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@workInProgress
@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() {
this.state = /^\w\w$/;
this.zip = /^\d\d\d\d\d$/;
this.master = {
name: 'John Smith',
address:{
line1: '123 Main St.',
city:'Anytown',
state:'AA',
zip:'12345'
},
contacts:[
{type:'phone', value:'1(234) 555-1212'}
]
};
this.cancel();
}
UserForm.prototype = {
cancel: function() {
this.form = angular.copy(this.master);
},
save: function() {
this.master = this.form;
this.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="form.contacts.$add()">add</a> ]
<div ng:repeat="contact in form.contacts">
<select ng:model="contact.type">
<option>email</option>
<option>phone</option>
<option>pager</option>
<option>IM</option>
</select>
<input type="text" ng:model="contact.value" required/>
[ <a href="" ng:click="form.contacts.$remove(contact)">X</a> ]
</div>
<button ng:click="cancel()" ng:disabled="{{master.$equals(form)}}">Cancel</button>
<button ng:click="save()" ng:disabled="{{myForm.$invalid || master.$equals(form)}}">Save</button>
</form>
<hr/>
Debug View:
<pre>form={{form}}
master={{master}}</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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