(transactions){
        var sum=0;
        transactions.forEach(function(transaction){
           sum+=transaction.get("total");
        });
        this.set("transactionsAmounts",sum);
      }.bind(this));
    }
  }.observes('transactions.length', 'transactions.@each.total'),

在删除发票的那一刻,不会删除transactionAmount,我怎么能发生这种情况才能删除发票模式(hasMany事务)并且没有得到错误？

Answer 1

更新:

这应该在Ember Data beta 16中修复.

原始答案:

因为在灰烬数据测试引入错误的14款删除仍然存在的集合,所以你必须让你的使用不会被删除确认的对象.这段代码为我修好了:

发票模型:

App.Invoice = DS.Model.extend({
  title         : DS.attr('string'),
  transactions  : DS.hasMany('transaction', { async:true}),
  transactionsAmounts: DS.attr('string'),
  setTransactionAmount : function(){
    if(!this.get('isDeleted') && this.get("transactions.length") > 0){
      this.get("transactions").then(function(transactions){
        var sum=0;
        transactions.forEach(function(transaction){
          if(!transaction.get('isDeleted'))
          {
            sum += transaction.get("total");
          }
        });
        if(!this.get('isDeleted'))
        {
          this.set("transactionsAmounts",sum);
        }
      }.bind(this));
    }
  }.observes('transactions.length', 'transactions.@each.total'),
});

删除控制器中的操作:

remove: function() {
      var transactions = this.get('model.transactions'),
          list = transactions.toArray();
      list.forEach(function(transaction) {
        if (!transaction.get('isDeleted'))
        {
          transaction.deleteRecord();
          transactions.removeObject();
        }
      });
      var model = this.get('model');
      if(!model.get('isDeleted'))
      {
        this.get('model').deleteRecord();
      }
      // and then go to the fatturas route
      this.transitionToRoute('fatturas');
      // set deleteMode back to false
      this.set('deleteMode', false);
    },

的jsfiddle.