In the controller if have a variable that tracks the index (starting at 0) of the page for a pagination table:
var page {
pageNumber: 0;
}
Question: how can I show this pageNumber variable in the html, but always incremented by +1? (as the index=0 page is obviously the 1st page and should thus be shown as Page 1)
<input type="text" ng-model="page.pageNumber">
Also, when the model gets updated, the value in the input should automatically change (again: also incremented by +1).
I think this is a use-case for $formatters and $parsers. They operate on the model's property and there is no need to create a dummy property on the model. Documentation here. Please correct me if this is not the use case for $formatters and $parsers.
Please see below.
HTML markup
<body ng-app="app" ng-controller="mainCtrl">
{{page}}
<input paginated-index type="text" ng-model="page">
</body>
js
var app = angular.module('app', []);
app.controller('mainCtrl', function($scope) {
$scope.page = 0;
});
app.directive('paginatedIndex', function()
{
return{
restrict: 'A',
require: 'ngModel',
link: function(scope, element, attrs, ngModelController)
{
ngModelController.$formatters.push(function(value)
{
return value+1;
})
ngModelController.$parsers.push(function(value)
{
return value-1;
})
}
}
});
In your controller, change your page object to this:
$scope.page = {
displayedPage: function(num) {
if(arguments.length) {
$scope.page.pageNumber = num - 1;
return num;
} else {
return $scope.page.pageNumber + 1;
}
},
pageNumber: 0
}
And then yourelement to this:
<input type="text" ng-model="page.displayedPage" ng-model-options="{ getterSetter: true}" />
This will display the page number plus 1, but leave the actual page.pageNumber variable the way it should be.
The getterSetter: true options I've added in will bind the model to a getter/setter function, which allows you to pass in the argument - in this case, your entered page number - and return from that function. You can read more information on this in the documentation for ngModel
you can try using something like this.
$scope.data=$scope.page.pageNumber+1;
$scope.fuc=function(){
$scope.page.pageNumber=$scope.data-1;
};
and your Html will be like
<input type="text" ng-model="data" ng-change="fuc()" >
check this plunk Plunker
Related
I created a directive to add some content whenever the button "add" is clicked. But I don't know how to get all values in these new inputs.
HTML Code
angular.module('myApp', [])
.controller('myController', function() {
})
.directive('addContent', function($document, $compile) {
return {
restrict: 'A',
replace: false,
link: function(scope, element, attr) {
element.on('click', function() {
var newcontent = '<input type="text" ng-model="myModel"><br>';
angular.element($document[0].querySelector('.newcontent')).append($compile(newcontent)(scope));
})
}
}
})
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div class="newcontent" ng-app="myApp" ng-controller="myController">
<button type="button" add-content>Add</button><br><br>
</div>
So, how can I set a different ng-model value to each one new input that is created and, how can I get this values in my controller?
You could go with something like this:
The Idea:
A base name can be defined from the html where the directive is being applied.
An incremental number is used in the directive when creating new inputs (the view controller (programmer) where this model is used must be aware of that). Actually, you could use any other strategy you'd prefer better in this case. I've used this one for simplicity and stating my point.
The code (see below snippet):
In the directive
Create a counter for incrementing as new inputs are added: var count = 0;
Take the base name specified in the html with var model = scope.$eval(attr['addContent']);
Modify the newcontent variable to use that base name and the incremental counter like this: var newcontent = '<input type="text" ng-model="' + model + (count++) + '"><br>';
The controller
For organization, create a variable for holding the base name: $scope.buttonModel = 'buttonModelReference';
Access the value of those new models like this: $scope[$scope.buttonModel + $scope.index] where $scope.index is the index of the input (where 0 is the first input created)
The view
Use the modified directive like this add-content="buttonModel" where buttonModel is the variable defined in the controller.
Plus code (for demonstration purposes only)
The showModel function shows the value of one (dynamic created) input passing as reference the index of the input (0 zero is the index of the first input created)
The Snippet
angular.module('myApp', [])
.controller('myController', function($scope) {
$scope.index;
$scope.buttonModel = 'buttonModelReference';
$scope.showModel = function() {
console.log($scope[$scope.buttonModel + $scope.index]);
}
})
.directive('addContent', function($document, $compile) {
var count = 0;
return {
restrict: 'A',
replace: false,
link: function(scope, element, attr) {
element.on('click', function() {
var model = scope.$eval(attr['addContent']);
var newcontent = '<input type="text" ng-model="' + model + (count++) + '"><br>';
angular.element($document[0].querySelector('.newcontent')).append($compile(newcontent)(scope));
})
}
}
})
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div class="newcontent" ng-app="myApp" ng-controller="myController">
<button type="button" ng-click="showModel()">showModel</button> <input ng-model="index" type="number" placeholder="select the model index starting from 0" /> <br><br>
<button type="button" add-content="buttonModel">Add</button><br><br>
</div>
I am trying to make a directive for an input to limit the value between 1-99. On the same input I also have another directive that converts the value to a percentage and am not sure if that is what is getting in the way.
The directive is simple (taken basically from the Angular website):
(function() {
'use strict';
angular
.module('app.model')
.directive('inputRange', inputRange);
function inputRange() {
return {
require: 'ngModel',
restrict: 'A',
link: function(scope, elm, attrs, ctrl) {
var INTEGER_REGEXP = /^-?\d+$/;
ctrl.$validators.inputRange = function(modelValue, viewValue) {
if (ctrl.$isEmpty(modelValue)) {
// consider empty models to be valid
return true;
}
if (INTEGER_REGEXP.test(viewValue)) {
// it is valid
return true;
}
// it is invalid
return false;
};
}
}
}
});
And the section of html with the input field (which is paired with a slider):
<form name="form">
<div sc-slider
ng-model="vm.baseline"
min="0.01"
max="0.99"
initial="{{vm.baseline}}"
step="0.01"
uib-tooltip="The initial estimate of the KIQ's likelihood - prior to any indicator observations."
tooltip-popup-delay="200"
tooltip-popup-close-delay="200"
tooltip-placement="bottom"></div>
<input to-percent
input-range
name="baseline"
style="text-align:center;"
type="text"
min="1"
max="99"
class="form-control"
ng-model="vm.baseline"></input>
<span ng-show="form.baseline.$error.inputRange">The value is not a valid integer!</span>
<span ng-show="form.baseline.$error.min || form.baseline.$error.max">
The value must be in range 1 to 99!</span>
</form>
I have read on SO about priority for directives that share an input but I don't think that is necessarily an issue here. But when I enter a value greater than 99 I'd expect one of the spans below to show up, but nothing is appearing. And my other directive works fine all of the time. Any help is appreciated.
Make your life easier and use ng-max and ng-min attributes on the input element.
I have the following input field
<input type="text" class="form-control pull-right" ng-model="ceremony.CeremonyFee | number:2">
it is showing up correctly but has been disabled. The error I am receiving is "[ngModel:nonassign] Expression 'ceremony.CeremonyFee | number:2' is non-assignable". I understand why it is in error, but do not know how to get this to work on an input field. Thanks.
input with ng-model is for inputting data, number filter is for displaying data. As filter values are not bindable, they are not compatible, as you can see. You have to decide what you want to do with that input.
Do you want it to be an input? User can input his own number and you only needs to validate? Use i.e. pattern attribute:
<input type="text" ng-model="ceremony.CeremonyFee" pattern="[0-9]+(.[0-9]{,2})?">
Do you want it to be an output? User does not need to input his own value? Do not use ng-model, use value instead:
<input type="text" value="{{ceremony.CeremonyFee | number:2}}" readonly>
UPDATE:
really I don't understand what you need, but, if you want just that users can insert only two digits you should use a simple html attributes, have a look on min, max, step...
Follows a pure js solution, but I don't suggest something like that!
angular.module('test', []).controller('TestCtrl', function($scope) {
var vm = $scope;
var testValue = 0;
Object.defineProperty(vm, 'testValue', {
get: function() { return testValue; },
set: function(val) {
val = Number(val);
if(angular.isNumber(val) && (val < 100 && val > 0)) {
console.log(val);
testValue = val;
}
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<section ng-app="test">
<div ng-controller="TestCtrl">
<input style="display:block; width: 100%; padding: 1em .5em;" type="number" ng-model="testValue" />
</div>
</section>
the ng-model directive requires a viewmodel assignable (or bindable) property, so, you cannot add a pipe...
angular.module('test', [])
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="test" ng-init="testValue = 0">
<label ng-bind="testValue | currency"></label>
<input style="display:block;" ng-model="testValue" type="number"/>
</div>
As an error states you have got an 'non-assignable' expression in your ng-model attribute.
You should use only ceremony.CeremonyFee.
| is used on ng-repeat to indicate what expression should be used as filter.
If you want to have that <input> populated with initial data in your controller/link you should give it an initial value ex.
$scope.ceremony = {
CeremonyFee: 'My first ceremony'
}
And every time your <input> element data will be changed CeremonyFee will be updated as well.
I found and used the solution found on this page.
http://jsfiddle.net/k7Lq0rns/1/
'use strict';
angular.module('induction').$inject = ['$scope'];
angular.module('induction').directive('format',['$filter', function ($filter) {
return {
require: '?ngModel',
link: function (scope, elem, attrs, ctrl) {
if (!ctrl) return;
ctrl.$formatters.unshift(function (a) {
return $filter(attrs.format)(ctrl.$modelValue)
});
elem.bind('blur', function(event) {
var plainNumber = elem.val().replace(/[^\d|\-+|\.+]/g, '');
elem.val($filter(attrs.format)(plainNumber));
});
}
};
}]);
relatively easy to apply it.
I've got a UI page setup through Angular, and I'm trying to take advantage of the built in ng-maxlength validator on an input element. Long story short, I know about $scope.form.$error and how that object has a maxlength property in the case that the validation fails. But I want to display an error message specific to the character length that was violated, and I don't see anywhere that the length that I specified was stored on this object. Does anyone know if it's possible to access this, so I don't have to write out a separate error message for each input that has the max length violated?
EDIT: To answer your question, yes angular does store a boolean value in the $error object that is accessible to your via the key(s) that are set in the object. In the case of the code I provided below and in th jsFiddle, we are setting the key for angular, and the value of either true or false.
Be mindful when setting the value as it is reversed. ex. $setValidity( true ), flips the $error to false.
Ok, here is what I think you were looking for...
In Angularjs v1.2.13 you will not have access to ng-message or the $validator pipeline,
which is why are are using $formatters and $parsers.
In this case, I am using named inputs, but perhaps in your case you need dynamic input names?
Plus, if you are using inputs but no form, then getting the error message to display would have to be done with a separate custom directive.
If so, then please look here for dynamically named input fields for some help.
dynamic input name in Angularjs link
Let me know if this works; I'll make changes as needed to HOOK YOU UP!
In case you don't know, you can write over Angular's maxlength for each individual input.
If you changed 'maxlength' in the updateValidity() function in the directive below, to something like 'butter', then $scope.form.inputname.$error would be something like
$scope.formname.inputname.$error { butter: true }
if you also used ng-maxlength="true", then it would be
$scope.formname.inputname.$error { butter: true, maxlength: true }
Another example if you used ng-maxlength, and capitalized the 'maxlength' in the directive to 'Maxlength'
Then you would get
$scope.formname.inputname.$error { maxlength: true(angular maxlength), Maxlength: true(your maxlength)
And of course if you name it the same, then yours writes over angulars
$scope.formname.inputname.$error { maxlength: true };
The point is YOU can add your own names to the angular $error object; you can write over Angular's; and you can just use what Angular gives you when you use Angular's directives: like ng-required="true", or ng-maxlength="true"
Link to YOUR angularjs version on jsFiddle
jsFiddle LInk
<div ng-app="myApp">
<form name="myForm">
<div ng-controller="MyCtrl">
<br>
<label>Input #1</label>
<br>
<input ng-model="field.myName" name='myName' my-custom-length="8" />
<span ng-show="myForm.myName.$error.maxlength">
Max length exceeded by {{ myForm.myName.maxlength }}
</span>
<br>
<br>
<label>Input #2</label>
<br>
<input ng-model="field.myEmail" name='myEmail' my-custom-length="3" />
<span ng-show="myForm.myEmail.$error.maxlength">
Max length exceeded by {{ myForm.myEmail.maxlength }}
</span>
</div>
</form>
</div>
var app = angular.module('myApp', []);
app.controller('MyCtrl', function ($scope) {
$scope.field = {};
});
app.directive("myCustomLength", function () {
return {
restrict: 'A',
require: 'ngModel',
link: function (scope, element, attrs, ctrl) {
if (!ctrl) { return } // ignore if no ngModel controller
ctrl.$formatters.push(validateInput);
ctrl.$parsers.unshift(validateInput);
function validateInput(value) {
if (!value) {
updateValidity(false);
return;
}
inputLength(value);
var state = value.length > attrs.myCustomLength;
updateValidity(state);
}
function inputLength(value) {
ctrl.maxlength = null;
var length = value.length > attrs.myCustomLength;
if (length) {
ctrl.maxlength = (value.length - attrs.myCustomLength).toString();
}
}
function updateValidity(state) {
ctrl.$setValidity('maxlength', !state);
}
} // end link
} // end return
});
CSS Here if you need it.
input.ng-invalid {
border: 3px solid red !important;
}
currently I'm using a custom directive which wraps the ng-minlength and ng-maxlength directives to apply the values of these directives to the model of the input. I need to do this because I'm creating a validation service which uses the angular $error object on a form to return a user friendly message about what's wrong. The problem is, when it comes to min and max lengths, I want to be able to tell the user what the length should be. I've got this working by using the following method
directive('minlength', ['$compile', function ($compile) {
return {
restrict: 'A',
require: 'ngModel',
compile: function compile(tElement) {
tElement.attr('ng-minlength', tElement.attr('minlength'));
tElement.removeAttr('minlength');
return {
post: function postLink(scope, elem, attrs) {
var keys,
form,
field = attrs['ngModel'];
$compile(elem)(scope);
for (keys in scope) {
if (scope.hasOwnProperty(keys)) {
if (keys.substring(0, 2).indexOf('$') < 0) {
if (keys !== 'this') {
form = keys;
break;
}
}
}
}
if (form) {
console.log(attrs);
scope[form][field]['minlength'] = attrs['minlength'];
}
}
}
}
}
}])
But this seems a bit longhanded and possibly difficult to maintain and test. Is there a better way to do this?
If you want just to inform the user about the min and the max:
var app = angular.module('myApp',[]);
app.controller('MyCtrl',function($scope){
$scope.minValue = 5;
$scope.maxValue = 10;
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myApp">
<div ng-controller="MyCtrl">
<form name="myForm">
Last name: <input type="text" name="lastName" ng-model="user.last"
ng-minlength="{{minValue}}" ng-maxlength="{{maxValue}}">
<span class="error" ng-show="myForm.lastName.$error.minlength">
Should be {{minValue}} charachters long</span>
<span class="error" ng-show="myForm.lastName.$error.maxlength">
No more than {{maxValue}} characters please</span><br>
</form>
</div>
</div>