Vue Formulate validation for two fields at the same time - forms

I'm currently building a form in Vue js and I'm using Vueformulate, the docs have various ways of validation however there is no validation method or implementation that for my use case. I would like the validation to call a custom function because this way I could check if Field1 or Field2 has a value. Is there an implementation like my psuedocode below? thanks in advance!
<FormulateForm #submit="onSubmit" #default="{ hasErrors }">
<FormulateInput
type="text"
label="Field1"
validation="customValidation"
/>
<FormulateInput
type="text"
label="Field2"
validation="customValidation"
/>
<FormulateInput
type="submit"
label="Submit"
input-class="btn btn-primary w-full"
:disabled="hasErrors"
/>
</FormulateForm>
//NOT REAL CODE
customValidation(formValues){
if(formValues.Field1 || formValues.Field2){
return true // CHECK IF EITHER FIELD1 OR FIELD 2 HAS VALUE IF SO MARK THE FIELD AS VALID WHICH ENABLES SUBMIT BUTTON
}
return false
}

You can declare a custom validation rule via <FormulateInput>.validationRules:
<script setup>
const validationRules = {
customValidation({ getFormValues }) {
// property names match the input names
const { field1, field2 } = getFormValues()
if (field1 || field2) {
return true
}
},
}
</script>
<template>
<FormulateInput
type="text"
label="Field1"
name="field1"
validation="customValidation"
:validationRules="validationRules"
/>
<FormulateInput
type="text"
label="Field2"
name="field2"
validation="customValidation"
:validationRules="validationRules"
/>
</template>
But FormulateForm assumes an error state unless all fields are touched (at least in my demo). Not sure how you could get around that.
demo

Related

How to disable autocomplete with v-form

I want to disable chrome autocomplete in my v-form. How do I do that? I don't see a autocomplete property on the v-form.
https://next.vuetifyjs.com/en/api/v-form/
While it is a property on a normal html form
https://www.w3schools.com/tags/att_form_autocomplete.asp
By setting autocomplete="username" and autocomplete="new-password" on v-text-field you can actually turn off the autocomplete in chrome.
here is a code that worked for me:
<v-form lazy-validation ref="login" v-model="validForm" #submit.prevent="submit()">
<v-text-field
v-model="user.email"
label="Email"
autocomplete="username"
/>
<v-text-field
v-model="user.password"
label="Password"
type="password"
autocomplete="new-password"
/>
<v-btn type="submit" />
</v-form>
Edit: autocomplete isn't set as a prop in vuetify docs but if you pass something to a component which isn't defined as prop in that component, it will accept it as an attribute and you can access it through $attrs.
here is the result of the above code in vue dev tools:
and here is the rendered html:
I wasn't able to get autofill disabled with the above methods, but changing the name to a random string/number worked.
name:"Math.random()"
https://github.com/vuetifyjs/vuetify/issues/2792
use autocomplete="off" in <v-text-field
<v-text-field
autocomplete="off"
/>
Just add:
autocomplete="false"
to your <v-text-field> or any input
autocomplete="null"
This one prevents Chrome autofill feature
I have not been able to get any of the previous proposals to work for me, what I finally did is change the text-flied for a text-area of a single line and thus it no longer autocompletes
Try passing the type='search' and autocomplete="off" props.
I also ran into a similar problem. Nothing worked until I found this wonderful Blog "How to prevent Chrome from auto-filling on Vue?" by İbrahim Turan
The main catch is that we will change the type of v-text-field on runtime. From the below code you can see that the type of password field is assigned from the value fieldTypes.password. Based on focus and blur events we assign the type of the field. Also, the name attribute is important as we decide based on that in the handleType() function.
I'm also pasting the solution here:
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<template>
<div id="app">
<div v-if="isloggedin" class="welcome">
Welcome {{username}}
</div>
<div v-else id="form-wrapper">
<label for="username">Username: </label>
<input
v-model="username"
class="form-input"
type="text"
name="username"
value=""
autocomplete="off"
/>
<label for="password">Password: </label>
<input
v-model="password"
class="form-input"
:type="fieldTypes.password"
name="password"
value=""
#focus="handleType"
#blur="handleType"
autocomplete="off"
/>
<button class="block" type="button" #click="saveCredentials">
Submit Form
</button>
</div>
</div>
</template>
<script>
export default {
name: 'App',
data() {
return {
username: '',
password: '',
isloggedin: false,
fieldTypes: {
password: 'text',
}
}
},
methods: {
saveCredentials() {
this.isloggedin = true;
},
handleType(event) {
const { srcElement, type } = event;
const { name, value } = srcElement;
if(type === 'blur' && !value) {
this.fieldTypes[name] = 'text'
} else {
this.fieldTypes[name] = 'password'
}
}
}
}
</script>

Vue reactive forms components communication

I have multiple form components, each form as a component. Now, I want to use same component for adding data and editing data. So what I am thinking to do is something like when the Post component receives a prop containing data that means it is in a "editing mode" and populate the fields with its data, if not it is in "create mode".
So how should I use v-model in my form fields?
Should I v-model each form field to a computed property (which has a getter and a setter) and the computed property would check if the data prop is empty and if not use its data to populate fields ? And in the computed property set method to update the prop ?
parent component
<post :data.sync="dataObject"></post>
child (Post) component
<template>
<div>
<form>
<input type="text" label="title" v-model="computedTitle" />
<input type="text" label="message" v-model="computedMessage" />
</form>
</div>
<input type="button" #click="submitted"
<template>
<script>
export default {
data(){
return{
post:{
title:null,
message:null
}
}
},
props:["data"],
computed:{
computedTitle:{
get(){
return data ? data.title : ''
},
set(computedTitle){
computedTitle = computedTitle // trying to update computed property value with the field value...
}
},
computedMessage:{...}
}
}
</script>
You can use watch to check data prop, if it's set then set to local post variable.
If created, then data is null, post.title and post.message are set to null
If updated, then data is not null, post.title is set to data.title and post.message to set to data.message
<template>
<div>
<form>
<input type="text" label="title" v-model="post.title" />
<input type="text" label="message" v-model="post.message" />
</form>
</div>
<input type="button" #click="submitted"
<template>
<script>
export default {
data() {
return{
post: {
title: null,
message: null
}
}
},
props:["data"],
watch: {
data: {
handler(newData) {
if (newData) {
this.post = {
title: newData.title,
message: newData.message
}
}
},
immediate: true // this makes watch is called when component created
}
}
}
</script>
Note that you should use immediate: true to make the watch's function called when component is created

In Redux, how to get user input

I have a form, how to get the use input in the handleSubmit() method?
handleSubmit(e) {
e.preventDefault()
//how to get the user input?
}
render() {
return (
<div className="col-sm-4">
<form onSubmit={this.handleSubmit}>
<input type="text" placeholder="user"/>
<input type="text" placeholder="comments"/>
<input type="submit" hidden/>
</form>
</div>
)
}
so far, I know three solutions:
The first one, use refs, but I can see there are lots of people saying that we should avoid using it
The second one, add onChange() to each <input>, e.g.
class Example extends React.Component {
state = {
inputValue: ""
};
handleInputChanged(e) {
this.setState({
inputValue: e.target.value
});
}
render() {
return (
<div>
<input onChange={this.handleInputChanged.bind(this)} value={this.state.inputValue}>
</div>
);
}
}
this one is fine with a few inputs. But if the form has 20 input fields, then there are 20 different onChange methods?
third, use some npm module, like redux-form.
any other suggestion? Thanks
You can actually just do an onChange on the parent form like so:
onChange(e) {
switch(e.target.type) {
case 'checkbox':
this.setState({ [e.target.name]: e.target.checked });
break;
default:
this.setState({ [e.target.name]: e.target.value });
break;
}
}
// in render
<form onChange={this.onChange.bind(this)}>
<input name="foo1" />
<input name="foo2" />
<input name="foo3" />
<input name="foo4" />
<input name="foo5" />
<input name="foo6" />
<input name="foo7" />
<input name="foo8" />
</form>
There are certain libraries like https://github.com/christianalfoni/formsy-react, https://github.com/prometheusresearch/react-forms. These forms have additional functions pre written for form submitting, validations. I think using refs is a tedious and unwanted task if the form is big with the reason being that if it is controlled form you need to access the state value for controlled components which brings unnecessary complications. You can do it but it is better to use prewritten libraries.

Trigger validation of all fields in Angular Form submit

I'm using this method: http://plnkr.co/edit/A6gvyoXbBd2kfToPmiiA?p=preview to only validate fields on blur. This works fine, but I would also like to validate them (and thus show the errors for those fields if any) when the user clicks the 'submit' button (not a real submit but a data-ng-click call to a function)
Is there some way to trigger validation on all the fields again when clicking that button?
What worked for me was using the $setSubmitted function, which first shows up in the angular docs in version 1.3.20.
In the click event where I wanted to trigger the validation, I did the following:
vm.triggerSubmit = function() {
vm.homeForm.$setSubmitted();
...
}
That was all it took for me. According to the docs it "Sets the form to its submitted state." It's mentioned here.
I know, it's a tad bit too late to answer, but all you need to do is, force all forms dirty. Take a look at the following snippet:
angular.forEach($scope.myForm.$error.required, function(field) {
field.$setDirty();
});
and then you can check if your form is valid using:
if($scope.myForm.$valid) {
//Do something
}
and finally, I guess, you would want to change your route if everything looks good:
$location.path('/somePath');
Edit: form won't register itself on the scope until submit event is trigger. Just use ng-submit directive to call a function, and wrap the above in that function, and it should work.
In case someone comes back to this later... None of the above worked for me. So I dug down into the guts of angular form validation and found the function they call to execute validators on a given field. This property is conveniently called $validate.
If you have a named form myForm, you can programmatically call myForm.my_field.$validate() to execute field validation. For example:
<div ng-form name="myForm">
<input required name="my_field" type="text" ng-blur="myForm.my_field.$validate()">
</div>
Note that calling $validate has implications for your model. From the angular docs for ngModelCtrl.$validate:
Runs each of the registered validators (first synchronous validators and then asynchronous validators). If the validity changes to invalid, the model will be set to undefined, unless ngModelOptions.allowInvalid is true. If the validity changes to valid, it will set the model to the last available valid $modelValue, i.e. either the last parsed value or the last value set from the scope.
So if you're planning on doing something with the invalid model value (like popping a message telling them so), then you need to make sure allowInvalid is set to true for your model.
You can use Angular-Validator to do what you want. It's stupid simple to use.
It will:
Only validate the fields on $dirty or on submit
Prevent the form from being submitted if it is invalid
Show custom error message after the field is $dirty or the form is submitted
See the demo
Example
<form angular-validator
angular-validator-submit="myFunction(myBeautifulForm)"
name="myBeautifulForm">
<!-- form fields here -->
<button type="submit">Submit</button>
</form>
If the field does not pass the validator then the user will not be able to submit the form.
Check out angular-validator use cases and examples for more information.
Disclaimer: I am the author of Angular-Validator
Well, the angular way would be to let it handle validation, - since it does at every model change - and only show the result to the user, when you want.
In this case you decide when to show the errors, you just have to set a flag:
http://plnkr.co/edit/0NNCpQKhbLTYMZaxMQ9l?p=preview
As far as I know there is a issue filed to angular to let us have more advanced form control. Since it is not solved i would use this instead of reinventing all the existing validation methods.
edit: But if you insist on your way, here is your modified fiddle with validation before submit. http://plnkr.co/edit/Xfr7X6JXPhY9lFL3hnOw?p=preview
The controller broadcast an event when the button is clicked, and the directive does the validation magic.
One approach is to force all attributes to be dirty. You can do that in each controller, but it gets very messy. It would be better to have a general solution.
The easiest way I could think of was to use a directive
it will handle the form submit attribute
it iterates through all form fields and marks pristine fields dirty
it checks if the form is valid before calling the submit function
Here is the directive
myModule.directive('submit', function() {
return {
restrict: 'A',
link: function(scope, formElement, attrs) {
var form;
form = scope[attrs.name];
return formElement.bind('submit', function() {
angular.forEach(form, function(field, name) {
if (typeof name === 'string' && !name.match('^[\$]')) {
if (field.$pristine) {
return field.$setViewValue(field.$value);
}
}
});
if (form.$valid) {
return scope.$apply(attrs.submit);
}
});
}
};
});
And update your form html, for example:
<form ng-submit='justDoIt()'>
becomes:
<form name='myForm' novalidate submit='justDoIt()'>
See a full example here: http://plunker.co/edit/QVbisEK2WEbORTAWL7Gu?p=preview
Here is my global function for showing the form error messages.
function show_validation_erros(form_error_object) {
angular.forEach(form_error_object, function (objArrayFields, errorName) {
angular.forEach(objArrayFields, function (objArrayField, key) {
objArrayField.$setDirty();
});
});
};
And in my any controllers,
if ($scope.form_add_sale.$invalid) {
$scope.global.show_validation_erros($scope.form_add_sale.$error);
}
Based on Thilak's answer I was able to come up with this solution...
Since my form fields only show validation messages if a field is invalid, and has been touched by the user I was able to use this code triggered by a button to show my invalid fields:
// Show/trigger any validation errors for this step
angular.forEach(vm.rfiForm.stepTwo.$error, function(error) {
angular.forEach(error, function(field) {
field.$setTouched();
});
});
// Prevent user from going to next step if current step is invalid
if (!vm.rfiForm.stepTwo.$valid) {
isValid = false;
}
<!-- form field -->
<div class="form-group" ng-class="{ 'has-error': rfi.rfiForm.stepTwo.Parent_Suffix__c.$touched && rfi.rfiForm.stepTwo.Parent_Suffix__c.$invalid }">
<!-- field label -->
<label class="control-label">Suffix</label>
<!-- end field label -->
<!-- field input -->
<select name="Parent_Suffix__c" class="form-control"
ng-options="item.value as item.label for item in rfi.contact.Parent_Suffixes"
ng-model="rfi.contact.Parent_Suffix__c" />
<!-- end field input -->
<!-- field help -->
<span class="help-block" ng-messages="rfi.rfiForm.stepTwo.Parent_Suffix__c.$error" ng-show="rfi.rfiForm.stepTwo.Parent_Suffix__c.$touched">
<span ng-message="required">this field is required</span>
</span>
<!-- end field help -->
</div>
<!-- end form field -->
Note: I know this is a hack, but it was useful for Angular 1.2 and earlier that didn't provide a simple mechanism.
The validation kicks in on the change event, so some things like changing the values programmatically won't trigger it. But triggering the change event will trigger the validation. For example, with jQuery:
$('#formField1, #formField2').trigger('change');
I like the this approach in handling validation on button click.
There is no need to invoke anything from controller,
it's all handled with a directive.
on github
You can try this:
// The controller
$scope.submitForm = function(form){
//Force the field validation
angular.forEach(form, function(obj){
if(angular.isObject(obj) && angular.isDefined(obj.$setDirty))
{
obj.$setDirty();
}
})
if (form.$valid){
$scope.myResource.$save(function(data){
//....
});
}
}
<!-- FORM -->
<form name="myForm" role="form" novalidate="novalidate">
<!-- FORM GROUP to field 1 -->
<div class="form-group" ng-class="{ 'has-error' : myForm.field1.$invalid && myForm.field1.$dirty }">
<label for="field1">My field 1</label>
<span class="nullable">
<select name="field1" ng-model="myresource.field1" ng-options="list.id as list.name for list in listofall"
class="form-control input-sm" required>
<option value="">Select One</option>
</select>
</span>
<div ng-if="myForm.field1.$dirty" ng-messages="myForm.field1.$error" ng-messages-include="mymessages"></div>
</div>
<!-- FORM GROUP to field 2 -->
<div class="form-group" ng-class="{ 'has-error' : myForm.field2.$invalid && myForm.field2.$dirty }">
<label class="control-label labelsmall" for="field2">field2</label>
<input name="field2" min="1" placeholder="" ng-model="myresource.field2" type="number"
class="form-control input-sm" required>
<div ng-if="myForm.field2.$dirty" ng-messages="myForm.field2.$error" ng-messages-include="mymessages"></div>
</div>
</form>
<!-- ... -->
<button type="submit" ng-click="submitForm(myForm)">Send</button>
I done something following to make it work.
<form name="form" name="plantRegistrationForm">
<div ng-class="{ 'has-error': (form.$submitted || form.headerName.$touched) && form.headerName.$invalid }">
<div class="col-md-3">
<div class="label-color">HEADER NAME
<span class="red"><strong>*</strong></span></div>
</div>
<div class="col-md-9">
<input type="text" name="headerName" id="headerName"
ng-model="header.headerName"
maxlength="100"
class="form-control" required>
<div ng-show="form.$submitted || form.headerName.$touched">
<span ng-show="form.headerName.$invalid"
class="label-color validation-message">Header Name is required</span>
</div>
</div>
</div>
<button ng-click="addHeader(form, header)"
type="button"
class="btn btn-default pull-right">Add Header
</button>
</form>
In your controller you can do;
addHeader(form, header){
let self = this;
form.$submitted = true;
...
}
You need some css as well;
.label-color {
color: $gray-color;
}
.has-error {
.label-color {
color: rgb(221, 25, 29);
}
.select2-choice.ui-select-match.select2-default {
border-color: #e84e40;
}
}
.validation-message {
font-size: 0.875em;
}
.max-width {
width: 100%;
min-width: 100%;
}
To validate all fields of my form when I want, I do a validation on each field of $$controls like this :
angular.forEach($scope.myform.$$controls, function (field) {
field.$validate();
});

Angular form validation: ng-show when at least one input is ng-invalid and ng-dirty

I have the following form in an Angular partial:
<form name="submit_entry_form" id="submit_entry_form" ng-submit="submit()" ng-controller="SubmitEntryFormCtrl" novalidate >
<input type="text" name="first_name" ng-model="first_name" placeholder="First Name" required/><br />
<input type="text" name="last_name" ng-model="last_name" placeholder="Last Name" required/><br />
<input type="text" name="email" ng-model="email" placeholder="Email Address" required/><br />
<input type="text" name="confirm_email" ng-model="confirm_email" placeholder="Confirm Email Address" required/><br />
<span ng-show="submit_entry_form.$invalid">Error!</span>
<input type="submit" id="submit" value="Submit" />
</form>
The trouble I'm having is with the span at the bottom that says "Error!". I want this to show ONLY if one of the inputs is both "ng-dirty" and "ng-invalid". As it is above, the error will show until the form is completely valid. The long solution would be to do something like:
<span ng-show="submit_entry_form.first_name.$dirty && submit_entry_form.first_name.$invalid || submit_entry_form.last_name.$dirty && submit_entry_form.last_name.$invalid || submit_entry_form.email.$dirty && submit_entry_form.email.$invalid || submit_entry_form.confirm_email.$dirty && submit_entry_form.confirm_email.$invalid">Error!</span>
Which is UGLY. Any better way to do this?
Method 1: Use a function on $scope set up by your controller.
So with a better understanding of your problem, you wanted to show a message if any field on your form was both $invalid and $dirty...
Add a controller method:
app.controller('MainCtrl', function($scope) {
$scope.anyDirtyAndInvalid = function (form){
for(var prop in form) {
if(form.hasOwnProperty(prop)) {
if(form[prop].$dirty && form[prop].$invalid) {
return true;
}
}
}
return false;
};
});
and in your HTML:
<span ng-show="anyDirtyAndInvalid(submit_entry_form);">Error!</span>
Here is a plunker to demo it
Now all of that said, if someone has entered data in your form, and it's not complete, the form itself is invalid. So I'm not sure this is the best usability. But it should work.
Method 2: Use a Filter! (recommended)
I now recommend a filter for this sort of thing...
The following filter does the same as the above, but it's better practice for Angular, IMO. Also a plunk.
app.filter('anyInvalidDirtyFields', function () {
return function(form) {
for(var prop in form) {
if(form.hasOwnProperty(prop)) {
if(form[prop].$invalid && form[prop].$dirty) {
return true;
}
}
}
return false;
};
});
<span ng-show="submit_entry_form | anyInvalidDirtyFields">Error!</span>