AngularJS：将表单字段的值设置为各种对象属性

Question

我有一个简单的 AngularJS 动态表单，它由 ng-model 绑定到属性 modelParams.value。每个表单字段都显示 modelParams.value 的值 但是，我想要一个名为“Default”的按钮，它将所有表单字段的值设置为该关联数组中的某个其他属性，例如 modelParams.defaultValue 或 modelParams。旧值。我假设一旦按下“默认”按钮，这将覆盖 ng-model="modelParams.value" 的值。

这是表格：

<form name="modelParamsForm">                   
    <div class="form-group" ng-repeat="modelParam in modelParams">
        <div class="row">
         //INPUT FORM FIELDS
         <input type="number" class="form-control input-sm" required ng-
         model="modelParam.value" >
        </div>
    </div>

    <button class="btn btn-primary btn-sm" ng-
        click="updateModelParams(modelParams, modelParamsForm)">
    </button>
    //DEFAULT BUTTON
    <button type="button" class="btn btn-default btn-sm" ng-
     click="default()">Default</button>         
</form>

我的 JSON 如下所示：

[{"model":"MAF","paramname":"CascDefaultSpreadOverride","minvalue":"0","maxvalue":"100","description":"The defaault repo spread override to use for CASC positions.","defaultvalue":1.0,"value":1.0,"datatype":"FLOAT"},{"model":"MAF","paramname":"DefaultLotSize","minvalue":"1","maxvalue":"1000","description":"The minimum lot size that must be met for a collateral allocation.","defaultvalue":1.0,"value":1.0,"datatype":"INTEGER"},{"model":"MAF","paramname":"HtbColdHaircut","minvalue":"0","maxvalue":"100","description":"The haircut to apply to positions with a Cold HTB category.","defaultvalue":0.1,"value":0.1,"datatype":"FLOAT"},{"model":"MAF","paramname":"HtbExtraHotHaircut","minvalue":"0","maxvalue":"100","description":"The haircut to apply to positions with a Extra-Hot HTB category.","defaultvalue":0.9,"value":0.9,"datatype":"FLOAT"},]

Answer 1

$scope.field = 'value';

$scope.change = function() {
  $scope.field = 'oldValue';
}


...ng repeat blabla
<input ng-model="modelParam[field]"/>
...
<button ng-click="change()">Change</button>

编辑：这是一个工作演示：http://jsfiddle.net/zy94an54/