javascript - Node 不打印完整对象

Question

我被难住了..

我使用控制台中包含嵌套数组的另一个对象测试了此方法，并得到了预期的结果

db_status_emitter.on("components_found", function (returned_item) {
    //console.log(returned_item);
    prun_item.type = returned_item.type;
    prun_item.components = returned_item.components.slice(0);
    switch (prun_item.type) {

        case "one-sided-mattress":

            prun_item.quantity = prun_item.total_panel_quantity;
            var top_panel = underscore.find(prun_item.components, function (element) {
                return element.component_category == "top-panel"
            });
            var border = underscore.find(prun_item.components, function (element) {
                return element.component_category == "border"
            });
            top_panel.quantity = border.quantity = prun_item.quantity;
            top_panel.style = "91000000";
            border.style = "81000000";
            break;

        case "two-sided-mattress":

            prun_item.quantity = prun_item.total_panel_quantity / 2;
            var top_panel = underscore.find(prun_item.components, function (element) {
                return element.component_category == "top-panel"
            });
            var bottom_panel = underscore.find(prun_item.components, function (element) {
                return element.component_category == "bottom-panel"
            });
            var border = underscore.find(prun_item.components, function (element) {
                return element.component_category == "border"
            });
            top_panel.quantity = bottom_panel.quantity = border.quantity = prun_item.quantity;
            top_panel.style = "91000000";
            bottom_panel.style = "92000000";
            border.style = "81000000";
            break;

        default:
            console.error("error with prun Schedule");
            break;
    }
    console.log(prun_item);
});

//编辑:我应该在此处添加 Mongoose 调用；它与 .on() 函数处于相同的范围内... I

fex_model.findOne({_id: prun_item.model}, {components: 1, type: 1, _id: 0}, function (err, returned_item){
    if (err) db_status_emitter.emit("error", err)
    db_status_emitter.emit("components_found", returned_item);
})

为什么没有一个组件显示我给它们的添加键值对？这是输出的示例..

{ quilter_name: 'Panel Quilter #3',
schedule_no: 55f32e4470df49a65d03cf6a,
model: '3630',
size: '66',
total_panel_quantity: 72,
type: 'two-sided-mattress',
components: 
 [ { component_category: 'top-panel', buffer_op: '120' },
   { component_category: 'bottom-panel', buffer_op: '120' },
   { component_category: 'border', buffer_op: '119' } ],
quantity: 36 }

但应该是:

{ quilter_name: 'Panel Quilter #3',
schedule_no: 55f32e4470df49a65d03cf6a,
model: '3630',
size: '66',
total_panel_quantity: 72,
type: 'two-sided-mattress',
components: 
 [ { component_category: 'top-panel', buffer_op: '120', quantity: 36, style: "91000000" },
   { component_category: 'bottom-panel', buffer_op: '120', quantity: 36, style: "92000000" },
   { component_category: 'border', buffer_op: '119', quantity: 36, style: "81000000" } ],
quantity: 36 }

但是为什么同样的过程在控制台上也能工作？？？

>underscore.extend(extended_this_object, components_wrapper);
{ foo: 'bar',
  components: 
   [ { a: 'findthis', b: '3', c: '4', d: 'new value' },
     { a: 'notthis', b: '4', c: '5' } ] }
>var foundthis2 = underscore.find(extended_this_object.components, function(element){ return element.a == 'findthis'});

>foundthis2
{ a: 'findthis', b: '3', c: '4', d: 'new value' }
>foundthis2.e = 'a newer value'
'a newer value'
>extended_this_object;
{ foo: 'bar',
  components: 
   [ { a: 'findthis',
       b: '3',
       c: '4',
       d: 'new value',
       e: 'a newer value' },
     { a: 'notthis', b: '4', c: '5' } ] }

编辑这是单个组件的键的输出。我怀疑它与来自 Mongoose 的它有关...

[ '__parentArray',
  '__parent',
  '__index',
  '$__',
  'isNew',
  'errors',
  '_doc',
  '$__original_save',
  'save',
  '_pres',
  '_posts',
  'quantity',
  'style' ]

请注意，数量和样式本身就是属性，并且我怀疑记录的属性位于 _doc 中的某个位置。

Answer 1

起初我认为这是一个有趣的问题，但后来我意识到这没有意义。我尝试在 js 文件中执行各种类似的操作并对其进行 Node 处理，但我无法复制您遇到的情况。

要么日志消息不是来自console.log，要么重启服务器后无法复制这个问题(V8 一下子出了问题？)。

您是否尝试过将日志参数更改为 prun_item.components[0].quantity 之类的内容？

或者也许您的原始代码比这复杂得多，并且修改从 _.find 返回的对象不会修改您 console.log 的对象，这这是唯一合乎逻辑的解释。