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Select tag value in html disappears when selecting a value in angularjs

I have a select tag in html which has a value from angularjs. Everytime I select a value, the select tag will be empty. Why? How to fix it?
$scope.getAll = function(){
$http.post()....
$scope.places = response.data;
};
$scope.getAll();
$scope.sample = function(str){
alert(str);
};
HTML
<select ng-model="val" ng-change="sample(val)">
<option ng-repeat="place in places" value="place.name">{{place.name}}</option>
</select>
In code above, when I select some value of the select tag it alerts me the value but the select tag goes empty!

i recommend instead of using ng-repeat use ng-options
angular.module("app",[])
.controller("ctrl",function($scope){
$scope.places = [ {name: 'California'},
{name: 'New York'},
{name: 'Cochin'}
];
})
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="app" ng-controller="ctrl">
<select ng-model="val" ng-change="sample(val)" ng-options="place.name as place.name for place in places">
</select>
{{val}}
</div>

When setting the value of the option as an expression, try using ng-value .
While your question is confusing, I'm guessing that the alert shows up as place.name
<select ng-model="val" ng-change="sample(val)">
<option ng-repeat="place in places" ng-value="place.name">{{place.name}}</option>
</select>
Or if you want to set the value of the select attribute itself, you can use,
<select ng-model="val" ng-change="sample(val)">
<option ng-repeat="place in places" value="{{place.name}}">{{place.name}}</option>
</select>
https://plnkr.co/edit/fAbqV1wG2VuF069lt3bm?p=preview
This might be able to guide you further.

AngularJS - ng-change not firing

I'm setting the ng-change directive in a select element of my form but the function linked to it is not called when I change the value. I've been reading very similar questions and applying the answers I see and so far none has worked yet.
Can you see wjat I'm doing wrong?
My HTML:
<div class="row" ng-app="quoteApp">
<div class="col-lg-12" ng-controller="QuoteController" ng-init="initialize()">
<h1 class="page-header">Quote</h1>
<div class="form-group">
<label>Carrier</label>
<select class="form-control" ng-model="form_carrier_id" ng-change="loadProducts()">
<option ng-repeat="carrier in carriers" value="{{carrier.id}}">{[{carrier.name}]}</option>
</select>
</div>
<div class="form-group">
<label>Product</label>
<select class="form-control" ng-model="form_product_id">
<option value=""></option>
<option ng-repeat="product in products" value="{{product.id}}">{[{product.name}]}</option>
</select>
</div>
</div>
</div>
And my controller:
angular.module('quoteApp', ['angular-loading-bar']).config(function($interpolateProvider){
$interpolateProvider.startSymbol('{[{').endSymbol('}]}');
})
.controller('QuoteController', function ($scope, $http) {
$scope.carriers = [];
$scope.products = [];
$scope.form_carrier_id = '';
$scope.form_product_id = '';
$scope.getUrl = function(action){return '/admin/application/quote/json?action='+ action;}
$scope.initialize = function(){
// Get the list of carriers
$http.get($scope.getUrl('getCarriers'))
.success(function (data) {
$scope.carriers = data;
})
.error(function () {
alert('Error loading carriers');
});
}
$scope.loadProducts = function(){
alert('HERE');
}
});
For me everything looks right. Can you see what I'm missing? The first select loads normally, the problem is that when I change its value the function loadProducts is not fired.
Thanks

this may not be the problem itself, however you should always use ng-options rather than <option ng-repeat>
I've seen some weird behaviour in the past due to that

I have found what was the problem. It was how I was filling the select. It has to be filled like this:
<select class="form-control" ng-model="form_carrier_id"
ng-options='carrier.id as carrier.name for carrier in carriers'
ng-change="loadProducts()">
</select>

Try using ng-options for repeating the products in your select element.
You can use ng-options as follows:
<select class="form-control" ng-model="form_product_id"
ng-options="product.id as product.name for product in products" ng-change="loadProducts()">
<option value="">Select color</option>
</select>
not as the products are set values, the loadProduct should trigger, whenever a value is selected as the ng-model would be set

Angularjs - Change value based on siblings

I am trying to have multiple dropdown selects which will decide on specific input values
The HTML
<div ng-repeat="i in [1,2,3]">
<select name="singleSelect" ng-model="chosenitem" style="width:100%;" ng-change="changedValue(i,$index)" >
<option value="" disabled selected>choose item</option>
<option ng-repeat="me in stuffs">{{me.item}}</option>
</select>
<input type="text" ng-model="inputattr[i]" placeholder="attribute">
</div>
The controller
app.controller('MainCtrl', function($scope) {
$scope.name = 'World';
$scope.stuffs = [
{item:'car', attribute:'wheels'},
{item:'plane', attribute:'wings'},
{item:'boat', attribute:'propeller'}
];
$scope.changedValue = function(i,j){
$scope.inputattr[i] = $scope.stuffs[j].attribute;
};
});
The problem is inputattr is dynamic. I can never get it to work. Here is my plunk.

see this plunkr: http://plnkr.co/edit/GVanAH70oyEEI16Nbf0t
you never actually initialized inputattr. there also was an issue with your indexes, which should usually start at 0.

The reason your code is not working is because inputattr is not initialized. Add
$scope.inputattr = ['','',''];
inside MainCtrl. That will do the trick.

Passing an ng-model value to an object

I have a list made with ng-repeat with options. I'm trying to make it so that when I click an option, the value of the selection will be passed to an object.
<select id="selectvak" name="selectvak" class="form-control" multiple="multiple" >
<option value="1" ng-repeat="t in klas" ng-model="vakselect">{{ t.Name }}</option>
</select>
$scope.user = {
vak: klas.vakselect,
};
I have small experience with Angular, so I'm not sure how to make it work correctly.
Edit:
I have adjusted my code and user.vak does seem to catch the selectvak field, but now passes it as an array. How do I make it so it's a string in $scope.user? So whenever I log user, I will see a string of vak and then an array of students.
<select id="selectvak" name="selectvak" class="form-control" multiple="multiple" ng-model="user.vak" ng-options="t.Name as t.Name for t in klas" ng-click="getJSON1()">
$scope.user = {
vak: '',
// klas: klasselect,
student: [$scope.student] -1
};

TLJ and Arnaud are correct.
But answering your initial question, in the select tag, instead of ng-model="vakselect" just use ng-model="user.vak".
Then, when the value of the select changes, the value of user.vak will change automatically.

real code is this : (and nothing to do inside the controller.
<select id="selectvak" name="selectvak" class="form-control" multiple="multiple" ng-model="user.vak">
<option value="1" ng-repeat="t in klas">{{ t.Name }}</option>
</select>
And you should use ng-options instead of ng-repeat to create your options
https://docs.angularjs.org/api/ng/directive/ngOptions

This will add t.name to an array when you click the option. Take a look at the controller function and the ng-click in the partial.
<select id="selectvak" name="selectvak" class="form-control" multiple="multiple" >
<option value="1" ng-repeat="t in klas" ng-click="add(t.Name)" ng-model="vakselect">{{ t.Name }}</option>
</select>
var string_option;
$scope.add = function(t) {
string_option = t;
console.log(string_option )
}

AngularJS : Why is my ng-change not logging the actual model item, but instead the binding text?

My model is the array vh.loadedViews with 4 items.
My ng-repeat on the option: ng-repeat="view in vh.loadedViews"
my ng-model on the select: ng-model="view.description"
However in my ng-change function vh.chooseView it's printing out the binding text and not the actual model data.
Markup:
<section class="saved-views-modal" ng-show="vh.loadSavedModal">
<header><h1>Select a saved view</h1></header>
<select name="select"
ng-model="view.description"
ng-change="vh.chooseView(view.description)">
<option ng-repeat="view in vh.loadedViews"
value="view.description">{{view.description}}</option>
</select>
<button class="btn-green"
ng-click="vh.loadSavedView(view.description)">
Load View
</button>
</section>
Directive Controller:
var vm = this; // vh in markup
vm.chooseView = function(description) {
console.log('chooseView > view.description: ');
console.log(description);
}

You have not populated value tag of your options. You should populate it using interpolation like value="{{view.description}}" to render option value.
Also you ng-model should be ng-model="vh.description" instead of view.description
Markup
<select name="select"
ng-model="vh.description"
ng-change="vh.chooseView(view.description)">
<option ng-repeat="view in vh.loadedViews"
value="{{view.description}}">{{view.description}}</option>
</select>