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angularjs select depending on number of options in model

I currently have a select in an angular app :
http://jsfiddle.net/4qKyx/251/
And I'm trying to manage my select depending on the number of result.
HTML
<div ng-controller="MyCtrl">
<select ng-model="form.type" required="required" ng-options="option.value as option.name for option in typeOptions" >
</select>
</div>
JS
var myApp = angular.module('myApp',[]);
function MyCtrl($scope) {
$scope.typeOptions = [
{ name: 'Feature', value: 'feature' },
{ name: 'Bug', value: 'bug' },
{ name: 'Enhancement', value: 'enhancement' }
];
if($scope.typeOptions.length == 1){
$scope.form = {type : $scope.typeOptions[0].value};
}else{
// first option set to "select an option" and null -> won't work with required
}
}
If I have only one element in my typeOptions, i want the only option to be pre-selected. Now if I have more than one element, I want an option saying "Select an option" but which can't be let selected in a required select. Thank you in advance for any help !

Can you try you controller code as like below,
var myApp = angular.module('myApp',[]);
function MyCtrl($scope) {
$scope.form = {};
$scope.typeOptions = [
{ name: 'Feature', value: 'feature' },
{ name: 'Bug', value: 'bug' },
{ name: 'Enhancement', value: 'enhancement' }
];
$scope.form.type=($scope.typeOptions.length===1) ? $scope.typeOptions[0].value : '';
}
also updated your jsfiddler

The code you've provided on SO works.
Your issue is only on the fiddler with the line
<option style="display:none" value="">select a type</option>
if you want your "placeholder" inside the select, you can do it like that :
if($scope.typeOptions.length == 1){
$scope.form = {type : $scope.typeOptions[0].value};
}else{
$scope.typeOptions.unshift( { name: 'Select a value', value: '' });
}

you can add option element to your select to be like
<select ng-model="" required
ng-options="option.value for option in typeOptions">
<option value=''>- Please Choose -</option>
</select>
and just do the check in you controller if the options.length equals 1 then set the ng-model the good thing is the required validation still works.
here is jsfiddle
if you removed the comment it show select option

AngularJS Custom Directive using ng-options populated from service

I've really hit a brick wall with this, and I know I'm probably missing something here, but I'm stuck and need help. What I'm trying to do is use a service to populate the options in an ng-options directive; however, the ng-options are inside of a custom directive, and I've tried everything from track by, to testing it outside of the directive, inside the directive, etc. Can someone please take a look at this code and see if you can spot what I'm missing? Any help is greatly appreciated. It WILL work as far as executing the update to the ng-model; however, at page landing and record selection, it will not initially select the proper option, but if I take the track by out, it will initialize with the proper selection, it just won't update ng-model when/if I do that.
angular
.module('app')
.controller('mainCtrl', ['acctList', 'CONSTANTS', 'FORMFIELDS', function(acctList, CONSTANTS, FORMFIELDS) {
var mainCtrl = this;
mainCtrl.form = {};
mainCtrl.formFields = FORMFIELDS;
mainCtrl.currentRecord = null;
mainCtrl.editedRecord = {};
mainCtrl.setCurrentRecord = function(value) {
mainCtrl.currentRecord = value;
mainCtrl.editedRecord = angular.copy(mainCtrl.currentRecord);
};
mainCtrl.statuses = CONSTANTS.statuses;
}])
.value('FORMFIELDS', [
{
key: 'active_flag',
inputtype: 'select',
type: 'text',
class: 'form-control',
id: 'activeFl',
name: 'activeFl',
placeholder: 'Active Flag',
required: true,
maxlength: 1,
disabled: false,
labelfor: 'inputActiveFl',
labeltext: 'Active Flag',
field: 'mainCtrl.editedRecord.ACTIVE_FL',
options: 'list as list.desc for list in mainCtrl.statuses track by list.value'
}
])
.value('CONSTANTS',
{
statuses: [
{
id: 1,
value: "Y",
desc: "Active"
},
{
id: 2,
value: "N",
desc: "Inactive"
}
]
}
)
.directive('formTemplate', ['$compile', function($compile) {
function linker(scope, element, attr) {
scope.$watch(attr.modeltemp, function(modeltemp) {
// if ngModel already equals modeltemp or modeltemp doesn't exist, return
if (attr.ngModel == modeltemp || !modeltemp) return;
// remove all attributes to prevent duplication
element.removeAttr('placeholder');
element.removeAttr('type');
element.removeAttr('class');
element.removeAttr('id');
element.removeAttr('name');
element.removeAttr('ng-required');
element.removeAttr('maxlength');
element.removeAttr('ng-disabled');
// add the ng-model attribute presently tied to modeltemp
element.attr('ng-model', modeltemp);
// if modeltemp is blank, then remove ng-model, as it would be null
if (modeltemp == '') {
element.removeAttr('ng-model');
}
// Unbind all previous event handlers, this is
// necessary to remove previously linked models.
element.off();
// run a compile on the element, injecting scope, to reconstruct the element
$compile(element)(scope);
});
console.log(scope.acctCtrl);
}
// dynamic templating function associated with the templateUrl in the DDO
function template (tElement, tAttrs) {
// set the type variable equal to the value from the tAttr for 'inputtype' coming from the view
var type = tAttrs['inputtype'];
// just declaring the return variable for cleanliness
var tpl;
// begin the switch-case statement for each inputtype, then set it's return variable equal to the respective url
switch(type) {
case 'input':
tpl = '/common/directives/formTemplate/formTemplate.template.html';
break;
case 'select':
tpl = '/common/directives/formTemplate/formTemplateSelect.template.html';
break;
default:
tpl = '/common/directives/formTemplate/formTemplate.template.html';
break;
}
return tpl;
}
return {
restrict: 'EA',
replace: true,
templateUrl: template,
link: linker
};
}])
<form class="form-horizontal" ng-submit="submit()" name="mainCtrl.form.newAcctForm">
<div class="col-lg-6 form-fields" ng-repeat="fields in mainCtrl.formFields" ng-class="{ 'has-error': mainCtrl.form.newAcctForm.{{fields.name}}.$dirty }">
<label class="control-label" for="{{fields.labelfor}}">{{fields.labeltext}}</label>
<div form-template modeltemp="fields.field" inputtype="{{fields.inputtype}}"></div>
</div>
</form>
<select class="{{fields.class}}" id="{{fields.id}}" name="{{fields.name}}" ng-options="{{fields.options}}" ng-required="{{fields.required}}" maxlength="{{fields.maxlength}}" ng-disabled="{{fields.disabled}}">
<option value="">Please select...</option>
</select>

While this does work, did you consider using lifecycle hooks instead, waiting until after the view has loaded/initialized? Your solution works, but it's a bit like using a rocket launcher on an ant hill.

AngularJS + select2 - How to set initial value

I want to use Select2 in my AngularJS project, So I added an input like this :
<select class="find-neighborhood js-states form-control"
ng-model="regionIdentifier"
ng-init="">
</select>
Luckily , Whenever regionIdentifier is change, I find out. Actually I want to set initial value in my Select2. Here is my javascript code :
$(".find-neighborhood").select2({
dir: "rtl",
placeholder: "find neighborhood ...",
allowClear: true,
data: $scope.regions
});
My $scope.regions looks like :
[object,object,object]
Each object is like :
0 :Object
id:52623
regionSlug:yvuj
text:yvuj1
How to init value in my select2?

You should create a directive to make this work globally and fine. Here is a simple example which let you initialize a select2 set the default option values to your selection. You can find a working version on plnkr. While select2 depends on jQuery you may will look for an other lib to make it work. Some dev's preffer to have no jQuery included in AngularJS projects.
Controller
//option list
$scope.regions = {
'test1' : {
id: 1
},
'test2' : {
id: 2
},
'test3' : {
id: 3
},
'test4' : {
id: 4
},
'test5' : {
id: 5
}
};
//model & selected value setup
$scope.regionIdentifier = 3;
View
<select class="js-example-basic-single"
ng-model="regionIdentifier"
items="regions"
items-selected="regionIdentifier"
id="regionSelection"
select-two>
</select>
Directive
/**
* Simple select2 directive
*/
angular.module('app').directive('selectTwo', ['$timeout', function($timeout){
return {
restrict : 'EA',
transclude : true,
terminal: true,
templateUrl : 'views/directive/select2.html',
scope: {
items: "=",
itemsSelected: "="
},
link: function($scope, $element, $attrs, $controller){
//format options https://select2.github.io/select2/#documentation
function format(state) {
//init default state
var optionTemplate = state.text;
if (!state.id || state.id == 0) { //option group or no selection item
return optionTemplate;
}
return optionTemplate;
}
//init on load
$timeout(function(){
//if multiple options are possible, parse an comma seperated list into itemsSelected like 1,2,5,23,21
if (angular.isString($scope.itemsSelected) && $scope.itemsSelected.split(',').length > 1) {
$scope.itemsSelected = $scope.itemsSelected.split(',');
}
$($element[0]).select2({
formatResult: format,
formatSelection: format,
escapeMarkup: function(m) { return m; }
}).val($scope.itemsSelected == undefined ? [0]: [$scope.itemsSelected]).trigger("change");
});
}
};
}]);
Directive template views/directive/select2.html
<option ng-repeat="(name, item) in items track by $index"
value="{{ item.id }}">
{{ name }}
</option>

Cannot select default value in dropdown using ng-model and ng-repeat or ng-select in AngularJS

i'm really new to AngularJS and i like it very much.
But i'm experiencing a problem trying to initialize a prealoaded dropdown with a specific value.
The dropdown is initialized with values available from JSON array, but when i try to select a default value in this dropdown, i don't see that value selected but the ng-model variable is set correctly.
I created a plunker example here http://plnkr.co/edit/7su3Etr1JNYEz324CMy7?p=preview tryng to achieve what i want, but i can't get it to work. I tried with ng-repeat and ng-select, with no luck. Another try i did (in this example) is trying to set the ng-selected property.
This is a part of my html
<body ng-controller="MySampleController">
<select name="repeatSelect" id="repeatSelect" ng-model="SelectedStatus" ng-init="SelectedStatus">
<option ng-repeat="option in StatusList[0]" value="{{option.key}}" ng-selected="{{option.key==SelectedStatus}}">{{option.name}}</option>
</select>
<select name="repeatSelect" id="repeatSelect" ng-model="SelectedOrigin">
<option ng-repeat="option in OriginList[0]" value="{{option.key}}" ng-selected="{{option.key == SelectedOrigin}}">{{option.key}} - {{option.name}}</option>
</select>
<pre>Selected Value For Status: {{SelectedStatus}}</pre>
<pre>{{StatusList[0]}}</pre>
<pre>Selected Value For Origin: {{SelectedOrigin}}</pre>
<pre>{{OriginList[0]}}</pre>
</body>
And this is code from my controller
function MySampleController($scope) {
$scope.StatusList = [];
$scope.OriginList = [];
$scope.ServiceCall = {};
$scope.EntityList = [];
$scope.SelectedStatus = -3;
$scope.SelectedOrigin = 1;
var myList = [
{
item: 'Status',
values: [{ key: -3, name: 'Aperto' },
{ key: -1, name: 'Chiuso' }]
},
{
item: 'Origin',
values: [{ key: 1, name: 'Origin1' },
{ key: 2, name: 'Origin2' },
{ key: 3, name: 'Origin3' }]
}
];
$scope.documentsData = myList;
angular.forEach($scope.documentsData, function (value) {
$scope.EntityList.push(value);
switch ($scope.EntityList[0].item) {
case 'Status':
$scope.StatusList.push($scope.EntityList[0].values);
$scope.EntityList = [];
break;
case 'Origin':
$scope.OriginList.push($scope.EntityList[0].values);
$scope.EntityList = [];
break;
}
});
}
Any help would be appreciated!
Thanks in advance.

You can at least use ng-options instead of ng-repeat + option, in which case the default value works just fine.
<select name="repeatSelect" id="repeatSelect"
ng-options="opt.key as opt.key+'-'+opt.name for opt in StatusList[0]"
ng-model="SelectedStatus"></select>`
You can also make it a bit more readable by specifying the option label as a scope function.
HTML: ng-options="opt.key as getOptionLabel(opt) for opt in StatusList[0]"
Controller:
$scope.getOptionLabel = function(option) {
return option.key + " - " + option.name;
}
Plunker: http://plnkr.co/edit/7BcAuzX5JV7lCQh772oo?p=preview

Value of a select directive used without ngOptions is always a string.
Set as following and it would work
$scope.SelectedStatus = '-3';
$scope.SelectedOrigin = '1';
Read answer here in details ng-selected does not work with ng-repeat to set default value

Preselected option by ng-init doesn't work in ngOptions | AngularJS

I have object product = {id: "759", name: "someName", category_id: "139", cartridge_type: 2 ...} in my angular controller.
Why preselected option in ngOptions doesn't work? Select renders empty option as if product.cartridge_type would be null.
HTML
<select class="form-control"
id="cartridge_type"
name="cartridge_type"
ng-init="product.cartridge_type=product.cartridge_type||cartridgeTypeScope[0]"
ng-model="product.cartridge_type"
ng-options="cartridge_type.id as cartridge_type.name for cartridge_type in cartridgeTypeScope">
<option value="">Select type</option>
</select>
JS
$http.get('someApiPath').success(function(data) {
$scope.product = data[0];
console.log( $scope.product );
});
$scope.cartridgeTypeScope = [
{
id: 0,
name : '-'
},
{
id: 1,
name : 'cartridgeType1'
},
{
id: 2,
name : 'cartridgeType2'
}
]

Just simple use cartridgeTypeScope[0].id in ng-init
ng-init="product.cartridge_type=product.cartridge_type||cartridgeTypeScope[0].id"
Thing is that you are using cartridge_type.id as cartridge_type.name which is expecting id in the select but in ng-init you are providing it complete object (cartridgeTypeScope[0]).
So it is not selecting your option value.
Alternatively you can do
You can use same ng-init but remove cartridge_type.id as from your ng-options
ng-init="product.cartridge_type=product.cartridge_type||cartridgeTypeScope[0]"
ng-options="cartridge_type.name for cartridge_type in cartridgeTypeScope"
Hope It help :)
UPDATE
For controller default option you need to do
$scope.product={
"cartridge_type":2
}
UPADTE 2:-
For $http:-
Plunker