javascript 如何在 AngularJS 中选择选项中的文本格式？
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How to format text in options for select in AngularJS?
提问by Melvin
I have the following json object:
我有以下 json 对象：
$scope.values = [
{
"id": 2,
"code": "Code 1",
"name": "Sample 1"
},
{
"id": 4,
"code": "Code 2",
"name": "Sample 2"
},
{
"id": 7,
"code": "Code 3",
"name": "Sample 3"
}
];
In select tag, I have this:
在选择标签中，我有这个：
<select name="c_id" ng-options="c.id as c.code for c in values"></select>
The generated select options is:
生成的选择选项是：
Code 1
Code 2
Code 3
Is there any way to format the text in the options like the following?
有什么方法可以在如下选项中格式化文本吗？
Code 1 -- Sample 1
Code 2 -- Sample 2
Code 3 -- Sample 3
Or I'll just have to prepare the values before attaching them to the model? Any help is appreciated. Thank you.
或者我只需要在将值附加到模型之前准备值？任何帮助表示赞赏。谢谢你。
回答by Cherniv
You can do it by using this syntax:
您可以使用以下语法来做到这一点：
ng-options="c.id as (c.code + ' -- '+ c.name) for c in values"
Example: http://jsfiddle.net/cherniv/6EkL7/1/
示例：http: //jsfiddle.net/cherniv/6EkL7/1/
Or someone may like next syntax:
或者有人可能喜欢下一个语法：
ng-options="c.id as [c.code,c.name].join(' -- ') for c in values"
Example: http://jsfiddle.net/cherniv/6EkL7/2/
示例：http: //jsfiddle.net/cherniv/6EkL7/2/
But in some cases there is rationality in using a Filter , like:
但在某些情况下，使用 Filter 是合理的，例如：
app.filter("formatter",function(){
return function(item){
return item.code+ " -- " + item.name;
}
})
And: ng-options="c.id as c|formatter for c in values"
和： ng-options="c.id as c|formatter for c in values"
Example: http://jsfiddle.net/cherniv/K8572/
