I am developing application using AngularJS and ASP.Net MVC...
In my view, I have used ng-repeat=u in users in a div. Inside it, I set the ng-model in a textbox as ng-model=u.fName where fName is database field.
My question is, how I can represent the ng-model=u.fName in the angular controller??
For example, I tried to use $scope.n.fName but it doesn't work.
Note that u is only existing in ng-repeat block.
If you want to show/access to value changed by textbox outside of block, you should access via users again with another ng-repeat block:
<li ng-repeat="u in users">{{u.fName}}</li>
Or add ng-change="change(u)" to your textbox to get u anytime it's changed.
<input ng-model="u.fName" ng-change="change(u)" />
Plunkr example
Related
I am new to angular-js and i think this is a basic question how to get the value from a paragraph tag in angular-js? I tried with using ng-model but doesn't giving the value.Can anyone help me?
ng-model is working for two way binding. p tag is not supported for ng-model. if you want to bind p tag then you can use ng-bind or {{}}.
<p ng-bind="test"></p>
plunker code here with ng-bind
No. You can not use ng-model for <p> tag. If you want to show the value of scope variable inside <p> tag, Then you can use expressions.
Example
<p> {{ variable }} </p>
This will show the value of variable into paragraph.
Ng-model is not supported for P,H tags,,,
if you want to bind tags then use ng-class
<p ng-class="localUser.yourdata">{{localUser.yourdata}}</p>
<h1 ng-class="localUser.yourdata">{{localUser.yourdata}}</h1>
hope this is help full
You can only directly mutate that ng-model in the controller to which the view is binded via an input tag. You could use {{}} or ng-bind for one way binding, from controller to view. But to achieve two way data binding you need an input tag or other alternatives like select.
In your case if you want to read changes inside other tags like p tags you need to watch those tags inside the scope, using $scope.$watch and listen for updates have a callback function execute on change.
So basically you can't achieve what your trying to do here. This is because p tags have static values and they do not change, so one way data binding is the best option here, from controller to view during the initialization of that tag. No point, later, would you be able to change the value inside the p tag, thus no need for two data binding here. Thus ng-model is not supported. Only ng-bind or {{}}.
I'm trying to implement a multilingual text input field with a little dropdown button to the left for selecting the language. For instance, when the dropdown menu shows 'de' the text field should be bound to model.multilingualData['de'].someField and so on.
My first approach was to set ngModel to model.multilingualData[selectedLanguage].someField. But when the user selects a different language without filling in the field correctly, no error is set on the form, because the model now points to a different object.
My next idea was to create an entire element directive without ngModel, but then I wouldn't be able to do other validations like ngMaxLength.
I couldn't find anything helpful on the web either. Any idea on how to implement this properly?
EDIT
Here's a little fiddle that illustrates the problem: http://jsfiddle.net/FZ2kg/
Not only that the form appears valid when you switch languages, the previous field value is also deleted, because the model is set to null when the field becomes invalid.
would be nice if you use this awesome external directive for multilanguage!
https://angular-translate.github.io/
I hope it helps
If you need to have form validation for all language variations and you're loading all languages at once in your model, can't you just create an input per language in the form and hide all but the currently selected language?
Here's a fiddle: http://jsfiddle.net/jvl70/w3rstmwd/5/
<form name="myForm">
<div ng-repeat="(lang, value) in model.multilingualData"
ng-show="lang==stuff.currentLanguage">
<ng-form name="innerForm">
<div ng-class="{ 'has-error': innerForm.anything.$invalid }">
<input type="text" name="anything" ng-model="value.someField" ng-maxlength="6"/>
</div>
</ng-form>
</div>
</form>
(At first I tried to use dynamic names for each input but found that the individual field $invalid wasn't available for dynamically named inputs. See this post to get around it: Dynamic validation and name in a form with AngularJS.
As an alternative to ng-form, you could use dynamic names for each input and try one of the custom directives on the link.)
I guess if there were many possible languages, this approach might get slower but it's ok for a few languages.
I'm building an AngularJS app and I have ran into an issue. I have been playing with the framework for a while and I have yet to see documentation for something like this or any examples. I'm not sure which path to go down, Directive, Module, or something that I haven't heard of yet...
Problem:
Basically my app allows the user to add objects, we will say spans for this example, that have certain attribute's that are editable: height and an associated label. Rather than every span have its own dedicated input fields for height and label manipulation I would like to use one set of input fields that are able to control all iterations of our span object.
So my approx. working code is something like this:
<span ng-repeat="widget in chart.object">
<label>{{widget.label}}</label>
<span id="obj-js" class="obj" style="height:{{widget.amt}}px"></span>
</span>
<button ng-click="addObject()" class="add">ADD</button>
<input type="text" class="builder-input" ng-model="chart.object[0]['label']"/>
<input type="range" class="slider" ng-model="chart.object[0]['amt']"/>
The above code will let users add new objects, but the UI is obviously hardcoded to the first object in the array.
Desired Functionality:
When a user clicks on an object it updates the value of the input's ng-model to bind to the object clicked. So if "object_2" is clicked the input's ng-model updates to sync with the object_2's value. If the user clicks on "object_4" it updates the input's ng-model, you get the idea. Smart UI, essentially.
I've thought about writing a directive attribute called "sync" that could push the ng-model status to the bound UI. I've though about completely creating a new tag called <object> and construct these in the controller. And I've thought about using ng-click="someFn()" that updates the input fields. All of these are 'possibilities' that have their own pros and cons, but I thought before I either spin out on something or go down the wrong road I would ask the community.
Has anyone done this before (if so, examples)? If not, what would be the cleanest, AngularJS way to perform this? Cheers.
I don't think you need to use a custom directive specifically for this situation - although that may be helpful in your app once your controls are more involved.
Take as look at this possible solution, with a bit of formatting added:
http://jsfiddle.net/tLfYt/
I think the simplest way to solve this requires:
- Store 'selected' index in scope
- Bind ng-click to each repeated span, and use this to update the index.
From there, you can do exactly as you proposed: update the model on your inputs. This way of declarative thinking is something I love about Angular - your application can flow the way you would logically think about the problem.
In your controller:
$scope.selectedObjectIndex = null;
$scope.selectObject = function($index) {
$scope.selectedObjectIndex = $index;
}
In your ng-repeat:
<span ng-repeat="widget in chart.object" ng-click="selectObject($index)">
Your inputs:
<input type="text" class="builder-input" ng-model="chart.object[selectedObjectIndex]['label']"/>
<input type="range" class="slider" ng-model="chart.object[selectedObjectIndex]['amt']"/>
Normally, with a form and input fields, the form controller is published into the related scope under the form name attribute. And, the NgModelController is published under the input name attribute.
So for an input field with an ngModel directive, the NgModelController for the input field can be retrieved like $scope.myFormName.myInputFieldName
The question is how to do the same thing (get the NgModelController) for input fields inside the ngRepeat directive?
I would like to name the input fields using $index as part of the name so each template instance is uniquely named. This renders OK, so
<input name="foo_{{$index}}" ...
renders the instance with $index == 3 to
<input name="foo_3" ...
But trying to get the ngModelController via the published names does not work (it's undefined), e.g.:
$scope.myFormName.foo_3
A plunker showing this is here: http://plnkr.co/edit/jYDhZfgC3Ud0fXUuP7To?p=preview
It shows successfully getting the ngModelController for a 'plain' input element and calling $setValidity, and also shows failing to get the ngModelController for an input element inside an ngRepeat directive.
Copied the relevant section of code from the plunker below:
<div ng-repeat="element in elements">
<div ng-class="{error: form['foo_{{$index}}'].$invalid}">
<input name="foo_{{$index}}" ng-model="element.a" type="number">
<span ng-show="form['foo_{{$index}}'].$error.bar">ngRepeat bar invalid</span>
</div>
</div>
{{form.foo_0.$setValidity('bar', false)}}
#Flek is correct that the new child scopes that ng-repeat creates are the root of the problem here. Since browsers do not allow nesting of <form> elements, ngForm must be used when nesting forms, or when you want to do form validation inside ngRepeat.
See Pawel's answer on the google group thread, which shows how to use ng-form to create inner forms, and/or #blesh's SO answer.
If i understand your question correctly, you are trying to have access to the form elements created inside the ng-repeat.
Please have a look at this fiddle http://jsfiddle.net/EF5Jp/. Inside the button click handler you will have the access to the element with id myForm.foo_2. You can notice that the element is retrieved by myForm.foo_2 and not $scope.myForm.foo_2. Second thing is, changing the value using its scope and not using its value property like angular.element(element).scope().foo = 6;.
I can easily bind data to a div or pre tag with the code:
<div id="json_route{{route.id}}" ng-bind="items.route{{route.id}} | json"></div>
However, I want to try and bind this data to a hidden form input, I tried:
<input type="hidden" name="json_route{{ route.id }}"
ng-model="items.route{{route.id}} | json" />
Which returns me an error of:
Error: Non-assignable model expression: items.route2 | json (<input type="hidden" name="json_route2" ng-model="items.route2 | json">)
So obviously I cannot use | json when using ng-model. The angular docs are still a bit sparse and I can't seem to find how to assign this correctly, even if I can? Thanks :)
I need to get this json data loaded into my pyramid application, and assigning it into a hidden form field seemed the best way todo it, or should I be doing this in a different way?
"To be able to render the model into the view, the model has to be able to be referenced from the scope." (src: Angular Guide).
Angular needs to be able to reference the value in your ngModel expression to a $scope variable in your controller.
With ng-bind it worked, because ng-bind is not the same as ng-model. ngBind simply takes your expression and evaluates it inside the current scope and than replaces the text of the host element with the result. As Guide tells us, the value of ng-model must be an assignable angular expression to data-bind to.
To have your hidden input contain the json string representation of your 'items.route2' model you could setup a $watch expression in your controller which would "prepare" the json string of your model whenever it changes. See plnkr example.
Try using ng-init:
<input type="hidden" name="..." ng-model="items.route{{route.id}}"
ng-init="items.route{{route.id}} = data_from_server_here">
See also https://stackoverflow.com/a/12657601/215945.