I've made a simple angular.js example which shows my problem: example
I want to set the start value of the select element to a specific value.
<select name="i" id="i" ng-model="selectedItem">
<option ng-repeat="i in items" value="{{i}}">{{i}}</option>
</select>
The options and the select element get rendered perfectly. But, like in the example, when i set the value in my controller to 6, the selected value on the page is still the first element.
scope.selectedItem = 6;
There are 2 simple buttons which just change the selected value. When you press them the selection change without problems.
EDIT: i updated the jsfiddle and removed unused code and renamed code to make things a bit more clear
EDIT2: I missed to ask if it is possible to fix the second select element too? The different is that this array contains objects instead of numbers.
<select name="o" id="o" ng-model="selectedItem">
<option ng-repeat="o in objects" ng-value="{{o.ID}}">{{o.Text}}</option>
</select>
You should not use ngRepeat to render option elements, it's not supposed to work properly with select and options. Use ngOptions which will work as expected with ngModel:
<select name="i" id="i"
ng-model="selectedItem"
ng-options="i for i in items">
</select>
For the second selectbox which has ngModel bound to ID property of the objects in array, it will be:
<select name="o" id="o"
ng-model="selectedItem"
ng-options="obj.ID as obj.Text for obj in objects">
</select>
Demo: http://jsfiddle.net/d3jf7ueq/9/
Related
I'm a little bit confused with Angular and ng-options.
I have a simple array and I want to init a select with it. But, I want that options value = label.
script.js
$scope.options = ['var1', 'var2', 'var3'];
html
<select ng-model="myselect" ng-options="o for o in options"></select>
What I get:
<option value="0">var1</option>
<option value="1">var2</option>
<option value="2">var3</option>
What I want:
<option value="var1">var1</option>
<option value="var2">var2</option>
<option value="var3">var3</option>
So I tried:
<select ng-model="myselect2" ng-init=0 ng-options="options[k] as v for (k,v) in options"></select>
<select ng-model="myselect3" ng-init=0 ng-options="b as b for b in options"></select>
(But it didn’t work.)
Edit:
My form is submitted externally, which is why I need 'var1' as the value instead of 0.
You actually had it correct in your third attempt.
<select ng-model="myselect" ng-options="o as o for o in options"></select>
See a working example here:
http://plnkr.co/edit/xEERH2zDQ5mPXt9qCl6k?p=preview
The trick is that AngularJS writes the keys as numbers from 0 to n anyway, and translates back when updating the model.
As a result, the HTML will look incorrect but the model will still be set properly when choosing a value. (i.e. AngularJS will translate '0' back to 'var1')
The solution by Epokk also works, however if you're loading data asynchronously you might find it doesn't always update correctly. Using ngOptions will correctly refresh when the scope changes.
You can use ng-repeat with option like this:
<form>
<select ng-model="yourSelect"
ng-options="option as option for option in ['var1', 'var2', 'var3']"
ng-init="yourSelect='var1'"></select>
<input type="hidden" name="yourSelect" value="{{yourSelect}}" />
</form>
When you submit your form you can get value of input hidden.
DEMO
ng-selected
ng-repeat
If you setup your select like the following:
<select ng-model="myselect" ng-options="b for b in options track by b"></select>
you will get:
<option value="var1">var1</option>
<option value="var2">var2</option>
<option value="var3">var3</option>
working fiddle: http://jsfiddle.net/x8kCZ/15/
you could use something like
<select ng-model="myselect">
<option ng-repeat="o in options" ng-selected="{{o==myselect}}" value="{{o}}">
{{o}}
</option>
</select>
using ng-selected you preselect the option in case myselect was prefilled.
I prefer this method over ng-options anyway, as ng-options only works with arrays. ng-repeat also works with json-like objects.
<select ng-model="option" ng-options="o for o in options">
$scope.option will be equal to 'var1' after change, even you see value="0" in generated html
plunker
I have this tempScale object defined in my controller:
$scope.tempScale = {
scaleType : [],
deviations : [],
intervals : 0
};
Which connects to my html:
<select id="scales" ng-model="tempScale.scaleType" class="form-control">
<option value="Manually Calculated" ng-selected="true">Manually Calculated</option>
<option value="Automatically Calculated">Automatically Calculated</option>
</select>
I added in the ng-selected=true so that manually calculated would be the first and selected option (basically a default option 1), however, when I run the page, my HTML looks like:
<select id="scales" ng-model="tempScale.scaleType" class="form-control ng-valid ng-dirty ng-touched">
<option value="? undefined:undefined ?"></option>
<option value="Manually Calculated" ng-selected="true" selected="selected">Manually Calculated</option>
<option value="Automatically Calculated">Automatically Calculated</option>
</select>
Why are those ng classes appearing on load, and where is this undefined option value coming from? It's not a loop, so I'm baffled.
You do not need ng-selected. Set the model from the controller as $scope.tempScale.scaleType='Manually Calculated';.
One cannot set a default selected item when using ng-model directive with select element. The select element is bind to model field, which data is undefined. What value select should display? Yes, undefined. You try to pass data via markup, it is not an Angular way.
Just keep your data in JS model, not in HTML markup.[Ref]
Plunker demo
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
};
I am trying to get some cascading drop downs in angular that populate based off of what the previous drop down has selected. So basically there are 5 drop downs total, at first only the first drop down would be populated, and then the second one would populate based off of what is picked in the first (hopefully using $http to get the new info back form server base don what is picked) and so on all the way down to 5.
So basically I have this :
<select class="selectScope" ng-model="scope1">
<option ng-repeat="obj in array" value="{{obj.id}}">{{obj.name}}</option>
</select>
<select class="selectLevel1" ng-model="scope2">
<option ng-repeat="obj in array" value="{{obj.id}}">{{obj.name}}</option>
</select>
<select class="selectLevel2" ng-model="scope3">
<option ng-repeat="obj in array" value="{{obj.id}}">{{obj.name}}</option>
</select>
<select class="selectLevel3" ng-model="scope4">
<option ng-repeat="obj in array" value="{{obj.id}}">{{obj.name}}</option>
</select>
<select class="selectLevel4" ng-model="scope5">
<option ng-repeat="obj in array" value="{{obj.id}}">{{obj.name}}</option>
</select>
I will have populate the first dropdown with an $http, but without going into detail I am just wondering if I can have the dropdowns trigger off each other. If i have selected all the way down to level 5 and I re-select level 3 - then 4 and 5 would empty (4 would re populate based on what was picked in 3). SO I just want them to work off each other. I am wondering if something like this is possible in angular. Apologies if this is a bit oblivious, I am brand new to using angular. Thanks!!
Firstly, you should be using ng-options instead of an ng-repeat
<select ng-model='scope1' ng-change='scope1Change()'
ng-options='obj.id as obj.name for obj in array'>
</select>
Then, on the ng-change event of the select, you can load the appropriate data for the following selects.
$scope.scope1Change = function() {
//Build URL based on selection
$http.get(myUrl).then(function(data){
//transform data if required
$scope.array2 = data;
});
}
You can keep the other select statements disabled based on previous values being selected
<select class="selectLevel1" ng-model="scope2"
ng-options='obj.id as obj.name for obj in array2' ng-disabled='!scope1'>
</select>
You would need some additional logic in the change events to work out whether or not you should clear the $scope model values as required, but that is pretty straightforward
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