I have a ember-app-kit application. For the form I am using ember default views. But for form validations I have came across with this lib which everyone highly recommends. Ember Validations By Docyard . But I am not sure how to implement the same with my eak set-up.
Questions that I have:
1. Where should I add validations ?
2. What to declare when defining validations?
3. Errors how to show them on focus out or even on submit button ?
Say for example I have a sign up form and I want to validate firstname lastname, email, password, gender(select options) . How should I go about it ?
If possible please clarify the queries with a JSbin.
Validations should go to controller, unless your working with dyanmic formsets, which can be duplicated. Also u have to wrap ControllerObject into this
var AddController = Ember.ArrayController.extend(Ember.Validations.Mixin, {}
To start validation u have to make new Object named validations
You have to add input value to be validated
validations: {
newFirstname:{
format: { with: /^[A-Za-z-]{2,16}$/, allowBlank: true, message: 'Enter valid name.' }
},
newFamilyname: {
format: { with: /^[A-Za-z-]{3,16}$/ , message: 'Required field lastname.' }
}
},
Showing errors.
<div class="row">
<div class="col-md-6 col-xs-4">
<label>First name: </label>
{{input type="text" placeholder="First name" value=newFirstname class="form-control"}}
{{#if errors.newFirstname}}
<span class="error errorForValidation"><span class="glyphicon glyphicon-warning-sign"></span> {{errors.newFirstname}}</span>
{{/if}}
</div>
<div class="col-md-6 col-xs-4">
<label>*Last name: </label>
{{input type="text" placeholder="Family name" value=newFamilyname class="form-control"}}
{{#if errors.newFamilyname}}
<span class="error"><span class="glyphicon glyphicon-warning-sign"></span> {{errors.newFamilyname}}</span>
{{/if}}
</div>
</div><!--end row-->
Showing button when validation is flawless
<button type="submit" class="btn btn-primary" {{bind-attr disabled="isInvalid"}}{{action 'GetData'}}>Create</button>
JSBIN : http://emberjs.jsbin.com/iDeQABo/17/edit
Related
I have my chat and I dont want people to send empty message so I would like that my input become required. Thanks for your help.
I tried to put "required='required'" in the input line, I also tried veeValidate but it broke my chat when I use it, I also tried to put "Required = true" in Props and data but without a good result
This is ChatForm.vue
<template>
<div class="input-group" >
<input id="btn-input" type="text" name="message" class="form-control input-sm" placeholder="Ecrire..." v-model="newMessage" #keyup.enter="sendMessage">
<span class="input-group-btn">
<button class="btn btn-primary btn-sm" id="btn-chat" #click="sendMessage">
✓
</button>
</span>
</div>
</template>
<script>
export default {
props: ['user'],
data() {
return {
newMessage: '',
}
},
methods: {
sendMessage() {
this.$emit('messagesent', {
user: this.user,
message: this.newMessage
});
setTimeout(function() {
const messages = document.getElementById('mess_cont');
messages.scrollTop = messages.scrollHeight;
}, 200);
this.newMessage = '';
}
}
}
</script>
And this is my form in the app.blade.php
<div id="app" class="container-chat">
<div class="row">
<div class="col-md-12 col-md-offset-2">
<div class="col-md-12 col-md-offset-2">
<div class="panel-body panel-content" id="mess_cont">
<chat-messages id="mess" :messages="messages" :currentuserid="{{Auth::user()->id}}"></chat-messages>
</div>
<div class="panel-footer">
<chat-form
v-on:messagesent="addMessage"
:user="{{ Auth::user() }}"
></chat-form>
</div>
</div>
</div>
</div>
</div>
Try to change your ChatForm.vue like this:
<template>
<form #submit.prevent="sendMessage">
<div class="input-group" >
<input id="btn-input" type="text" name="message" class="form-control input-sm" placeholder="Ecrire..." v-model="newMessage" required>
<span class="input-group-btn">
<button class="btn btn-primary btn-sm" type="submit" id="btn-chat">
✓
</button>
</span>
</div>
</template>
You are not treating the input in the correct way, the input which is required needs to be inside a form and the required keyword will prevent the form submission if the input field is empty.
There are a few things I would do differently.
1/ Wrap your chat form in a tag, and execute the sendMessage() method on submit. This will give your users a nicer experience, as they can just to submit the message.
2/ Convert the button into a submit button so it triggers the form.submit event.
3/ You can easily disable the button by checking whether newMessage has contents. I don't think you need vee validate or anything else to achieve this; for something as simple as a chat form, your user doesn't need much more feedback than seeing a disabled button to realise (s)he needs to write something first.
4/ in the addMessage method you can just check the contents of newMessage and not do anything when it's empty. This is perfectly fine because you already hinted the user by disabling the button too.
I think this is a subtle way where you guide your user, but don't overdo it.
Please add name attributes to all of your form elements. Some of the element in my form had name attribute and some didn't. Element which had name attributes worked correctly but the one's which didn't had name failed.
I am new to angular let say, i have reactive form like follow
ngOnInit() {
this.registerFormGroup = this.formBuilder.group({
email: [ '', Validators.compose([Validators.required, Validators.email])],
password: this.formBuilder.group({
first: [ '', Validators.required ],
second: [ '', Validators.required, ]
})
});
}
and my angular template looks like follow
<div class="container">
<form [formGroup]="registerFormGroup"
(ngFormSubmit)="registerUser(registerFormGroup.value)" novalidate>
<div class="form-group" >
<label for="email">Email</label>
<input type="email" formControlName="email" placeholder="Enter Email"
class="form-control">
</div>
<div *ngIf="!registerFormGroup.get('password').get('first').valid"
class="alert alert-danger">
</div>
<div class="form-group text-center">
<button type="submit" class="btn btn-success btn-lg"
[disabled]="!registerFormGroup.valid">Submit</button>
</div>
For example, email field has two validations such as required and email type validate so depends upon the error I have to display error message so in my template am using like
<div *ngIf="!registerFormGroup.get('email').valid && (registerFormGroup.get('email').touched)"
class="alert alert-danger">
</div>
Instead of adding same registerFormGroup.get('email') again and again i trying to create template expression like #emailForm="registerFormGroup.get('email')" in
<input type="email" formControlName="email" placeholder="Enter Email" class="form-control" #emailForm="registerFormGroup.get('email')">
so that i can use use like
<div *ngIf="!emailForm.valid" class="alert alert-danger">
</div>
but i am getting error like
compiler.es5.js:1690 Uncaught Error: Template parse errors:
There is no directive with "exportAs" set to "registerFormGroup.get('email')" ("l>
]#emailForm="registerFormGroup.get('email')">
what mistake i made??
You can create common function to access form like below:
validateFormControl(controName: string) {
let control = registerFormGroup.get(controName);
return control.invalid && control.touched;
}
In Templete use this call wherever you need, you just need to pass your control name in function, you can modify this function as per your need as well and you do not need to use form.get all the time. This makes your template more cleaner and performance efficient.
<div *ngIf="validateFormControl('email')"
class="alert alert-danger">
error message
</div>
<div *ngIf="validateFormControl('password')"
class="alert alert-danger">
error message
</div>
Create a method on the component that returns if the form is valid or not and return it in the component
checkError(){ // either you can pass the form from the template or use the component for decleration
return registerFormGroup.get('email').valid;
}
In the template call
<div *ngIf="checkError()" class="alert alert-danger">
// Always make sure not to use controls in the template it will result in AOT compilation error
</div>
try this :
component.html
<div class="container">
<form [formGroup]="registerFormGroup"
(ngFormSubmit)="registerUser(registerFormGroup.value)" novalidate>
<div class="form-group" [ngClass]="{'has-error':!registerFormGroup.controls['email'].valid}">
<label for="email">Email</label>
<input type="email" formControlName="email" placeholder="Enter Email"
class="form-control">
<p class="alert alert-danger" *ngIf="registerFormGroup.controls['email'].dirty && !registerFormGroup.controls['email'].valid">Invalid email address</p>
</div>
<div class="form-group text-center">
<button type="submit" class="btn btn-primary" [disabled]="!registerFormGroup.valid">Submit</button>
</div>
</form>
</div>
component.ts
import { FormGroup, FormBuilder, Validators } from '#angular/forms';
export class AppComponent implements OnInit {
registerFormGroup: any;
constructor(
private formBuilder: FormBuilder
) {}
ngOnInit() {
this.registerFormGroup = this.formBuilder.group({
email: [null , Validators.compose([Validators.required, Validators.email])]
});
}
}
Angular team strongly discourage from using functions outputs in templates due to change detection strategy. You might be interested in following solution, using ngForm directive:
<div class="container">
<form [formGroup]="registerFormGroup"
(ngFormSubmit)="registerUser(registerFormGroup.value)" novalidate>
<div class="form-group" >
<label for="email">Email</label>
<input type="email" formControlName="email" placeholder="Enter Email "
class="form-control" #email="ngForm">
</div>
<div *ngIf="email.invalid"
class="alert alert-danger">
</div>
It's still a hush to copy-paste it in template, but at least you might have direct reference to control via it's template variable. I personally go with controller getter function still, but I'm posting this answer for sake of answer completeness.
Although I agree with the accepted answer (you should have a dedicated method in your form component that will encapsulate the validation process)
sometimes you need a quick check in the template:
The trick is to expose the formGroup from your component and use it like so:
Template:
<input id="name" class="form-control"
formControlName="name" required
[class.is-invalid]="
f.name.invalid &&
(f.name.touched ||
f.name.touched.dirty)">
Component:
//easily access your form fields
get f() { return this.checkoutForm.controls; }
I was also looking for a more elegant solution than calling form.get multiple times. Here is what I come up with using ngif
<div class="col-sm-6" *ngIf="form.get('sponsor') as sponsor">
<input type="text" formControlName="sponsor" id="sponsor" class="form-control" name="sponsor"
[class.is-invalid]="sponsor.errors && sponsor.touched">
</div>
using the as feature on ngIf to create a template variable
I'm pretty new to Ember.js and I'm having trouble how to do a validation on a certain input field.
Here is the code for my template index.hbs:
<div class="jumbotron text-center">
<h1>Coming Soon</h1>
<br/><br/>
<p>Don't miss our launch date, request an invitation now.</p>
<div class="form-horizontal form-group form-group-lg row">
<div class="col-xs-10 col-xs-offset-1 col-sm-6 col-sm-offset-1 col-md-5 col-md-offset-2">
{{input type="email" value=model.email class="form-control" placeholder="Please type your e-mail address." autofocus="autofocus"}}
</div>
<div class="col-xs-10 col-xs-offset-1 col-sm-offset-0 col-sm-4 col-md-3">
<button disabled={{isDisabled}} {{action 'saveInvitation' model}} class="btn btn-primary btn-lg btn-block">Request invitation</button>
</div>
</div>
{{#if responseMessage}}
<div class="alert alert-success">{{responseMessage}}</div>
{{/if}}
<br/><br/>
</div>
and here is the code from my controller index.js:
import Ember from 'ember';
export default Ember.Controller.extend({
headerMessage: 'Coming soon',
responseMessage: '',
email: '',
isValid: Ember.computed.match('email', /^.+#.+\..+$/),
isDisabled: Ember.computed.not('isValid'),
});
The input field that I want to get validation for is the email one. I know how to go about the validation by replacing the value="" field to just value="email", but I want to know how I can do it using the value=model.email
This seems like an easy problem, but I can't find anything on the docs about this particular issue.
As you are using input helper this will update model.email property when you type in text field.
1.You dont need to declare email property in controller.
2.isValid computed property dependent key should be model.email
import Ember from 'ember';
export default Ember.Controller.extend({
headerMessage: 'Coming soon',
responseMessage: '',
isValid: Ember.computed.match('model.email', /^.+#.+\..+$/),
isDisabled: Ember.computed.not('isValid'),
});
You can check the validity of email inside saveInvitation action.
Hello all i'm updating my forms to angular material style and i'd find something weird.
this form update the user data. so i'd load the data in a ng-model and put it in the form, so in that way the user can update its data.
the problem is the validation of one input that work in a strange way. First load with a wrong validation. all the data good, but that input doesn't validate.
<md-input-container class="md-block">
<!-- LABEL DNI-->
<label>D.N.I.</label>
<!-- INPUT DNI-->
<input type="text"
minlength="4"
md-maxlength="8"
maxlength="8"
placeholder="D.N.I."
ng-model="user.dni" name="dni" required/>
<!-- MENSAJES -->
<div ng-messages="changePerfil.dni.$error"
ng-if='changePerfil.dni.$dirty || changePerfil.dni.$touched'>
<div ng-message="required">Este campo no puede estar vacio.</div>
</div>
<!--ICONOS DE MENSAJE -->
<span ng-show="changePerfil.dni.$valid" class="glyphicon glyphicon-ok form-control-feedback"></span>
<span ng-show="changePerfil.dni.$dirty && changePerfil.dni.$invalid" class="glyphicon glyphicon-remove form-control-feedback"></span>
</md-input-container>
but if this is not weird. if i delete one character and type it again, it does, the validation is done.
there's someone with a clue of what's happening?
EDIT
i've found the problem but is rare... it's seems to not recognize as a string that property on my JSON
var user = {
nombre: "Paulo",
apellido: "Galdo Sandoval",
dni: "12345678",
domicilio: "Street 972",
email: "mail#hotmail.com",
estado: "Activo",
fechaCreacion: "2016-01-06",
fechaModificacion: "2016-06-16"
};
to make it work i must do this on my function:
$scope.user = datos.data;
var stringDni = datos.data.dni;
$scope.user.dni = stringDni.toString();
At a user registration web form I validate via ajax whether a username already exists in DB. When a username already exists, the corresponding input-text will go .has-error class.
Edit
I changed the ng-class attribute to {'has-error':signup.userUnavaliable()} but even though that the input is not seemly getting such class, in other words the mail input text is not getting red.
I place the directive at the wrapper as this is how the Bootstrap docs tell it.
This is how my form looks like now:
<form class="form-inline" role="form">
<div class="form-group" ng-class="{'has-error':signup.userUnavaliable()}">
<input type="email" class="form-control input-lg" ng-model="signup.mail" placeholder="e-mail" ng-change="signup.userExists(signup.mail)">
</div>
<div class="form-group">
<input type="password" class="form-control input-lg" placeholder="Contraseña" ng-nodel="signup.password">
</div>
<div class="checkbox">
<label>
<input type="checkbox" ng-model="signup.role" value="admin"> Administrador
</label>
</div>
<button type="submit" class="btn btn-primary" ng-disabled="signup.unavaliable">Registrar</button>
</form>
And this is my Controller:
app.controller('SignUpController',function ($scope, $http) {
$scope.userUnavaliable = function() {
return $scope.unavaliable
}
$scope.print = function(msg) {
console.log(msg)
}
this.userExists = function(mail) {
if (mail) {
var who = $http.get("/existingUsers/"+mail)
who.success(function(data,status, headers, config) {
if (data.mail) {
$scope.unavaliable = true
console.log(data.mail + " ya existe en la DB")
}
else{
$scope.unavaliable = false
}
});
who.error(function(data, status, headers, config) {
alert("AJAX failed!");
})
}
}
})
Also, I'm trying to disable the button and it's not gettin such effect, so I think my controller has any issue.
As given in bootstrap validation states, if you want your label color to be changed according to the validation state of the input, you will have to apply ng-class on that.
Here is the sample code that I had written a little while. Please note that to take advantage of Angular JS validation states on form elements, you need to provide name to all input types.
This code would turn the input box plus label color red or green depending upon the validation state.
<div class="form-group"
ng-class="( newProfileForm.email.$dirty ? (newProfileForm.email.$valid ? 'has-success has-feedback' : 'has-error has-feedback' ) : ' ')"
>
<label class="col-sm-4 control-label">Email</label>
<div class="col-sm-6">
<input type="email" name="email" class="form-control" ng-model="user.mail" ng-required='true'>
<!-- Invalid Span -->
<span ng-if='newProfileForm.email.$invalid && newProfileForm.email.$dirty' class="glyphicon glyphicon-remove form-control-feedback"></span>
<!-- Valid Span -->
<span ng-if='newProfileForm.email.$valid' class="glyphicon glyphicon-ok form-control-feedback"></span>
<p ng-show="newProfileForm.email.$invalid && newProfileForm.email.$dirty" class="bg-danger pad">Please enter valid email.</p>
</div>
</div>
[EDIT] Explanation for name attribute.
Angular makes use of name attribute to determine the state of the input control. So, if you have a input control with name username. Even your form should have a name for angular validation states.
AngularJS would use the fallowing variables to check its validation state.
formname.username.$valid = if username is alright according to validation rules.
formname.username.$invalid = if username is invalid
formname.username.$dirty = if user has edited the input box
formname.username.$pristine = if user has not edited the input box.
Angular makes use of name attribute for validaiton.
And if you want your button to be disabled depending upon the availability of the user.
Use something like
<button class="btn btn-default" ng-disabled="unavaliable">Submit</button>
try
<div class="form-group" ng-class="{'has-error':signup.userUnavaliable()}">