BackboneJS collection.findWhere()方法
发布于 2015-08-14 15:26:33 | 144 次阅读 | 评论: 0 | 来源: 网络整理
它类似于where 方法，直接返回集合中第一模型相匹配传递的属性。
语法
collection.findWhere(attributes)
参数:
- attributes: 表示一个定义的模型的属性。
示例
<!DOCTYPE html>
<head>
<title>Collection Example</title>
<script src="https://code.jquery.com/jquery-2.1.3.min.js" type="text/javascript"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js" type="text/javascript"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js" type="text/javascript"></script>
</head>
<body>
<script type="text/javascript">
//'Players' is a model name and containa default values
var Players = Backbone.Model.extend({
defaults: {
id:"",
name: "",
country:""
}
});
//The 'PlayersCollection' is an instance of the collection
var PlayersCollection = Backbone.Collection.extend({
model: Players //The model 'Players' is specified by overriding the "model" property of the collection
});
$(function(){
var mycollection = new PlayersCollection();
// The set() method to sets the values for 'id', 'name' and 'country' attributes, specified in the model "Players"
mycollection.set([{id:1, name: 'dhoni', country:'india'},
{id:2, name:'gayle', country:'west indies'},
{id:3, name: 'maxwell', country:'australia'},
{id:4, name: 'duminy', country:'south africa'}
]);
// The findWhere() method finds the model containing with the id '1'
var res=mycollection.findWhere({id:1});
//Display the result in the JSON format
document.write("The values of matched attribute are: ",JSON.stringify(res));
});
</script>
</body>
</html>
输出
让我们进行以下步骤来看看上面的代码工作：
-
保存上述代码在文件findwhere.html
-
在浏览器打开这个HTML文件。
