Develop Reference

Angular 2 - setting default value in dropdown when default is hard coded

I have the following dropdown. I want to set All Patients as the default value.
<select [(ngModel)]="searchModel.careprovider">
<option [value]="0">All Pateints</option>
<option *ngFor="let user of practiceUsers" [value]="user._id.$oid">
{{user.dn}}
</option>
</select>
My model is declared this way:
searchModel: any = { location: null, practice: null, name: '', careProvider: 0 };
I set the practiceUsers this way:
this._practice.getUsers(this.searchModel.practice).subscribe(result => {
this.practiceUsers = result;
this.searchModel.careProvider = 0;
});
No matter how I change it I always just get a blank option as the default. I've tried adding an object to the this.practiceUsers array after it is loaded, then setting the model value. I've tried setting the model value with and without quotes to see if a number or string made a difference. Everything I try still results in the default being the blank option.
In Angular 1 I would have used ng-options, but that is no longer available for Angular 2, and every example I find shows to use the ngFor for dropdowns.

Object attributes are case sensitive, in your object, attribute is called careProvider, but in your template, you are using searchModel.careprovider with lowercase p. I think you also have to use NgValue directive instead of value because you are using NgModel directive. So, this should work: it is not working
<select [(ngModel)]="searchModel.careProvider">
<option [ngValue]="0">All Pateints</option>
<option *ngFor="let user of practiceUsers" [ngValue]="user._id.$oid">
{{user.dn}}
</option>
</select>

Try to use [selected] attribute. I solved similar problem this way:
<select>
<option *ngFor="let option of options" value="{{option.id}}" [selected]="option === selectedOption">
{{option.name}}
</option>
</select>
I hope this helps a little

<select class="form-control" id="policeid_country_id" name="policeid_country_id" formControlName="policeid_country_id">
<option [ngValue]="null">Select</option>
<option [ngValue]="country.id" *ngFor="let country of countries">{{country.country}}</option>
</select>

How to make ng-options for display only the different value?

I want to make my ng-options element to display only the different value.
So now i have this.
But I want it to display only one by one value.
Example:
<select class="form-control" ng-model="main.singleProductListSelected">
<option value="test_pizza">Pizza Favorites</option>
<option value="test_pizza">Pasta</option>
<option value="test_pizza">Salads</option>
</select>
This is my html code
<select class="form-control"
ng-model="main.singleProductListSelected"
ng-options="singleOrdersProduct.category.name
for singleOrdersProduct in main.singleOrdersProductOptions">
</select>
Can I do this or i have to change the variable result?
Thanks!

<select class="form-control"
ng-model="main.singleProductListSelected"
ng-options="singleOrdersProduct.category.name for singleOrdersProduct in main.singleOrdersProductOptions | unique:'singleOrdersProduct.category.name'">
</select>
add unique: 'your item name here'

I would recommend lodash like library and create a array of unique value to use inside ng-options
inside controller
uniqueNames = _.uniq(_.pluck(main.singleOrdersProductOptions, 'name'))
use this uniqueNames inside select ng-options. Performance wise this would be good option

How to use angularjs to change the values of another select tag?

I have two Web API's that I am calling. Each value in the first api Type has an ID that needs to be used to filter the second api which is Category. The JSON is below:
// Types
[{"ID":1,"Text":"Hardware","Description":"Hardware"},
{"ID":2,"Text":"Software,"Description":"Software"}"}];
// Categories
[{"ID":1,"TypeID":1,"ParentID":0,"Name":"Printing"},
{"ID":2,"TypeID":1,"ParentID":1,"Name":"Toner"}]

First of all, you have to store selectedTypeID that will be used to filter another array, and than you can call Angular $filter in your second array.
Sintax:
$filter('filter')(array, expression, comparator)
e.g:
$filter('filter')($scope.categories, {TypeID: $scope.selectedTypeID}, comparator)

I think you're asking this: *How can I dynamically populate a select input based on the selection in another select input?
I think you can go two ways. If there is not much total data (like with Categories), you could use a filter on the second set of data. https://docs.angularjs.org/api/ng/filter/filter#!
You can do this in the HTML or in the controller!
<!-- HTML Page -->
<select>
<option ng-repeat="value in values | filter..." value=value>
</select>
// controller.js
values = ($filter('filter')(result.Values, {Id: $routeParams.Id}));
If there is lots of data to filter, consider delaying your call to the Category API until a Type is selected.
Without seeing the controller/HTML and whatnot, it's hard to give a specific answer, but I think this will get you moving in the right direction.

$scope.countries = CustomerService.getCountry();
$scope.getCountryStates = function(){
$scope.sates = CustomerService.getCountryState($scope.customer.Country);
$scope.cities =[];
};
<select ng-model="customer.State"
ng-options="x.Id as x.state for x in sates"
ng-change = "getStateCities()"
class="form-control"
ng-required="true"
id="state">
<option value="">-- Choose State --</option>
</select>
<select ng-model="customer.City"
ng-options="x.Id as x.city for x in cities"
class="form-control"
ng-required="true"
id="city">
<option value="">-- Choose City --</option>
</select>
Check complete code with demo

Get rid of blank entry in select tag

I have a number of items that get their data from a Json object and populate it using angular.
<select ng-model="MyCtrl.cargoList">
<option ng-repeat="cargo in MyCtrl.cargoList">{{ cargo.name }}</option>
</select>
And whenever I load the form, I get something like this in my console:
<select ng-model="MyCtrl.cargoList">
<option value="? object:25 "?></option>
<option value="">Gloves</option>
<option value="">Jacket</option>
<option value="">Shoes</option>
</select>
I can get the values to appear just fine, but I can't seem to get rid of the very first option. I don't mind the select box showing the very first element in the list, but I don't want it to be a blank line. How do I get rid of it?

You need to select 1st option by default on ng-init="MyCtrl.selectedCargo=MyCtrl.cargoList[0].name" & ng-model name should not be same as that of your cargoList.
Markup
<select ng-model="MyCtrl.selectedCargo" ng-init="MyCtrl.selectedCargo=MyCtrl.cargoList[0].name">
<option ng-repeat="cargo in MyCtrl.cargoList" value="cargo.name">{{ cargo.name }}</option>
</select>
Demo Plunkr

Use ngOption <option>
The ngOptions attribute can be used to dynamically generate a list of <option> elements for the <select> element using the array or object obtained by evaluating the ngOptions comprehension expression.
I have used following expression
label for value in array
HTML
<select ng-model="MyCtrl.cargo" ng-options="cargo.name for cargo in MyCtrl.cargoList">
</select>
and In your controller set model value as first element of list
this.cargo = this.cargoList[0]
Also note: You can use MyCtrl.cargoList as model as well as array So you should use another variable to hold the model value.

Use ng-options instead of ng-repeat
<select ng-model="MyCtrl.selectedListItem" ng-options="cargo for cargo in MyCtrl.cargoList"></select>
You can fine tune the labels/values further if you like, check the documentation here - https://docs.angularjs.org/api/ng/directive/ngOptions
You can ng-init, or set the first value to defualt, something like
MyCtrl.selectedListItem = MyCtrl.cargoList[0]
So if you want a function to detect you have changed the value of the select you would use ng-change like so :
<select ng-model="MyCtrl.selectedListItem" ng-options="cargo for cargo in MyCtrl.cargoList" ng-change="selectChanged"></select>
In your controller
$scope.selectChanged = function(){
//apply your logic
};

AngularJS, select onChange or ngChange

I'm new using angularjs and the angular user interface. I'm interested in the tag.
This is my html:
<select id="part1" ui-select2 ng-model="params.id" style="width: 200px;">
<option value="">Provinsi</option>
<option ng-repeat="v in prov" value="{{v.id}}" title="{{v.text}}"
ng-selected="v.id == params.id">{{v.text}}</option>
</select>
<select id="part2" ui-select2 ng-model="params2.id" style="width: 200px;" ng-disabled="true">
<option value="">Kabupaten</option>
<option ng-repeat="y in kab" value="{{y.id}}" title="{{y.text}}"
ng-selected="y.id == params.id">{{y.text}}</option>
</select>
and this my app.js :
$http.get('json/provinsiData.json').success(function(datax) {
$scope.prov = datax;
});
//part2 data
$http.get('json/acehData.json').success(function(datay) {
$scope.kab = datay;
});
$scope.params = {}
$scope.params2 = {}
As you can see select part2 is disabled.
How can I create an event change that works like the condition below?
if selected option of part1 is index 0
then select part2 disabled = false and load json part2 data.

The angular-js select supports the ng-change attribute which may call any javascript method defined in scope.
Example:
However your best bet may be just to evaluate an $scope expression in your ng-disabled= attribute, e.g. ng-disabled="params.id == 'X'".

With Angular, we usually aren't looking for events to trigger changes. Instead, when the model changes, the view should update to reflect those changes.
In this case, the second element should be enabled (not disabled) depending on a value in the model. When the model value connected to the first select menu satisfies some condition, enable the second menu. Yes, technically there's an event, but we don't need to care about it, all that matters are the model's values.
Here's a simplified example of how this might work:
<select ng-model="selection.item">
<option value="">Clothing</option>
<option ng-repeat="item in clothes">{{ item }}</option>
</select>
<select ng-model="selection.size" ng-disabled="!selection.item">
<option value="">Size</option>
<option ng-repeat="size in sizes">{{ size }}</option>
</select>
The second select menu's ng-disabled attribute is a simple expression which basically evaluates to "disable me if selection.item does not have a value". That could just as easily be a more complex expression or a function.
Here's a plunkr based on the code above