I'm currently dealing with an input field that looks like this:
<input type="text" class="form-control pull-right" ng-model="ceremony.CeremonyFee | number:2">
Although it is displaying correctly, I've noticed that it's disabled. The error message I'm getting is "[ngModel:nonassign] Expression 'ceremony.CeremonyFee | number:2' is non-assignable". While I understand why this error occurs, I'm unsure how to resolve it for an input field. Any help would be greatly appreciated. Thank you.
input with ng-model is typically used for entering data, while the number filter is commonly used for displaying data. Since filter values cannot be bound, they are not compatible in this context. It's important to determine the purpose of the input element.
If you want the user to input their own number that needs validation, consider using the pattern attribute:
<input type="text" ng-model="ceremony.CeremonyFee" pattern="[0-9]+(.[0-9]{,2})?">
If you want the input to display a calculated value without user input, avoid using ng-model and instead use value:
<input type="text" value="{{ceremony.CeremonyFee | number:2}}" readonly>
Having trouble understanding your requirements, but if you simply want users to input two digits only, consider using basic HTML attributes like `min`, `max`, and `step`.
Here is a JavaScript solution, although not recommended:
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 needs a viewmodel assignable (or bindable) property, so adding a pipe won't work here.
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>An error message indicates that there is a 'non-assignable' expression in the ng-model attribute.
To resolve this issue, ensure you are only using ceremony.CeremonyFee.
The use of "|" in ng-repeat specifies which expression should be used as a filter.
If you want to pre-populate the <input> with initial data in your controller or link function, assign it an initial value like so:
$scope.ceremony = {
CeremonyFee: 'My first ceremony'
}
Whenever the data in your <input> element changes, the CeremonyFee will also be updated accordingly.
I came across and successfully implemented the solution provided on this website.
http://jsfiddle.net/k7Lq0rns/1/
'use strict';
angular.module('induction').$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));
});
}
};
}]);
It was relatively simple to implement.
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