I have set of data fields.
They look like this:
// Read-Only
<div class="field-group" ng-if="feature.edit == false">
<div class="label" ng-class="{'feature-required': field.Validations.Required === true}">{{field.Label}}</div>
<div class="value">{{field.Value}}</div>
</div>
// Editor
<div class="field-group" ng-show="feature.edit == true">
<label for="F{{field.FieldID}}">
<span ng-class="{'feature-required': field.Validations.Required === true, 'feature-notrequired': field.Validations.Required === false}">{{field.Label}}</span>
<input type="text"
id="F{{field.FieldID}}"
name="F{{field.FieldID}}"
ng-change="onFieldUpdate()"
ng-model="field.Value"
jd-field-attributes attr-field="field"
jd-validate on-error="onFieldError"
field="field">
</label>
</div>
feature.edit is controlled by button and you can have data read-olny or editable. Each field has some validation, usually, if required it must be different than null.
I want to trigger that validation after I click edit and input fields show up.
One way to do it is to loop through all input fields and use jQuery trigger("change"). I have to do it with some delay (it takes Angular to populate all fields).
Is there any way to trigger ng-change or run onFieldUpdate(), after that input becomes visible?
I have tried ng-init, but it didn't work.
You could move your validation logic to custom validators in the ngModel $validators pipeline. Functions you add to this pipeline will evaluate against the input model value every time it changes and automatically add the associated valid/invalid classes to the input.
Here's an example of how you can add custom validators:
app.directive('moreValidation', function() {
return {
restrict: 'A',
require: 'ngModel',
link: function(scope, element, attributes, ngModel) {
ngModel.$validators.first = function(input) {
return true; // add your custom logic here
}
ngModel.$validators.second = function(input) {
return true;
}
ngModel.$validators.third = function(input) {
return true;
}
}
};
});
// markup
<input type="text" ng-model="modelObject" more-validation />
Here's a small working plnkr example: http://plnkr.co/edit/mKKuhNqcnGXQ4sMePrym?p=preview
AngularJS provides what they call 'model flags' on their forms. For example, you can have formName.$dirty, formName.$invalid, etc. What I want to know is how can I create my own custom flag for my AngularJS forms? A high level demonstration or link to an article would be a sufficient answer.
See here: how-to-add-custom-validation-to-an-angular-js-form.
In short, this is a custom valitation directive example:
app.directive('blacklist', function (){
return {
require: 'ngModel',
link: function(scope, elem, attr, ngModel) {
var blacklist = attr.blacklist.split(',');
// for DOM -> model validation
ngModel.$parsers.unshift(function(value) {
var valid = blacklist.indexOf(value) === -1;
ngModel.$setValidity('blacklist', valid);
return valid ? value : undefined;
});
//For model -> DOM validation
ngModel.$formatters.unshift(function(value) {
ngModel.$setValidity('blacklist', blacklist.indexOf(value) === -1);
return value;
});
}
};
});
And this it's an example of it's usage:
<form name="myForm" ng-submit="doSomething()">
<input type="text" name="fruitName" ng-model="data.fruitName" blacklist="coconuts,bananas,pears" required/>
<span ng-show="myForm.fruitName.$error.blacklist">
The phrase "{{data.fruitName}}" is blacklisted</span>
<span ng-show="myForm.fruitName.$error.required">required</span>
<button type="submit" ng-disabled="myForm.$invalid">Submit</button>
</form>
But, again, read the referenced question and accepted answer, it's by far more complete...
I have the following ngRepeat code:
<div ng-repeat="drug in drugs | orderBy:'drugName'">
<input id="{{drug.drugName}}"
class="drugCheckbox"
name="{{drug.drugName}}"
type="checkbox" value="{{drug.drugName}}"
ng-model="foobar"
validate-foo
/>
{{drug.drugName}}
<!-- this is the error message, one per each repeat element -->
<span style="color:red" ng-show="myForm.{{drug.drugName}}.$error.summary">
Fill in the summary
</span>
<input type="text"
name="summary-{{drug.drugName}}"
id="summary-{{drug.drugName}}"
placeholder="Summary"/>
</div>
My validateFoo directive:
app.directive('validateFoo', function(){
return{
restrict: 'A',
require: 'ngModel',
link: function(scope, elem, attr, ctrl) {
ctrl.$parsers.unshift(function (viewValue) {
var id= attr.id;
//if the checkbox is checked, see if the text field has been filled in
if(viewValue) {
var val= document.getElementById('summary-' + id).value;
if(val.length == 0) {
ctrl.$setValidity("summary", false);
return undefined;
}
else {
ctrl.$setValidity(id, true);
return viewValue;
}
}
});
}
}
});
I cannot get the validation to work for any of the checkboxes, I am not clear on what to use for "ng-show" in the error message span element.
First of all that's because all fields will be registered in your formController under name {{drug.drugName}}.
Second thing is that there is no myForm.{{drug.drugName}}.$invalid in scope. You probably tried to do myForm[drug.drugName].$invalid. But it will not work anyway - look at 1.
I think that there still is no proper way to set name field dynamically in ng-repeat. Instead you need to create tour own directive, that will build repeated list elements as String, then append it to your HTML and $compile it place.
EDIT
I have developed one solution:
http://jsfiddle.net/ulfryk/gejfeLp7/
EDIT 2:
I've developed even simpler solution ( http://jsfiddle.net/ulfryk/5wq7539r/ ):
app.directive('fixRepeatedModelName', function () {
return {
link: function (scope, element, attrs, ngModelCtrl) {
if (!attrs.name) return;
ngModelCtrl.$name = attrs.name;
},
priority: '-100',
require: 'ngModel'
};
});
And add fix-repeated-model-name attribute to any ng-model with dynamic ({{ }} dependent) name placed inside ng-repeat. And it now works :)
DEMO
Consider the following example:
<input type="text" ng-model="client.phoneNumber" phone-number>
<button ng-click="doSomething()">Do Something</button>
.directive("phoneNumber", function($compile) {
return {
restrict: 'A',
scope: true,
link: function(scope, element, attrs) {
scope.mobileNumberIsValid = true;
var errorTemplate = "<span ng-show='!mobileNumberIsValid'>Error</span>";
element.after($compile(errorTemplate)(scope)).on('blur', function() {
scope.$apply(function() {
scope.mobileNumberIsValid = /^\d*$/.test(element.val());
});
});
}
};
});
Looking at the demo, if you add say 'a' at the end of the phone number, and click the button, doSomething() is not called. If you click the button again, then doSomething() is called.
Why doSomething() is not called for the first time? Any ideas how to fix this?
Note: It is important to keep the validation on blur.
Explain
Use click button, mousedown event is triggered on button element.
Input is on blur, blur callback triggered to validate input value.
If invalid, error span is displayed, pushing button tag down, thus cursor left button area. If user release mouse, mouseup event is not triggered. This acts like click on a button but move outside of it before releasing mouse to cancel the button click. This is the reason ng-click is not triggered. Because mouseup event is not triggered on button.
Solution
Use ng-pattern to dynamically validate the input value, and show/hide error span immediately according to ngModel.$invalid property.
Demo 1 http://jsbin.com/epEBECAy/14/edit
----- Update 1 -----
According to author's request, updated answer with another solution.
Demo 2 http://jsbin.com/epEBECAy/21/edit?html,js
HTML
<body ng-app="Demo" ng-controller="DemoCtrl as demoCtrl">
<pre>{{ client | json }}</pre>
<div id="wrapper">
<input type="text" phone-number
ng-model="client.phoneNumber"
ng-blur="demoCtrl.validateInput(client.phoneNumber)">
</div>
<button ng-mousedown="demoCtrl.pauseValidation()"
ng-mouseup="demoCtrl.resumeValidation()"
ng-click="doSomething()">Do Something</button>
</body>
Logic
I used ng-blur directive on input to trigger validation. If ng-mousedown is triggered before ng-blur, ng-blur callback will be deferred until ng-mouseup is fired. This is accomplished by utilizing $q service.
Here: http://jsbin.com/epEBECAy/25/edit
As explained by other answers, the button is moved by the appearance of the span before an onmouseup event on the button occurs, thus causing the issue you are experiencing. The easiest way to accomplish what you want is to style the form in such a way that the appearance of the span does not cause the button to move (this is a good idea in general from a UX perspective). You can do this by wrapping the input element in a div with a style of white-space:nowrap. As long as there is enough horizontal space for the span, the button will not move and the ng-click event will work as expected.
<div id="wrapper">
<div style='white-space:nowrap;'>
<input type="text" ng-model="client.phoneNumber" phone-number>
</div>
<button ng-click="doSomething()">Do Something</button>
</div>
It is because the directive is inserting the <span>Error</span> underneath where the button is currently placed, interfering with the click event location. You can see this by moving the button above the text box, and everything should work fine.
EDIT:
If you really must have the error in the same position, and solve the issue without creating your own click directive, you can use ng-mousedown instead of ng-click. This will trigger the click code before handling the blur event.
Not a direct answer, but a suggestion for writing the directive differently (the html is the same):
http://jsbin.com/OTELeFe/1/
angular.module("Demo", [])
.controller("DemoCtrl", function($scope) {
$scope.client = {
phoneNumber: '0451785986'
};
$scope.doSomething = function() {
console.log('Doing...');
};
})
.directive("phoneNumber", function($compile) {
var errorTemplate = "<span ng-show='!mobileNumberIsValid'> Error </span>";
var link = function(scope, element, attrs) {
$compile(element.find("span"))(scope);
scope.mobileNumberIsValid = true;
scope.$watch('ngModel', function(v){
scope.mobileNumberIsValid = /^\d*$/.test(v);
});
};
var compile = function(element, attrs){
var h = element[0].outerHTML;
var newHtml = [
'<div>',
h.replace('phone-number', ''),
errorTemplate,
'</div>'
].join("\n");
element.replaceWith(newHtml);
return link;
};
return {
scope: {
ngModel: '='
},
compile: compile
};
});
I would suggest using $parsers and $setValidity way while validating phone number.
app.directive('phoneNumber', function () {
return {
restrict: 'A',
require: '?ngModel',
link: function(scope, element, attrs, ctrl) {
if (!ctrl) return;
ctrl.$parsers.unshift(function(viewValue) {
var valid = /^\d*$/.test(viewValue);
ctrl.$setValidity('phoneNumber', valid);
return viewValue;
});
ctrl.$formatters.unshift(function(modelValue) {
var valid = /^\d*$/.test(modelValue);
ctrl.$setValidity('phoneNumber', valid);
return modelValue;
});
}
}
});
So, you will be able to use $valid property on a field in your view:
<form name="form" ng-submit="doSomething()" novalidate>
<input type="text" name="phone" ng-model="phoneNumber" phone-number/>
<p ng-show="form.phone.$invalid">(Show on error)Wrong phone number</p>
</form>
If you want to show errors only on blur you can use (found here: AngularJS Forms - Validate Fields After User Has Left Field):
var focusDirective = function () {
return {
restrict: 'E',
require: '?ngModel',
link: function (scope, element, attrs, ctrl) {
var elm = $(element);
if (!ctrl) return;
elm.on('focus', function () {
elm.addClass('has-focus');
ctrl.$hasFocus = true;
if(!scope.$$phase) scope.$digest();
});
elm.on('blur', function () {
elm.removeClass('has-focus');
elm.addClass('has-visited');
ctrl.$hasFocus = false;
ctrl.$hasVisited = true;
if(!scope.$$phase) scope.$digest();
});
elm.closest('form').on('submit', function () {
elm.addClass('has-visited');
ctrl.$hasFocus = false;
ctrl.$hasVisited = true;
if(!scope.$$phase) scope.$digest();
})
}
}
};
app.directive('input', focusDirective);
So, you will have hasFocus property if field is focused now and hasVisited property if that field blured one or more times:
<form name="form" ng-submit="doSomething()" novalidate>
<input type="text" name="phone" ng-model="phoneNumber" phone-number/>
<p ng-show="form.phone.$invalid">[error] Wrong phone number</p>
<p ng-show="form.phone.$invalid
&& form.phone.$hasVisited">[error && visited] Wrong phone number</p>
<p ng-show="form.phone.$invalid
&& !form.phone.$hasFocus">[error && blur] Wrong phone number</p>
<div><input type="submit" value="Submit"/></div>
</form>
Demo: http://jsfiddle.net/zVpWh/4/
I fixed it with the following.
<button class="submitButton form-control" type="submit" ng-mousedown="this.form.submit();" >
I have a form with input fields and validation setup by adding the required attributes and such. But for some fields I need to do some extra validation. How would I "tap in" to the validation that FormController controls?
Custom validation could be something like "if these 3 fields are filled in, then this field is required and needs to be formatted in a particular way".
There's a method in FormController.$setValidity but that doesn't look like a public API so I rather not use it. Creating a custom directive and using NgModelController looks like another option, but would basically require me to create a directive for each custom validation rule, which I do not want.
Actually, marking a field from the controller as invalid (while also keeping FormController in sync) might be the thing that I need in the simplest scenario to get the job done, but I don't know how to do that.
Edit: added information about ngMessages (>= 1.3.X) below.
Standard form validation messages (1.0.X and above)
Since this is one of the top results if you Google "Angular Form Validation", currently, I want to add another answer to this for anyone coming in from there.
There's a method in FormController.$setValidity but that doesn't look like a public API so I rather not use it.
It's "public", no worries. Use it. That's what it's for. If it weren't meant to be used, the Angular devs would have privatized it in a closure.
To do custom validation, if you don't want to use Angular-UI as the other answer suggested, you can simply roll your own validation directive.
app.directive('blacklist', function (){
return {
require: 'ngModel',
link: function(scope, elem, attr, ngModel) {
var blacklist = attr.blacklist.split(',');
//For DOM -> model validation
ngModel.$parsers.unshift(function(value) {
var valid = blacklist.indexOf(value) === -1;
ngModel.$setValidity('blacklist', valid);
return valid ? value : undefined;
});
//For model -> DOM validation
ngModel.$formatters.unshift(function(value) {
ngModel.$setValidity('blacklist', blacklist.indexOf(value) === -1);
return value;
});
}
};
});
And here's some example usage:
<form name="myForm" ng-submit="doSomething()">
<input type="text" name="fruitName" ng-model="data.fruitName" blacklist="coconuts,bananas,pears" required/>
<span ng-show="myForm.fruitName.$error.blacklist">
The phrase "{{data.fruitName}}" is blacklisted</span>
<span ng-show="myForm.fruitName.$error.required">required</span>
<button type="submit" ng-disabled="myForm.$invalid">Submit</button>
</form>
Note: in 1.2.X it's probably preferrable to substitute ng-if for ng-show above
Here is an obligatory plunker link
Also, I've written a few blog entries about just this subject that goes into a little more detail:
Angular Form Validation
Custom Validation Directives
Edit: using ngMessages in 1.3.X
You can now use the ngMessages module instead of ngShow to show your error messages. It will actually work with anything, it doesn't have to be an error message, but here's the basics:
Include <script src="angular-messages.js"></script>
Reference ngMessages in your module declaration:
var app = angular.module('myApp', ['ngMessages']);
Add the appropriate markup:
<form name="personForm">
<input type="email" name="email" ng-model="person.email" required/>
<div ng-messages="personForm.email.$error">
<div ng-message="required">required</div>
<div ng-message="email">invalid email</div>
</div>
</form>
In the above markup, ng-message="personForm.email.$error" basically specifies a context for the ng-message child directives. Then ng-message="required" and ng-message="email" specify properties on that context to watch. Most importantly, they also specify an order to check them in. The first one it finds in the list that is "truthy" wins, and it will show that message and none of the others.
And a plunker for the ngMessages example
Angular-UI's project includes a ui-validate directive, which will probably help you with this. It let's you specify a function to call to do the validation.
Have a look at the demo page: http://angular-ui.github.com/, search down to the Validate heading.
From the demo page:
<input ng-model="email" ui-validate='{blacklist : notBlackListed}'>
<span ng-show='form.email.$error.blacklist'>This e-mail is black-listed!</span>
then in your controller:
function ValidateCtrl($scope) {
$scope.blackList = ['bad#domain.example','verybad#domain.example'];
$scope.notBlackListed = function(value) {
return $scope.blackList.indexOf(value) === -1;
};
}
You can use ng-required for your validation scenario ("if these 3 fields are filled in, then this field is required":
<div ng-app>
<input type="text" ng-model="field1" placeholder="Field1">
<input type="text" ng-model="field2" placeholder="Field2">
<input type="text" ng-model="field3" placeholder="Field3">
<input type="text" ng-model="dependentField" placeholder="Custom validation"
ng-required="field1 && field2 && field3">
</div>
You can use Angular-Validator.
Example: using a function to validate a field
<input type = "text"
name = "firstName"
ng-model = "person.firstName"
validator = "myCustomValidationFunction(form.firstName)">
Then in your controller you would have something like
$scope.myCustomValidationFunction = function(firstName){
if ( firstName === "John") {
return true;
}
You can also do something like this:
<input type = "text"
name = "firstName"
ng-model = "person.firstName"
validator = "'!(field1 && field2 && field3)'"
invalid-message = "'This field is required'">
(where field1 field2, and field3 are scope variables. You might also want to check if the fields do not equal the empty string)
If the field does not pass the validator then the field will be marked as invalid and the user will not be able to submit the form.
For more use cases and examples see: https://github.com/turinggroup/angular-validator
Disclaimer: I am the author of Angular-Validator
I recently created a directive to allow for expression-based invalidation of angular form inputs. Any valid angular expression can be used, and it supports custom validation keys using object notation. Tested with angular v1.3.8
.directive('invalidIf', [function () {
return {
require: 'ngModel',
link: function (scope, elm, attrs, ctrl) {
var argsObject = scope.$eval(attrs.invalidIf);
if (!angular.isObject(argsObject)) {
argsObject = { invalidIf: attrs.invalidIf };
}
for (var validationKey in argsObject) {
scope.$watch(argsObject[validationKey], function (newVal) {
ctrl.$setValidity(validationKey, !newVal);
});
}
}
};
}]);
You can use it like this:
<input ng-model="foo" invalid-if="{fooIsGreaterThanBar: 'foo > bar',
fooEqualsSomeFuncResult: 'foo == someFuncResult()'}/>
Or by just passing in an expression (it will be given the default validationKey of "invalidIf")
<input ng-model="foo" invalid-if="foo > bar"/>
Here's a cool way to do custom wildcard expression validations in a form (from: Advanced form validation with AngularJS and filters):
<form novalidate="">
<input type="text" id="name" name="name" ng-model="newPerson.name"
ensure-expression="(persons | filter:{name: newPerson.name}:true).length !== 1">
<!-- or in your case:-->
<input type="text" id="fruitName" name="fruitName" ng-model="data.fruitName"
ensure-expression="(blacklist | filter:{fruitName: data.fruitName}:true).length !== 1">
</form>
app.directive('ensureExpression', ['$http', '$parse', function($http, $parse) {
return {
require: 'ngModel',
link: function(scope, ele, attrs, ngModelController) {
scope.$watch(attrs.ngModel, function(value) {
var booleanResult = $parse(attrs.ensureExpression)(scope);
ngModelController.$setValidity('expression', booleanResult);
});
}
};
}]);
jsFiddle demo (supports expression naming and multiple expressions)
It's similar to ui-validate, but you don't need a scope specific validation function (this works generically) and ofcourse you don't need ui.utils this way.
#synergetic I think #blesh suppose to put function validate as below
function validate(value) {
var valid = blacklist.indexOf(value) === -1;
ngModel.$setValidity('blacklist', valid);
return valid ? value : undefined;
}
ngModel.$formatters.unshift(validate);
ngModel.$parsers.unshift(validate);
Update:
Improved and simplified version of previous directive (one instead of two) with same functionality:
.directive('myTestExpression', ['$parse', function ($parse) {
return {
restrict: 'A',
require: 'ngModel',
link: function (scope, element, attrs, ctrl) {
var expr = attrs.myTestExpression;
var watches = attrs.myTestExpressionWatch;
ctrl.$validators.mytestexpression = function (modelValue, viewValue) {
return expr == undefined || (angular.isString(expr) && expr.length < 1) || $parse(expr)(scope, { $model: modelValue, $view: viewValue }) === true;
};
if (angular.isString(watches)) {
angular.forEach(watches.split(",").filter(function (n) { return !!n; }), function (n) {
scope.$watch(n, function () {
ctrl.$validate();
});
});
}
}
};
}])
Example usage:
<input ng-model="price1"
my-test-expression="$model > 0"
my-test-expression-watch="price2,someOtherWatchedPrice" />
<input ng-model="price2"
my-test-expression="$model > 10"
my-test-expression-watch="price1"
required />
Result: Mutually dependent test expressions where validators are executed on change of other's directive model and current model.
Test expression has local $model variable which you should use to compare it to other variables.
Previously:
I've made an attempt to improve #Plantface code by adding extra directive. This extra directive very useful if our expression needs to be executed when changes are made in more than one ngModel variables.
.directive('ensureExpression', ['$parse', function($parse) {
return {
restrict: 'A',
require: 'ngModel',
controller: function () { },
scope: true,
link: function (scope, element, attrs, ngModelCtrl) {
scope.validate = function () {
var booleanResult = $parse(attrs.ensureExpression)(scope);
ngModelCtrl.$setValidity('expression', booleanResult);
};
scope.$watch(attrs.ngModel, function(value) {
scope.validate();
});
}
};
}])
.directive('ensureWatch', ['$parse', function ($parse) {
return {
restrict: 'A',
require: 'ensureExpression',
link: function (scope, element, attrs, ctrl) {
angular.forEach(attrs.ensureWatch.split(",").filter(function (n) { return !!n; }), function (n) {
scope.$watch(n, function () {
scope.validate();
});
});
}
};
}])
Example how to use it to make cross validated fields:
<input name="price1"
ng-model="price1"
ensure-expression="price1 > price2"
ensure-watch="price2" />
<input name="price2"
ng-model="price2"
ensure-expression="price2 > price3"
ensure-watch="price3" />
<input name="price3"
ng-model="price3"
ensure-expression="price3 > price1 && price3 > price2"
ensure-watch="price1,price2" />
ensure-expression is executed to validate model when ng-model or any of ensure-watch variables is changed.
Custom Validations that call a Server
Use the ngModelController $asyncValidators API which handles asynchronous validation, such as making an $http request to the backend. Functions added to the object must return a promise that must be resolved when valid or rejected when invalid. In-progress async validations are stored by key in ngModelController.$pending. For more information, see AngularJS Developer Guide - Forms (Custom Validation).
ngModel.$asyncValidators.uniqueUsername = function(modelValue, viewValue) {
var value = modelValue || viewValue;
// Lookup user by username
return $http.get('/api/users/' + value).
then(function resolved() {
//username exists, this means validation fails
return $q.reject('exists');
}, function rejected() {
//username does not exist, therefore this validation passes
return true;
});
};
For more information, see
ngModelController $asyncValidators API
AngularJS Developer Guide - Forms (Custom Validation).
Using the $validators API
The accepted answer uses the $parsers and $formatters pipelines to add a custom synchronous validator. AngularJS 1.3+ added a $validators API so there is no need to put validators in the $parsers and $formatters pipelines:
app.directive('blacklist', function (){
return {
require: 'ngModel',
link: function(scope, elem, attr, ngModel) {
ngModel.$validators.blacklist = function(modelValue, viewValue) {
var blacklist = attr.blacklist.split(',');
var value = modelValue || viewValue;
var valid = blacklist.indexOf(value) === -1;
return valid;
});
}
};
});
For more information, see AngularJS ngModelController API Reference - $validators.
In AngularJS the best place to define Custom Validation is Cutsom directive.
AngularJS provide a ngMessages module.
ngMessages is a directive that is designed to show and hide messages
based on the state of a key/value object that it listens on. The
directive itself complements error message reporting with the ngModel
$error object (which stores a key/value state of validation errors).
For custom form validation One should use ngMessages Modules with custom directive.Here i have a simple validation which will check if number length is less then 6 display an error on screen
<form name="myform" novalidate>
<table>
<tr>
<td><input name='test' type='text' required ng-model='test' custom-validation></td>
<td ng-messages="myform.test.$error"><span ng-message="invalidshrt">Too Short</span></td>
</tr>
</table>
</form>
Here is how to create custom validation directive
angular.module('myApp',['ngMessages']);
angular.module('myApp',['ngMessages']).directive('customValidation',function(){
return{
restrict:'A',
require: 'ngModel',
link:function (scope, element, attr, ctrl) {// 4th argument contain model information
function validationError(value) // you can use any function and parameter name
{
if (value.length > 6) // if model length is greater then 6 it is valide state
{
ctrl.$setValidity('invalidshrt',true);
}
else
{
ctrl.$setValidity('invalidshrt',false) //if less then 6 is invalide
}
return value; //return to display error
}
ctrl.$parsers.push(validationError); //parsers change how view values will be saved in the model
}
};
});
$setValidity is inbuilt function to set model state to valid/invalid
I extended #Ben Lesh's answer with an ability to specify whether the validation is case sensitive or not (default)
use:
<input type="text" name="fruitName" ng-model="data.fruitName" blacklist="Coconuts,Bananas,Pears" caseSensitive="true" required/>
code:
angular.module('crm.directives', []).
directive('blacklist', [
function () {
return {
restrict: 'A',
require: 'ngModel',
scope: {
'blacklist': '=',
},
link: function ($scope, $elem, $attrs, modelCtrl) {
var check = function (value) {
if (!$attrs.casesensitive) {
value = (value && value.toUpperCase) ? value.toUpperCase() : value;
$scope.blacklist = _.map($scope.blacklist, function (item) {
return (item.toUpperCase) ? item.toUpperCase() : item
})
}
return !_.isArray($scope.blacklist) || $scope.blacklist.indexOf(value) === -1;
}
//For DOM -> model validation
modelCtrl.$parsers.unshift(function (value) {
var valid = check(value);
modelCtrl.$setValidity('blacklist', valid);
return value;
});
//For model -> DOM validation
modelCtrl.$formatters.unshift(function (value) {
modelCtrl.$setValidity('blacklist', check(value));
return value;
});
}
};
}
]);
Some great examples and libs presented in this thread, but they didn't quite have what I was looking for. My approach: angular-validity -- a promise based validation lib for asynchronous validation, with optional Bootstrap styling baked-in.
An angular-validity solution for the OP's use case might look something like this:
<input type="text" name="field4" ng-model="field4"
validity="eval"
validity-eval="!(field1 && field2 && field3 && !field4)"
validity-message-eval="This field is required">
Here's a Fiddle, if you want to take it for a spin. The lib is available on GitHub, has detailed documentation, and plenty of live demos.