角度选择，具有动态值的ng-init

Question

I'm trying to get a select box working in Angular. The problem I'm experiencing is to do with ng-init and setting it's default value from an object which is created during runtime. Heres my code:

        <select 
            ng-model="settings.editing.panel.data.production_company"
            ng-change="settings.editing.panel.data.production_company = selectValue"
            ng-init="selectValue = settings.editing.panel.data.production_company"  
        >
            <option 
                ng-repeat="(key, value) in lists.production_companies" 
                value="{{key}}"
                ng-selected="{{selectValue}}" 
                >
                    {{value}}
                </option>
        </select>

"lists.production_companies" is a simple key-value array of names, populated during initial page render, updated by ajax.

The object "settings.editing.panel.data" starts its life as NULL, but later is loaded with a correctly formatted object which contains the property "production_company".

I have found setting ng-init to something like "ng-init="selectValue = 3" works fine. Setting a $scope.test = 3, then setting "ng-init="selectValue = test" works fine too.

However, my dynamic value does not work. How can I use my dynamically created object to set the value of this select box during runtime with the set-up I have?

Answer 1

You question confused me somehow. The following snippet is a working one, is that what you want?

 'use strict'; angular.module('DemoApp', []); angular.module('DemoApp').controller('DemoCtrl', ['$scope', function($scope){ $scope.lists={ production_companies: { "0": "prod 1", "1":"prod_2" }, }; $scope.settings={ editing: { panel: { data: null } } }; $scope.setData=function(data){ $scope.settings.editing.panel.data={ production_company: data }; }; }]); 

 <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script> <div ng-app="DemoApp" ng-controller="DemoCtrl"> <select ng-model = "settings.editing.panel.data.production_company"> <option ng-repeat = "(key, value) in lists.production_companies" value = "{{key}}">{{value}}</option> </select> <div>You select: {{settings.editing.panel.data.production_company}}</div> <button ng-click="setData('0')">Set Data to Prod1</button> <button ng-click="setData('1')">Set Data to Prod2</button> </div> 

Answer 2

<select 
            ng-model="settings.editing.panel.data.production_company"
            ng-options = "option as option.keyName for option in list.production_companies"
        > <!--set keyName equal to your object's key-->

        </select>

Then in your controller

$scope.settings.editing.panel.data.production_company = list.production_companies[0] // Or which value you want to assign

Answer 3

In my circumstances I was able to change my backends data format to set an object like:

{"id": 1, "name":"prod comp 1"} 

and then change my select model accordingly. In hindsight I needed this for the ID anyway.

<select 
    ng-model="settings.editing.panel.data.production_company"
>
    <option 
        ng-repeat="option in settings.lists.production_companies" 
        value="{{option.id}}"
        ng-selected="{{option.id}} == settings.editing.panel.data.production_company"
    >
        {{option.name}}
    </option>
</select>