Question

我正在尝试获取，操作和保存猫鼬文档，但得到错误的结果。请参见下面的代码段：

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
    <title>Ofensas</title>

    <!-- Bootstrap -->
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"  rel="stylesheet">

    <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
    <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
    <!--[if lt IE 9]>
      <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
      <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
    <![endif]-->
  </head>
  <body>
    <p><br/><br></p>
	<div class="container">
		<table class="table table-bordered table-striped table-hover">
			<thead>
			<tr>
				<th>Descrição</th>
				<th>Número</th>
				<th>ID</th>
			</tr>
			</thead>
		</table>
	
	</div>
	

    <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
    <!-- Include all compiled plugins (below), or include individual files as needed -->
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" ></script>
	<script>
	$.getJSON("exemplo.json",function(data){
		var items = [];
		$.each(data, function(key, val){
			items.push("<tr>");
			items.push("<td name='" + key + "'>" + val.offense_name +"</td>");
			items.push("<td nuemro='" + key + "'>" + val.count + "</td>");
			items.push("<td name='" + key + "'>" + val.offense_id + "</td>");
			items.push("</tr>");
		
		
		});
		$("<tbody/>", {html: items.join("")}).appendTo("table");
	
	});
	
	</script>
  </body>
</html>

每次我遍历x = [{id:"abc", value:10, name:"andy"}, {id:"abc", value:20, name:"mark"}]; x.forEach(function(x){ var amount = x.value; y.findOne({id:x.id}).populate("name").exec(function(err, y){ y.value += amount; y.save(); }); });并尝试修改forEach时，都会得到错误的结果。

y.value

如果能在这里帮助我，将不胜感激。

Answer 1

没有

id字段

在对象x中

。只是

x.value

和

x.name

有效以进行检索。因此，您的查询需要更改。

通常在MongoDB中，您也只使用内部_id属性来标识对象。您必须注意常规的foreach循环和异步操作。最好使用类似

的库

异步

或异步/等待

.forEach循环中的猫鼬.findOne（）错误的结果

1 个答案: