我想构建一个小应用程序（用于学习Angular JS），它可以定义位置列表和事件列表。该应用程序是基于此处的教程开发的：http://g00glen00b.be/prototyping-spring-boot-angularjs/。
在定义新事件时，我想关联新事件的位置。应使用组合框选择位置。
首先我定义了2个位置，让我们说位置1和位置2.我想以某种方式将可用位置列表（1和2）绑定到标有“位置选择”see this image
的组合框中到目前为止，我能够将位置列表绑定到组合框，但只有在刷新浏览器时才会更新组合框的项目。我希望能够在可用位置列表发生更改（添加新位置或删除位置）时自动刷新组合框的内容。
这是我的HTML：
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet"
href="./bower_components/bootstrap-css-only/css/bootstrap.min.css" />
</head>
<body ng-app="myEventApp">
<div class="container" ng-controller="EventAppController" >
<div class="page-header">
<h1>Edit Events</h1>
</div>
<div class="alert alert-info" role="alert"
ng-hide="events && events.length > 0">There are no events yet.
</div>
<form class="form-horizontal" role="form"
ng-submit="addEvent(newEventName,newEventDescription)" ng-controller="LocationAppController">
<div >Locations: {{locations}}</div>
<div class="form-group" ng-repeat="event in events">
<div class="checkbox col-xs-9">
<label> <strong>{{event.name}}</strong> /
{{event.description}}
</label>
</div>
<div class="col-xs-3">
<button class="pull-right btn btn-danger" type="button"
title="Delete" ng-click="deleteEvent(event)">
<span class="glyphicon glyphicon-trash"></span>
</button>
</div>
</div>
<hr />
<div class="input-group">
<input type="text" class="form-control" ng-model="newEventName"
placeholder="Enter the name..." /> <input type="text"
class="form-control" ng-model="newEventDescription"
placeholder="Enter the description..." />
<label for="locationSelect">Location select: </label>
<select
name="locationSelect" id="locationSelect" ng-model="data.repeatSelect">
<option value="">---Please select---</option>
<option ng-repeat="location in locations"
value="{{location.id}}">{{location.name}}</option>
</select>
<div class="col-md-6"></div>
<span class="input-group-btn">
<button class="btn btn-default" type="submit"
ng-disabled="!newEventName||!newEventDescription" title="Add">
<span class="glyphicon glyphicon-plus"></span>
</button>
</span>
</div>
</form>
</div>
<!-- Location -->
<div class="container" ng-controller="LocationAppController">
<div class="page-header">
<h1>Edit Locations</h1>
</div>
<div class="alert alert-info" role="alert"
ng-hide="locations && locations.length > 0">There are no
locations defined yet.</div>
<form class="form-horizontal" role="form"
ng-submit="addLocation(newLocationName,newLocationAddress)">
<div class="form-group" ng-repeat="location in locations">
<div class="checkbox col-xs-9">
<label> <strong>{{location.name}}</strong> /
{{location.address}}
</label>
</div>
<div class="col-xs-3">
<button class="pull-right btn btn-danger" type="button"
title="Delete" ng-click="deleteLocation(location)">
<span class="glyphicon glyphicon-trash"></span>
</button>
</div>
</div>
<hr />
<div class="input-group">
<input type="text" class="form-control" ng-model="newLocationName"
placeholder="Enter the name..." /> <input type="text"
class="form-control" ng-model="newLocationAddress"
placeholder="Enter the address..." />
<!-- <label>Location: </label> -->
<!-- <select -->
<!-- name="repeatSelect" id="repeatSelect" ng-model="data.repeatSelect"> -->
<!-- <option ng-repeat="option in data.availableOptions" -->
<!-- value="{{option.id}}">{{option.name}}</option> -->
<!-- </select> -->
<div class="col-md-6"></div>
<span class="input-group-btn">
<button class="btn btn-default" type="submit"
ng-disabled="!newLocationName||!newLocationAddress" title="Add">
<span class="glyphicon glyphicon-plus"></span>
</button>
</span>
</div>
</form>
</div>
<script type="text/javascript"
src="./bower_components/angular/angular.min.js"></script>
<script type="text/javascript"
src="./bower_components/angular-resource/angular-resource.min.js"></script>
<script type="text/javascript"
src="./bower_components/lodash/dist/lodash.min.js"></script>
<script type="text/javascript" src="./app/eventApp.js"></script>
<script type="text/javascript" src="./app/eventControllers.js"></script>
<script type="text/javascript" src="./app/eventServices.js"></script>
<script type="text/javascript" src="./app/locationControllers.js"></script>
<script type="text/javascript" src="./app/locationServices.js"></script>
<script type="text/css" src="./app/custom.css"></script>
</body>
</html>
这些是使用的控制器：
eventControllers.js
(function(angular) {
var EventAppController = function($scope, Event) {
Event.query(function(response) {
$scope.events = response ? response : [];
});
$scope.addEvent = function(name, description) {
new Event({
locations:[],
name : name,
description : description,
}).$save(function(event) {
$scope.events.push(event);
});
$scope.newEventName = "";
$scope.newEventDescription = "";
};
$scope.updateEvent = function(event) {
event.$update();
};
$scope.deleteEvent = function(event) {
event.$remove(function() {
$scope.events.splice($scope.events.indexOf(event), 1);
});
};
};
EventAppController.$inject = [ '$scope', 'Event' ];
angular.module("myEventApp.controllers").controller("EventAppController",
EventAppController);
}(angular));
locationControllers.js
(function(angular) {
var LocationAppController = function($scope, Location) {
Location.query(function(response) {
$scope.locations = response ? response : [];
});
$scope.addLocation = function(name, address) {
new Location({
name: name,
address: address,
}).$save(function(location) {
$scope.locations.push(location);
});
$scope.newLocationName = "";
$scope.newLocationAddress = "";
};
$scope.updateLocation = function(location) {
location.$update();
};
$scope.deleteLocation = function(location) {
location.$remove(function() {
$scope.locations.splice($scope.locations.indexOf(location), 1);
});
};
return {
getLocations: function() {
return $scope.locations;
}
}
};
LocationAppController.$inject = ['$scope', 'Location'];
angular.module("myEventApp.controllers").controller("LocationAppController", LocationAppController);
}(angular));
eventServices.js
(function(angular) {
var EventFactory = function($resource) {
return $resource('/event/:id', {
id : '@id'
}, {
update : {
method : "PUT"
},
remove : {
method : "DELETE"
}
});
};
EventFactory.$inject = [ '$resource' ];
angular.module("myEventApp.services").factory("Event", EventFactory);
}(angular));
locationServices.js
(function(angular) {
var LocationFactory = function($resource) {
return $resource('/location/:id', {
id : '@id'
}, {
update : {
method : "PUT"
},
remove : {
method : "DELETE"
}
});
};
LocationFactory.$inject = [ '$resource' ];
angular.module("myEventApp.services").factory("Location", LocationFactory);
}(angular));
所以，问题是：如何在添加新位置/删除位置时自动更新组合框的内容？谢谢。