AngularJS：带键值的ng-repeat - 更新对象

I am rendering key:value object array with ng-repeat like this:

我正在渲染关键：使用ng-repeat的值对象数组，如下所示：

<div ng-controller="mainCtrl">    
  <div ng-repeat="record in records">
    <div ng-repeat="(key, value) in record">
        <input ng-model="key" />: <input ng-model="value" />
    </div>
  </div>
</div>

JS:

JS：

var mainCtrl = function($scope){
$scope.records = [
        {'key1':'val1'},
        {'key2':'val2'}
        ];
}

Problem is that keys and values cannot be updated through input tags. For some reason it becomes one way binding after making ng-repeat iterate over (key,value).

问题是无法通过输入标签更新键和值。由于某种原因，在使用ng-repeat迭代（键，值）后，它成为单向绑定。

Fiddle: http://jsfiddle.net/BSbqU/1/

小提琴：http：//jsfiddle.net/BSbqU/1/

How can I make it a two way binding? Or should I approach this problem in a different way then nested ng-repeat?

我怎样才能使它成双向绑定？或者我应该以不同的方式处理此问题然后嵌套ng-repeat？

3 个解决方案

#1

<div ng-controller="mainCtrl">    
<div ng-repeat="record in records">

        <input ng-model="record.name" />: <input ng-model="record.value" />
    </div>
</div>

And the JS:

和JS：

var myApp = angular.module('myApp', []);

var mainCtrl = function($scope){
$scope.records = [
{'name':'key1','value':'val1'},
{'name':'key2', 'value':'val2'}
        ];
}

#2

This option works with object:

此选项适用于对象：

<div ng-controller="mainCtrl">    
  <div ng-repeat="record in records">
    <div ng-repeat="(key, value) in record">
        <input ng-model="key" />: <input ng-model="record[key]" />
    </div>
  </div>
</div>

Not a brilliant, but it works.

不是很棒，但它确实有效。

#3

After scratching my head to the bone, i find a way to update object key names. It is a bit twisted but it works for me.

在抓住我的头骨后，我找到了更新对象键名称的方法。它有点扭曲，但它对我有用。

replace

更换

<input ng-model="key" />

with

同

<input type="text" ng-model="key" ng-change="update_key(record,key,$index)" line-key/>

you will need the 'lineKey' directive just to keep focus on your input

你需要'lineKey'指令才能专注于你的输入

var app = angular.module('myApp',[]);
var focus_key=-1;
app.directive('lineKey', function () {
    return function (scope, element, attrs) {
        if(focus_key==scope[attrs.ngModel]){
            focus_key=-1;
            element[0].focus();
        }
    };
});

finally, add the 'update_key' method to your controller

最后，将“update_key”方法添加到控制器

app.controller('mainCtrl',['$scope'],function($scope){
        $scope.records = [
        {'key1':'val1'},
        {'key2':'val2'}
    ];
    $scope.update_key=function(obj,new_key,id){
        var keys    = Object.keys(obj);
        var values  = Object.values(obj);
        var old_key = keys[id];
        if(keys.indexOf(new_key)==-1&&new_key.length>0){
            // clear ...
            for(var i=0,key;key=keys[i];i++){   delete obj[key];    }
            keys[id]=new_key;//... change key value ...
            focus_key=new_key;//... notify to keep focus on modifyed input ...
            // ... and refill to preserve the position in the object list
            for(var i=0,key;key=keys[i];i++){   obj[key]=values[i]; }
        }
    };
}

#1

<div ng-controller="mainCtrl">    
<div ng-repeat="record in records">

        <input ng-model="record.name" />: <input ng-model="record.value" />
    </div>
</div>