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@ngdoc overview
@name Cookbook: Advanced Form
@description
Here we extend the basic form example to include common features such as reverting, dirty state
detection, and preventing invalid form submission.
<doc:example>
<doc:source>
<script>
function UserForm($scope) {
var master = {
name: 'John Smith',
address:{
line1: '123 Main St.',
city:'Anytown',
state:'AA',
zip:'12345'
},
contacts:[
{type:'phone', value:'1(234) 555-1212'}
]
};
$scope.state = /^\w\w$/;
$scope.zip = /^\d\d\d\d\d$/;
$scope.cancel = function() {
$scope.form = angular.copy(master);
};
$scope.save = function() {
master = $scope.form;
$scope.cancel();
};
$scope.addContact = function() {
$scope.form.contacts.push({type:'', value:''});
};
$scope.removeContact = function(index) {
$scope.form.contacts.splice(index, 1);
};
$scope.isCancelDisabled = function() {
return angular.equals(master, $scope.form);
};
$scope.isSaveDisabled = function() {
return $scope.myForm.$invalid || angular.equals(master, $scope.form);
};
$scope.cancel();
}
</script>
<div ng-controller="UserForm">
<form name="myForm">
<label>Name:</label><br/>
<input type="text" ng-model="form.name" required/> <br/><br/>
<label>Address:</label> <br/>
<input type="text" ng-model="form.address.line1" size="33" required/> <br/>
<input type="text" ng-model="form.address.city" size="12" required/>,
<input type="text" ng-model="form.address.state" size="2"
ng-pattern="state" required/>
<input type="text" ng-model="form.address.zip" size="5"
ng-pattern="zip" required/><br/><br/>
<label>Contacts:</label>
[ <a href="" ng-click="addContact()">add</a> ]
<div ng-repeat="contact in form.contacts">
<select ng-model="contact.type">
<option>email</option>
<option>phone</option>
<option>pager</option>
<option>IM</option>
</select>
<input type="text" ng-model="contact.value" required/>
[ <a href="" ng-click="removeContact($index)">X</a> ]
</div>
<button ng-click="cancel()" ng-disabled="isCancelDisabled()">Cancel</button>
<button ng-click="save()" ng-disabled="isSaveDisabled()">Save</button>
</form>
<hr/>
Debug View:
<pre>form={{form}}</pre>
</div>
</doc:source>
<doc:scenario>
it('should enable save button', function() {
expect(element(':button:contains(Save)').attr('disabled')).toBeTruthy();
input('form.name').enter('');
expect(element(':button:contains(Save)').attr('disabled')).toBeTruthy();
input('form.name').enter('change');
expect(element(':button:contains(Save)').attr('disabled')).toBeFalsy();
element(':button:contains(Save)').click();
expect(element(':button:contains(Save)').attr('disabled')).toBeTruthy();
});
it('should enable cancel button', function() {
expect(element(':button:contains(Cancel)').attr('disabled')).toBeTruthy();
input('form.name').enter('change');
expect(element(':button:contains(Cancel)').attr('disabled')).toBeFalsy();
element(':button:contains(Cancel)').click();
expect(element(':button:contains(Cancel)').attr('disabled')).toBeTruthy();
expect(element(':input[ng\\:model="form.name"]').val()).toEqual('John Smith');
});
</doc:scenario>
</doc:example>
#Things to notice
* Cancel & save buttons are only enabled if the form is dirty — there is something to cancel or
save.
* Save button is only enabled if there are no validation errors on the form.
* Cancel reverts the form changes back to original state.
* Save updates the internal model of the form.
* Debug view shows the two models. One presented to the user form and the other being the pristine
copy master.
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