如何设置NG选项preselected价值？ [英] How to set preselected value in ng-option?

问题描述

我有一个应该在下拉列表中选择城市ID，但我不能老是设法preSELECT它。我应该指令选择它或有任何其他方式？

 ＆LT;选择NG模型=cityIdNG选项=city.name城市在城市＆GT;＆LT; /选择＆GT;
 

解决方案

编辑NG-选项是：

  city.id作为city.name城市在城市
 

如果您获取城市和不知道的ID
你可以在你的JavaScript函数的成功说（它返回城市）：

  $ scope.cityId = the_cities [0] .ID
 

设置为第一选择
否则你可能只是说：

  $ scope.cityId = 1; //或存在什么
 

I have id from the city that is supposed to be selected in dropdown list, but I can`t manage to preselect it. Should I select it from directive or is there any other way?

<select  ng-model="cityId" ng-options="city.name for city in cities"></select>

解决方案

Edit your ng-options to this:

city.id as city.name for city in cities

if you fetch the cities and don't know the ID's you could say in your javascript success function (which returns the cities):

$scope.cityId = the_cities[0].ID

to set the first as selected Else you could just say:

$scope.cityId = 1; //or anything that exists

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