I'm new to angular and trying my hand at directives.
I would like to be able to use
<div ng-messages="form.$error">
<div ng-message="required">You did not enter a field</div>
</div>
Within a custom directive like so,
<div class="form-group">
<label class="form-label" for="s-input-{{name}}">
{{text.human}}
<span ng-if="text.subtext" class="form-hint">{{text.subtext}}</span>
</label>
<select ng-required="required" ng-model="model" class="form-control" id="s-input-{{name}}" name="{{name}}" ng-options="t for t in text.select"></select>
<div ng-messages="form.$error">
<div ng-message="required">You did not enter a field</div>
</div>
</div>
I can get it to work by passing using ng-messages below the directive element but not in it.
Although I really can't figure out how to pass the form in to the template so it can be accessed by ng-messages.
I've set up a plunker to show you my bare bones setup.
http://plnkr.co/edit/ELx6Fd2eLN4CJjEnzRGM?p=preview
I know I need to require the form with require: '^form', although I'm not sure how to use/access in the template URL.
I've been banging my head for a while so would really appreciate some help! Thanks.
When you require the form directive with require: '^form' you then access that FormController in the link function. You can then simply attach that controller to the directive's scope like so:
link: function(scope, element, attributes, formController) {
scope.form = formController;
}
Then reference it in the template:
<div ng-messages="form.$error">
<div ng-message="required">You did not enter a field</div>
</div>
You could always pass the form to your directive.
javascript
app.directive('selectGov', function (){
return {
restrict: 'E',
templateUrl: 'select.html',
scope: {
text: "=?",
model: "=",
required: "=",
selectItems: "=?",
name: "#?",
form: "="
},
};
});
html
<select-gov model="person.phoneNumberType" text="q.phoneType" required="true" name="phoneType" form="myForm"></select-gov>
I want to add custom validation to the angular form.
<div class="form-group" ng-class="{ 'has-error': contactform.inputAmount.$invalid && submitted }">
<label for="inputAmount" class="col-lg-2 control-label">Amount</label>
<div class="col-lg-10">
<textarea ng-model="formData.inputAmount" class="validate[required,custom[comment]] feedback-input" rows="4" id="comment" name="comment" placeholder="Enter Amount to Convert" required></textarea>
</div>
</div>
I want only number or decimal input with inverted commas like
"1"
"123.1"
"123.12221"
How can i add this pattern
Help would be highly appreciated.
Thanks
You can use ng-pattern to validate your textarea.
Checkout here for example.
http://www.java2s.com/Tutorials/AngularJS/AngularJS_Example/Directives/Use_ng_pattern_to_validate.htm
Refer here for dynamic ng-pattern validation Angularjs dynamic ng-pattern validation
Use Directive for custom validations.
First write custom directive:
//Check For FLoat Validation
adminApp.directive('validateFloat', function() {
var FLOAT_REGEXP = /^\-?\d+((\.)\d+)?$/;
return {
require: 'ngModel',
restrict: '',
link: function(scope, elm, attrs, ctrl) {
// only apply the validator if ngModel is present and Angular has added the Float Number validator
ctrl.$validators.validateFloat = function(modelValue) {
return ctrl.$isEmpty(modelValue) || FLOAT_REGEXP.test(modelValue);
};
}
};
});
In directive used Regex for float (or) Decimal to check with ngModel value.
Then use directive in html page.
<input type="text" name="amount" class="form-control" ng-model=test.amount" validate-float required>
<span class="error-container" ng-show="myForm.amount.$dirty && myForm.amount.$invalid">
<span ng-cloak style="color:red" ng-show="myForm.amount.$error.required">Please Enter amount</span>
<span ng-cloak style="color:red" ng-show="!myForm.amount.$error.required&&myForm.amount.$error.validateFloat">Enter valid amount</span>
</span>
In HTML page mention the custom directive "validate-float" as attribute. And for showing error message in ng-Show mention the $error.validateFloat.
For more info about directive and validations: https://docs.angularjs.org/guide/directive,
https://docs.angularjs.org/guide/forms
I'm wondering if it is possible to retrieve the current form in a html template.
To be clear, I actually would like to reuse some form fields this way:
<form name="myForm">
<div ng-include src="'templates/form-field/email.html'">
<div ng-include src="'templates/form-field/password.html'">
</form>
Here is templates/form-field/email.html:
<div>
<label>Email:</label>
<input type="email" name="email" ng-model="data.email" ng-required="true">
</div>
<div ng-show="myForm.email.$error.required && myForm.email.$touched" class="error">Email is required</div>
<div ng-show="myForm.email.$error.email && myForm.email.$touched" class="error">Email is not valid</div>
So this works well and allows me to re-use HTML components including error messages.
However, I have to to give a static name to my form (here "MyForm")
Is there any way to retrieve the current form inside the tags?
I'm quite new with angular so there may even be better ways to achieve the same behavior (i.e. re-use html components / error messages) that I'm not aware of.
I'm interesting in any solution as long as it does not include any 3rd parties.
Maybe using $scope to define the name of the form?
With ng-include it creates a child scope from the parent so the data is only shared one-way, from parent to child. You will need to create a directive instead and set scope to false, or not declare it at all since that is the default, so that the controller and the directive will share the same scope.
Email Directive:
directive('emailTemplate', [function(){
return {
templateUrl: 'templates/form-field/email.html',
link: function(scope, elem, attrs) {
}
};
}]);
Password Directive:
directive('passwordTemplate', [function(){
return {
templateUrl: 'templates/form-field/password.html',
link: function(scope, elem, attrs) {
}
};
}]);
HTML
<form name="myForm">
<email-template></email-template>
<password-template></password-template>
</form>
EDIT
Email Directive:
directive('emailTemplate', [function(){
return {
templateUrl: 'templates/form-field/email.html',
link: function(scope, elem, attrs) {
scope.form = scope[attrs.formName];
}
};
}]);
HTML
<form name="myForm">
<email-template form-name="myForm"></email-template>
<password-template form-name="myForm"></password-template>
</form>
Template
<div>
<label>Email:</label>
<input type="email" name="email" ng-model="data.email" ng-required="true">
</div>
<div ng-show="form.email.$error.required && form.email.$touched" class="error">Email is required</div>
<div ng-show="form.email.$error.email && form.email.$touched" class="error">Email is not valid</div>
I'm trying to use Angular's built-in form functions, specifically setPristine() to clear the form on user submit. My controller has access to $scope.newForm (my form) with all of its methods, but running $scope.newForm.$setPristine() isn't resetting the form fields.
Here is my HTML:
<div ng-controller="NewFormController">
<h3>New Entry</h3>
<form name="newForm" method="post" novalidate>
<div class="input-group">
<label>Name</label>
<input name="name" type="text" ng-model="place.name"/>
</div>
<div class="input-group">
<label>Description</label>
<textarea name="description" type="text" ng-model="place.description"></textarea>
</div>
<div class="input-group">
<label>Neighborhood</label>
<input name="neighborhood" type="text" ng-model="place.neighborhood"/>
</div>
<div class="input-group">
<label>Address</label>
<input name="location" type="text" ng-model="place.address"/>
</div>
<input type="submit" value="Submit" ng-click="submit(place)"/>
</form>
</div>
And here is the controller where I call setPristine():
app.controller('NewFormController', function($scope, $compile) {
$scope.place = {
name: 'ExamplePlace',
description: 'This is a description!',
neighborhood: 'Manhattan',
address: '112 Street Place'
};
$scope.submit = function(place) {
$scope.newForm.$setPristine();
$scope.newForm.$setUntouched();
};
});
Here is a working codepen that reproduces my problem.
Note: I'm using Angular version 1.4.3.
$setPristine only marks the form as being $pristine, which is useful for validation-driven expressions and CSS (e.g. .ng-dirty)
So, $setPristine does not clear the form's controls. In fact, it wouldn't even know how to do that. Consider, that to "clear" could mean different things to different models. "Clear" could mean "", or undefined, or null, or anything at all that a custom input control that works with ngModel could mean.
So, to properly clear the form is to modify the View Model that drives the form to whatever definition of "clear" it needs. In most cases - yours included - it is just a matter of setting the View Model to a new object:
$scope.submit = function(place) {
$scope.newForm.$setPristine();
$scope.newForm.$setUntouched();
// clear the form
$scope.place = {};
};
I have a table that is created using ng-repeat. I want to add validation to each element in the table. The problem is that each input cell has the same name as the cell above and below it. I attempted to use the {{$index}} value to name the inputs, but despite the string literals in HTML appearing correct, it is now working.
Here is my code as of now:
<tr ng-repeat="r in model.BSM ">
<td>
<input ng-model="r.QTY" class="span1" name="QTY{{$index}}" ng-pattern="/^[\d]*\.?[\d]*$/" required/>
<span class="alert-error" ng-show="form.QTY{{$index}}.$error.pattern"><strong>Requires a number.</strong></span>
<span class="alert-error" ng-show="form.QTY{{$index}}.$error.required"><strong>*Required</strong></span>
</td>
</tr>
I have tried removing the {{}} from index, but that does not work either. As of now, the validation property of the input is working correctly, but the error message is not displayed.
Anyone have any suggestions?
Edit: In addition to the great answers below, here is a blog article that covers this issue in more detail: http://www.thebhwgroup.com/blog/2014/08/angularjs-html-form-design-part-2/
Since the question was asked the Angular team has solved this issue by making it possible to dynamically create input names.
With Angular version 1.3 and later you can now do this:
<form name="vm.myForm" novalidate>
<div ng-repeat="p in vm.persons">
<input type="text" name="person_{{$index}}" ng-model="p" required>
<span ng-show="vm.myForm['person_' + $index].$invalid">Enter a name</span>
</div>
</form>
Demo
Angular 1.3 also introduced ngMessages, a more powerful tool for form validation. You can use the same technique with ngMessages:
<form name="vm.myFormNgMsg" novalidate>
<div ng-repeat="p in vm.persons">
<input type="text" name="person_{{$index}}" ng-model="p" required>
<span ng-messages="vm.myFormNgMsg['person_' + $index].$error">
<span ng-message="required">Enter a name</span>
</span>
</div>
</form>
AngularJS relies on input names to expose validation errors.
Unfortunately, as of today, it is not possible (without using a custom directive) to dynamically generate a name of an input. Indeed, checking input docs we can see that the name attribute accepts a string only.
To solve the 'dynamic name' problem you need to create an inner form (see ng-form):
<div ng-repeat="social in formData.socials">
<ng-form name="urlForm">
<input type="url" name="socialUrl" ng-model="social.url">
<span class="alert error" ng-show="urlForm.socialUrl.$error.url">URL error</span>
</ng-form>
</div>
The other alternative would be to write a custom directive for this.
Here is the jsFiddle showing the usage of the ngForm: http://jsfiddle.net/pkozlowski_opensource/XK2ZT/2/
If you don't want to use ng-form you can use a custom directive that will change the form's name attribute. Place this directive as an attribute on the same element as your ng-model.
If you're using other directives in conjunction, be careful that they don't have the "terminal" property set otherwise this function won't be able to run (given that it has a priority of -1).
For example, when using this directive with ng-options, you must run this one line monkeypatch:
https://github.com/AlJohri/bower-angular/commit/eb17a967b7973eb7fc1124b024aa8b3ca540a155
angular.module('app').directive('fieldNameHack', function() {
return {
restrict: 'A',
priority: -1,
require: ['ngModel'],
// the ngModelDirective has a priority of 0.
// priority is run in reverse order for postLink functions.
link: function (scope, iElement, iAttrs, ctrls) {
var name = iElement[0].name;
name = name.replace(/\{\{\$index\}\}/g, scope.$index);
var modelCtrl = ctrls[0];
modelCtrl.$name = name;
}
};
});
I often find it useful to use ng-init to set the $index to a variable name. For example:
<fieldset class='inputs' ng-repeat="question questions" ng-init="qIndex = $index">
This changes your regular expression to:
name = name.replace(/\{\{qIndex\}\}/g, scope.qIndex);
If you have multiple nested ng-repeats, you can now use these variable names instead of $parent.$index.
Definition of "terminal" and "priority" for directives: https://docs.angularjs.org/api/ng/service/$compile#directive-definition-object
Github Comment regarding need for ng-option monkeypatch:
https://github.com/angular/angular.js/commit/9ee2cdff44e7d496774b340de816344126c457b3#commitcomment-6832095
https://twitter.com/aljohri/status/482963541520314369
UPDATE:
You can also make this work with ng-form.
angular.module('app').directive('formNameHack', function() {
return {
restrict: 'A',
priority: 0,
require: ['form'],
compile: function() {
return {
pre: function(scope, iElement, iAttrs, ctrls) {
var parentForm = $(iElement).parent().controller('form');
if (parentForm) {
var formCtrl = ctrls[0];
delete parentForm[formCtrl.$name];
formCtrl.$name = formCtrl.$name.replace(/\{\{\$index\}\}/g, scope.$index);
parentForm[formCtrl.$name] = formCtrl;
}
}
}
}
};
});
Use the ng-form directive inside of the tag in which you are using the ng-repeat directive. You can then use the scope created by the ng-form directive to reference a generic name. For example:
<div class="form-group col-sm-6" data-ng-form="subForm" data-ng-repeat="field in justificationInfo.justifications"">
<label for="{{field.label}}"><h3>{{field.label}}</h3></label>
<i class="icon-valid" data-ng-show="subForm.input.$dirty && subForm.input.$valid"></i>
<i class="icon-invalid" data-ng-show="subForm.input.$dirty && subForm.input.$invalid"></i>
<textarea placeholder="{{field.placeholder}}" class="form-control" id="{{field.label}}" name="input" type="text" rows="3" data-ng-model="field.value" required>{{field.value}}</textarea>
</div>
Credit to: http://www.benlesh.com/2013/03/angular-js-validating-form-elements-in.html
Added more complex example with "custom validation" on the side of controller http://jsfiddle.net/82PX4/3/
<div class='line' ng-repeat='line in ranges' ng-form='lineForm'>
low: <input type='text'
name='low'
ng-pattern='/^\d+$/'
ng-change="lowChanged(this, $index)" ng-model='line.low' />
up: <input type='text'
name='up'
ng-pattern='/^\d+$/'
ng-change="upChanged(this, $index)"
ng-model='line.up' />
<a href ng-if='!$first' ng-click='removeRange($index)'>Delete</a>
<div class='error' ng-show='lineForm.$error.pattern'>
Must be a number.
</div>
<div class='error' ng-show='lineForm.$error.range'>
Low must be less the Up.
</div>
</div>
Looking over these solutions, the one provided by Al Johri above is the closest to my needs, but his directive was a little less programmable then I wanted. Here is my version of his solutions:
angular.module("app", [])
.directive("dynamicFormName", function() {
return {
restrict: "A",
priority: 0,
require: ["form"],
compile: function() {
return {
pre: function preLink(scope, iElement, iAttrs, ctrls) {
var name = "field" + scope.$index;
if (iAttrs.dnfnNameExpression) {
name = scope.$eval(iAttrs.dnfnNameExpression);
}
var parentForm = iElement.parent().controller("form");
if (parentForm) {
var formCtrl = ctrls[0];
delete parentForm[formCtrl.$name];
formCtrl.$name = name;
parentForm[formCtrl.$name] = formCtrl;
}
}
}
}
};
});
This solution lets you just pass a name generator expression to the directive and avoids the lock down to pattern substitution he was using.
I also had trouble initially with this solution since it didn't show an example of using it in markup, so here is how I used it.
<form name="theForm">
<div ng-repeat="field in fields">
<input type="number" ng-form name="theInput{{field.id}}" ng-model="field.value" dynamic-form-name dnfn-name-expression="'theInput' + field.id">
</div>
</form>
I have a more complete working example on github.
validation is working with ng repeat if I use the following syntax scope.step3Form['item[107][quantity]'].$touched
I don't know it's a best practice or the best solution, but it works
<tr ng-repeat="item in items">
<td>
<div class="form-group">
<input type="text" ng-model="item.quantity" name="item[<% item.id%>][quantity]" required="" class="form-control" placeholder = "# of Units" />
<span ng-show="step3Form.$submitted || step3Form['item[<% item.id %>][quantity]'].$touched">
<span class="help-block" ng-show="step3Form['item[<% item.id %>][quantity]'].$error.required"> # of Units is required.</span>
</span>
</div>
</td>
</tr>
Building on pkozlowski.opensource's answer, I've added a way to have dynamic input names that also work with ngMessages. Note the ng-init part on the ng-form element and the use of furryName. furryName becomes the variable name that contains the variable value for the input's name attribute.
<ion-item ng-repeat="animal in creatures track by $index">
<ng-form name="animalsForm" ng-init="furryName = 'furry' + $index">
<!-- animal is furry toggle buttons -->
<input id="furryRadio{{$index}}"
type="radio"
name="{{furryName}}"
ng-model="animal.isFurry"
ng-value="radioBoolValues.boolTrue"
required
>
<label for="furryRadio{{$index}}">Furry</label>
<input id="hairlessRadio{{$index}}"
name="{{furryName}}"
type="radio"
ng-model="animal.isFurry"
ng-value="radioBoolValues.boolFalse"
required
>
<label for="hairlessRadio{{$index}}">Hairless</label>
<div ng-messages="animalsForm[furryName].$error"
class="form-errors"
ng-show="animalsForm[furryName].$invalid && sectionForm.$submitted">
<div ng-messages-include="client/views/partials/form-errors.ng.html"></div>
</div>
</ng-form>
</ion-item>
Here an example of how I do that, I don't know if it is the best solution, but works perfectly.
First, code in HTML.
Look at ng-class, it's calling hasError function.
Look also to the input's name declaration. I use the $index to create different input names.
<div data-ng-repeat="tipo in currentObject.Tipo"
ng-class="{'has-error': hasError(planForm, 'TipoM', 'required', $index) || hasError(planForm, 'TipoM', 'maxlength', $index)}">
<input ng-model="tipo.Nombre" maxlength="100" required
name="{{'TipoM' + $index}}"/>
And now, here is the hasError function:
$scope.hasError = function (form, elementName, errorType, index) {
if (form == undefined
|| elementName == undefined
|| errorType == undefined
|| index == undefined)
return false;
var element = form[elementName + index];
return (element != null && element.$error[errorType] && element.$touched);
};
It is too late but might be it can help anyone
Create unique name for every control
Validate by using fromname[uniquname].$error
Sample code:
<input
ng-model="r.QTY"
class="span1"
name="QTY{{$index}}"
ng-pattern="/^[\d]*\.?[\d]*$/" required/>
<div ng-messages="formName['QTY' +$index].$error"
ng-show="formName['QTY' +$index].$dirty || formName.$submitted">
<div ng-message="required" class='error'>Required</div>
<div ng-message="pattern" class='error'>Invalid Pattern</div>
</div>
See working demo here
If your using ng-repeat $index works like this
name="QTY{{$index}}"
and
<td>
<input ng-model="r.QTY" class="span1" name="QTY{{$index}}" ng-
pattern="/^[\d]*\.?[\d]*$/" required/>
<span class="alert-error" ng-show="form['QTY' + $index].$error.pattern">
<strong>Requires a number.</strong></span>
<span class="alert-error" ng-show="form['QTY' + $index].$error.required">
<strong>*Required</strong></span>
</td>
we have to show the ng-show in ng-pattern
<span class="alert-error" ng-show="form['QTY' + $index].$error.pattern">
<span class="alert-error" ng-show="form['QTY' + $index].$error.required">
It is possible and here is how I do the same thing with a table of inputs.
wrap the table in a form like so
Then just use this
I have a form with multi-nested directives that all contain input(s), select(s), etc...
These elements are all enclosed in ng-repeats, and dynamic string values.
This is how to use the directive:
<form name="myFormName">
<nested directives of many levels>
<your table here>
<perhaps a td here>
ex: <input ng-repeat=(index, variable) in variables" type="text"
my-name="{{ variable.name + '/' + 'myFormName' }}"
ng-model="variable.name" required />
ex: <select ng-model="variable.name" ng-options="label in label in {{ variable.options }}"
my-name="{{ variable.name + index + '/' + 'myFormName' }}"
</select>
</form>
Note: you can add and index to the string concatenation if you need to serialize perhaps a table of inputs; which is what I did.
app.directive('myName', function(){
var myNameError = "myName directive error: "
return {
restrict:'A', // Declares an Attributes Directive.
require: 'ngModel', // ngModelController.
link: function( scope, elem, attrs, ngModel ){
if( !ngModel ){ return } // no ngModel exists for this element
// check myName input for proper formatting ex. something/something
checkInputFormat(attrs);
var inputName = attrs.myName.match('^\\w+').pop(); // match upto '/'
assignInputNameToInputModel(inputName, ngModel);
var formName = attrs.myName.match('\\w+$').pop(); // match after '/'
findForm(formName, ngModel, scope);
} // end link
} // end return
function checkInputFormat(attrs){
if( !/\w\/\w/.test(attrs.rsName )){
throw myNameError + "Formatting should be \"inputName/formName\" but is " + attrs.rsName
}
}
function assignInputNameToInputModel(inputName, ngModel){
ngModel.$name = inputName
}
function addInputNameToForm(formName, ngModel, scope){
scope[formName][ngModel.$name] = ngModel; return
}
function findForm(formName, ngModel, scope){
if( !scope ){ // ran out of scope before finding scope[formName]
throw myNameError + "<Form> element named " + formName + " could not be found."
}
if( formName in scope){ // found scope[formName]
addInputNameToForm(formName, ngModel, scope)
return
}
findForm(formName, ngModel, scope.$parent) // recursively search through $parent scopes
}
});
This should handle many situations where you just don't know where the form will be. Or perhaps you have nested forms, but for some reason you want to attach this input name to two forms up? Well, just pass in the form name you want to attach the input name to.
What I wanted, was a way to assign dynamic values to inputs that I will never know, and then just call $scope.myFormName.$valid.
You can add anything else you wish: more tables more form inputs, nested forms, whatever you want. Just pass the form name you want to validate the inputs against. Then on form submit ask if the $scope.yourFormName.$valid
This will get the name in the ng-repeat to come up seperate in the form validation.
<td>
<input ng-model="r.QTY" class="span1" name="{{'QTY' + $index}}" ng-pattern="/^[\d]*\.?[\d]*$/" required/>
</td>
But I had trouble getting it to look up in its validation message so I had to use an ng-init to get it to resolve a variable as the object key.
<td>
<input ng-model="r.QTY" class="span1" ng-init="name = 'QTY' + $index" name="{{name}}" ng-pattern="/^[\d]*\.?[\d]*$/" required/>
<span class="alert-error" ng-show="form[name].$error.pattern"><strong>Requires a number.</strong></span>
<span class="alert-error" ng-show="form[name].$error.required"><strong>*Required</strong></span>
My requirements were a bit different than the ones asked on the original question, but hopefully I might help someone who is going through the same problem that I was..
I had to define if a field was required or not based on a scope variable.. So I basically had to set ng-required="myScopeVariable" (which is a boolean variable).
<div class="align-left" ng-repeat="schema in schemas">
<input type="text" ng-required="schema.Required" />
</div>