I'm working on angularjs app, and I can't find the answer for simple question. I've got an select with ng-options, when array that is set for options has more then one object inside the select is empty on start, but when array has only one element it automatically set it as default value. I need this select to be empty at the begining all the time, is there any solution?
in angularJS you may separate the variable used to fill in your options values and the model that stores your selected value.
See that example :
//Model used to store selected values
<select class="form-control" ng-model="myModel.country">
//I have a $scope.countries array of country
<option ng-repeat="country in countries" ng-value="country" required>{{country.name}}</option>
</select>
Related
building an app that retreives data from a database.
Created 2 dependable dropdowns
1.Categories
2. branches
all select options are coming from a json tree (Array in an Array) that is fetched by a service(Categories).
in controller i fetch json with :
$scope.categories = Categories.query();
in html i try below code:
<select class="form-control" name="category" ng-model="params.category" ng-options="item as item.name for item in categories track by item.category">
</select>
<select class="form-control" name="branch" ng-model="params.branch" ng-options="branch as branch.name for branch in categories[params.category].branches track by item.category.branch">
</select>
Dropdown 1. Categories fetched ok but Dropdown 2. branches doesnt work.
Can you guide??
Since you have an array of arrays, I think the params.category variable will hold a reference to an array, so you can't use it in the second select with categories[params.category] because you need to use the index and not the reference. I suggest you try: categories[categories.indexOf(params.category)].
EDIT:
Since I don't know what your categories array looks like, and what a branch array looks like, I can only guess according to your code. IF your data structure is similar to what I think - here is a working plunker.
The main idea is that if an element inside your categories array is an object and has a branches property, then after you put a reference to it in $scope.params.category than you can just access the branches property using dot notation (no need to go back to the categories array).
I have a lot of select boxes in my application, being generated by lists of data and assigned to various ng-models.
I want to set the ng-model value to the first available option (respecting filters) of all select inputs globally in the app.
So for example a select input like this:
<select ng-model="entry.employee">
<option ng-value="employee.name" ng-repeat="employee in employees | filter:active">{{employee.name}}</option>
</select>
The entry.employee ng-model defaults to null, I need every select box to never be null but always select the first valid option of a select input by default.
It needs to be global as well and be generic enough to work with any type of select input.
Here is the data:
$scope.employees= [
{'name':'Bill'},
{'name':'Frank'},
{'name':'Ted'},
];
Instead of using ng-repeat on option elements use directly ng-option on select tag.
for example
<select class="form-control" ng-options="item.name for item in employees track by item.id" ng-model="selectedItem"></select>
in you controller use:
$scope.selectedItem=$scope.employees[0];
your object would be like:
$scope.employees= [
{id:'1','name':'Bill'},
{id:'2','name':'Frank'},
{id:'3','name':'Ted'},
];
In this case let you select tags be 'n' numbers but whenever you want you ng-model to be the first one just initialize it with the first element in your Object.
Also there is a good thing using ng-option is whenever you want to change the value of the select element at runtime you just need to update the selectedItem element.
Hope this resolves your query
I have the code listed below which works fine, however when i attempt to add ng-model and related ng-change to the select, an empty option is added. I understanding why, it is because on init the selectedOption for ng-model is empty.
What I want to do is set a default value so when I can use ng-change to set options IsSelected value to true when user selects it. I'm just not sure how to go about this, I have no issues doing this when I'm working with a static generated select list, but for some reason I can't figure it out for this dynamic generated list.
Any input is appreciated!
<div ng-repeat="optionType in productDetailModel.OptionTypes">
<select name="{{optionType.OptionTypeName}}">
<option ng-repeat="option in optionType.Options"
value="{{option.OptionValue}}">{{option.OptionValue}}
</option>
</select>
</div>
Here's plunkr I mocked to give a basic idea of what I have in mind: http://plnkr.co/edit/xBDfc0XzDwsF0mBiFZOv?p=preview
The initial option is blank because the model is initially undefined.
As tymeJV said, initializing your scope inside of your .js will define a default value that will be shown as selected initially.
$scope.modelName = $scope.optionType.Options[0];
It might be helpful to use ng-options instead of ng-repeat. One reason why it might be beneficial is that ng-options does not create a child scope (unlike ng-repeat). This could help simplify linking to your model and avoid confusion.
<select name="{{optionType.OptionTypeName}}" ng-model="modelName" ng-options="option for option in optionType.Options">
</select>
This article covers the basics of ng-options as well as discusses why it would be used as opposed to ng-repeat.
Hope this helps.
Use ng-options when using a select!
<select name="{{optionType.OptionTypeName}}" ng-model="someModel" ng-options="option as option for option in optionType.Options>
</select>
And then set the ngModel to the default option you want selected:
$scope.someModel = $scope.optionType.Options[0]
There is one directive of select element is ng-init but it call once while first time rendering, but if you change the options dynamically then it will not call again. So for that you need to set the model field with value in scope just below of your new option population logic.
$scope.modelName = $scope.Options[0]; // if array
$scope.modelName = $scope.Options[key]; // if Json Object
I want use select in angularjs.
I have a json that every element have 2 part: name and value. I want show name in dropdown and when user select one of theme, value is copy to ng-model.
$scope.list = [{name:"element1",value:10},{name:"element2",value:20},{name:"element3",value:30}];
For this I have 2 way to use select:
ng-options:
I use ng-options like below:
<select ng-model="model.test" ng-options="element.name for element in list"></select>
It's work correctly, but when I select each of element, I want just value of element is copy to ng-model, but a json is copy to ng-model, like below:
$scope.model.test = {name:"element1",value:1}
I can resolve this problem in angular controller, but I want find a better way that resolve this problem.
For resolove this problem, I use second way:
2.use ng-repeat in options:
<select ng-model="model.test">
<option ng-repeat="element in list" value="{{element.value}}">{{element.name}}</option>
</select>
In second way, just value is copy to ng-model, but as a string type:
$scope.model.test = "10";
I use below code, but all of them return a string value to model.
<option ng-repeat="element in list" value={{element.value}}>{{element.name}}</option>
<option ng-repeat="element in list" value="{{element.value}}|number:0">{{element.name}}</option>
<option ng-repeat="element in list" value={{element.value}}|number:0>{{element.name}}</option>
How can fix this problem?
you can resolve it with ng-options as well
ng-options="element.value as element.name for element in list"
please read this blog to understand more about ng-options.
Also another advantage of ng-options is, it binds the object as opposed to json string in case you want to attach the selected object to ng-model.
Have you tried this :
<select ng-model="model.test" ng-options="element.value element.name for element in list"></select>
btw, if you may have hundreds of records into your list, you should create your own directive, where you would manipulate your DOM with a simple javascript for loop
ng-repeat will be slow to be rendered,
ng-options adds every record into $watch.
In Angular 1.2.11, given a controller with:
$scope.produce = { 'apples' : [{ 'variety' : 'granny smith', 'price': 2.00}] }
And a view with
<select ng-model='fruits'>
<option value="0">More Fruits...</option>
<option ng-repeat="p.apple for p in produce" value="p">{{ p.variety }}</option>
</select>
How can I bind 'p' to the value attribute? If I try as above the model is bound as a JSON string, not as the model itself (as it would be if I were able to use ng-options).
I'm working around this now by using an ng-change function that uses the value bound to fruits as a lookup in $scope.produce, but this seems like a workaround rather than a solution.
EDIT: Sorry I wasn't more clear about this: I need to be able to hard code 1+ options into the select list, so using ng-options is not a solution.
Here are some fiddles to help illustrate my problem:
** Using ng-options **
ng-options allows for one element that it uses for creating a default option for use as a label. Two problems with this: if I try to use that <option> for its intended purpose I can't add a second option to the select. On the other hand, if I just try to add one <option> element, it gets placed at the top of the <select> list. No good.
** Using ng-repeat **
I'm unable to bind the model to the value attribute of the <option> element. Instead, the value is stringified JSON, which is not bindable.
You need to use ng-options:
<select ng-model='fruits' ng-options="thisFruit.variety in apples">
</select>
If you need to have an option selected as a default (your "More Fruits" option) then you need to add that to the data before it gets to the repeater, and also set your model $scope.fruits = 0 to make that selection selected by default.