如何使angularJS ng模型与选择元素中的对象一起使用? [英] How to make angularJS ng-model work with objects in select elements?
问题描述
从option
元素传递对象时,我在select
元素上使用ng-model有问题.因此,假设我们有一个来自名为columns
(表的定义)的表的列数组,并且我们想根据此定义创建一些过滤器
I have a problem with ng-model on a select
element when passing an object from option
elements. So, imagine we have an array of columns from a table called columns
(the table's definition) and we'd like to creat some filters upon this definition
var columns = [
{name: 'Account ID', type: 'numeric'},
{name: 'Full name', type: 'text'},
{name: 'Date of birth', type: 'date'},
{name: 'Active', type: 'boolean'}
// and so on
];
var filters = [{}];
HTML:
<div class="form-field" ng-repeat="filter in filters">
<select ng-model="filter">
<option value="" disabled>Choose filter</option>
<option ng-repeat="column in columns" ng-value="column">{{column.name}}</option>
</select>
<input type="text" ng-model="filter.value">
</div>
如您所见,我希望该filter
能够获取column
的值并在其中添加特定的数据,因此在某个时刻,我的过滤器可能像这样:
As you can see, I'd like that filter
to get the value of column
and to add specific data in it, so at a certain moment, my filter could be like:
[
{name: 'Account ID', type: 'numeric', value: 123},
{name: 'Active', type: 'boolean', value: 'Yes'}
]
无论如何,我不确定这是这样做的方式,但是我想知道如何在编写控制器中的许多js代码的同时实现这种行为.
Anyway, I'm not sure this is the way of doing this, but I'd like to know how can I achieve this behavior, withour writing to much js code in the controller.
我做了一些变通办法来使用ng-change
完成此操作,传递filter
和column.name
,在columns
数组中找到列,获取type
属性,更新filter
,但我真的认为对此有一个更简单的答案.
I did some workaround to get this done using ng-change
, passing the filter
and the column.name
, find the column in the columns
array, get the type
property, update the filter
, but I really think that there is a simpler answer to this.
推荐答案
您可以使用 ng-options 将所选对象绑定到模型:
You can use ng-options to bind the selected object to a model:
<div class="form-field" ng-repeat="filter in filters">
<select ng-options="column.name for column in columns" ng-model="filter.value">
<option value="" disabled>Choose filter</option>
</select>
<input type="text" ng-model="filter.value.name">
</div>
更新后的答案:
<div class="form-field" ng-repeat="filter in filters">
<select ng-options="column.name for column in columns" ng-model="filters[$index]">
<option value="" disabled>Choose filter</option>
</select>
<input type="text" ng-model="filters[$index].name">
</div>
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