AngularJS: Only post non-blank values - angularjs

Question

I am trying to $http.post a JSON object from a form. I can't seem to find the right syntax. Let's assume my form only takes one value (name). I use ng-model to bind the name to an object called modcampaign.name.
What's the correct syntax to post this to a http service?
Further, what if I had another input box, Description, and only want to bind this to modcampaign.description if the user entered data in the input box? If the input box is empty, I'd like to take the value for .description from another object (like modcampaign2.description).
<form ng-submit="modifyCampaign(selCampaign, newName)" class="form-horizontal" name="modCampaign">
<!-- Modify Name -->
<div class="form-group">
<label class="col-lg-2 control-label" for="modName">Name</label>
<div class="col-lg-8">
<input class="form-control" type="text" id="modName" ng-model="modCampaign.name"/>
</div>
</div>
</form>
This is the script file:
var myApp = angular.module('myApp', []);
myApp.controller('ListController', ['$scope', '$http', function($scope, $http) {
$http.get('js/campaigns.json').success(function (data) {
$scope.campaigns = data;
});
$http.post('js/campaign_mod.json').success(function (data) {
data = $scope.modCampaign;
});
$scope.selCampaign={};
$scope.selectCampaign = function (campaign) {
$scope.toggleCampaign = !$scope.toggleCampaign;
$scope.selCampaign = campaign;
};
$scope.abbrechen = function () {
$scope.toggleCampaign = !$scope.toggleCampaign;
};
$scope.submit = function () {
$http.post('')
}
}]);

Answer 1

You can include something like this in your controller:
$scope.modCampaign = {};
//this gets called on ng-submit
$scope.submitData = function(){
$http.post("api-end-point", $scope.modCompaign).success(function(data, status) {
//handle response etc.
});
}
Your html will have something like this:
<form ng-submit="submitData()" class="form-horizontal" name="modCampaign">
<!-- Modify Name -->
<div class="form-group">
<label class="col-lg-2 control-label" for="modName">Name</label>
<div class="col-lg-8">
<input class="form-control" type="text" id="modName" ng-model="modCampaign.name"/>
<textarea ng-model="modCampaign.description"/></textarea>
</div>
</div>
</form>

Answer 2

you can use JSON.stringify()
example
$http({
method: "POST",
url: 'http://www.example.com/posturl',
data : JSON.stringify($scope.modcampaign)
}).success(function(response){
console.log(response);
// write any action after post success
})

Answer 3

<form ng-submit="modifyCampaign(modCampaign)" class="form-horizontal" name="modCampaign">
<!-- Modify Name -->
<div class="form-group">
<label class="col-lg-2 control-label" for="modName">Name</label>
<div class="col-lg-8">
<input class="form-control" type="text" id="modName" ng-model="modCampaign.name"/>
</div>
</div>
<div class="form-group">
<label class="col-lg-2 control-label" for="modDescription">Description</label>
<div class="col-lg-8">
<input class="form-control" type="text" id="modDescription" ng-model="modCampaign.description"/>
</div>
</div>
</form>
var myApp = angular.module('myApp', []);
myApp.controller('ListController', ['$scope', '$http', function($scope, $http) {
$scope.modifyCampaign = function(modCampaign) {
console.log(modCampaign)
alert(modCampaign.name) // name:"jane"
alert(modCampaign.description) // description: "hello"
$http.post('js/campaign_mod.json', { name: modCampaign.name, description: modCampaign.description }).success(function (data) {
console.log(data)
});
}
}]);
This method lets you bind all the form value to one object and then you can decode the value in your controller file, below is a link to a working example
http://codepen.io/anon/pen/VjYLvg