AngularJS form data to Ruby on Rails API - ruby-on-rails

I created a simple API with Ruby on Rails,and I'm trying to send data from a form with AngularJS. The thing is that the App is sending the post method and the backend is creating the new records, so far it's working, but it creates it with Null values.
This is the form:
<div ng-controller="postController">
<form name="messageForm" ng-submit="submitForm()">
<div class="form-group">
<label>Name</label>
<input type="text" name="content" class="form-control" ng-model="message.content">
</div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
</div>
This is the Angular Controller:
app.controller('postController', function($scope, $http) {
// create a blank object to handle form data.
$scope.message = {};
// calling our submit function.
$scope.submitForm = function() {
$http({
method : 'POST',
url : 'http://localhost:3000/api/v1/messages',
data : $scope.message, //forms user object
headers : {'Content-Type': 'application/x-www-form-urlencoded'}
})
.success(function(data) {
if (data.errors) {
// Showing errors.
$scope.errorContent = data.errors.errorContent;
} else {
$scope.message = data.message;
}
});
};
});
And in the RoR's API Controller, this is the Create method:
def create
respond_with Message.create(params[:message])
end
The only rows are:
ID which is generated automatically.
And 'content'

You must assign a key to your message object in data parameter, like this:
$http({
method : 'POST',
url : 'http://localhost:3000/api/v1/messages',
data : { data: $scope.message },
headers : {'Content-Type': 'application/x-www-form-urlencoded'}
})
.sucess(function(data){ ... });
And then, in your controller:
def create
respond_with Message.create(params[:data])
end
Hope this help :)

Related

Live search MVC

I'm looking for live search for ASP.NET and entity framework. I'm a little bit green with it. I read that it needs to use ajax, but I never used it before and can't get good example. Here is a piece of code, cshtml (part of textbox)
<div class="form-horizontal">
<hr />
<h4>Search for a client: </h4>
<div class="input-group">
<span class="input-group-addon" id="Name">
<span class="glyphicon glyphicon-user" aria-hidden="true"></span>
</span>
#Html.TextBox("Name", "", new { #class = "form-control", placeholder = "Name" })
</div>
<div><h6></h6></div>
<div class="input-group">
<span class="input-group-addon" id="Surname">
<span class="glyphicon glyphicon-user" aria-hidden="true"></span>
</span>
#Html.TextBox("Surname", "", new { #class = "form-control", placeholder = "Surname" })
</div>
<div><h6></h6></div>
<button type="submit" class="btn btn-default" data-toggle="modal" data-target="#infoModal">Search</button>
</div>
this is a part of controller:
public ActionResult Index(string Name, string Surname)
{
var SearchList = from m in db.Klienci
select m;
if (!String.IsNullOrEmpty(Name))
{
SearchList = SearchList.Where(s => s.Name.Contains(Name));
}
if (!String.IsNullOrEmpty(Surname))
{
SearchList = SearchList.Where(s => s.Nazwisko.Contains(Surname));
}
return View(SearchList);
}
So it search for me clients by name and surname, but it refresh full page when it lost focus or after clicking the button. How to solve it, to get live search? after each keystroke search through database? I'm a little bit green, would you Help me?
You can listen to the keyup event on your input element, read the value and send it to the server using ajax. Return the results and in the ajax call's success callback, update the ui with the results.
$(function() {
$("#Name,#SurName").keyup(function(e) {
var n = $("#Name").val();
var sn = $("#SurName").val();
$.get("/Home/Index?Name="+n+"&SurName="+sn,function(r){
//update ui with results
$("#resultsTable").html(r);
});
});
});
The code basically listens to the key up event on the two input textboxes and read the values and send to the /Home/Index action method using jquery get method asynchronously.When the action method returns the response, we update the DOM.
Assuming resultsTable is the Id of the table where we list the results.
Also, since you are returning the partial view result ( without layout headers), you should use return PartialView() instead of return View()
if(Request.IsAjaxRequest())
return PartialView(SearchList);
return View(SearchList);
Here is nice example/tutorial how to use Ajax with ASP.NET MVC
http://www.itorian.com/2013/02/jquery-ajax-get-and-post-calls-to.html
EDITED: 2016-07-20
Example:
$(function () {
$("searchField").keyup(function () {
$.ajax({
type: "POST",
url: "/Controller/Action",
data: data,
datatype: "html",
success: function (data) {
$('#result').html(data);
}
});
});
You have to visit the server to get data from server and without ajax it is not possible. Now the question is how to make ajax call, you can use jQuery js lib to do but I would recommend you to try angular as data binding in angular will fulfill your needs.
Take a look at followings links
Angular Ajax Service -
jQuery Ajax

How to update a resource using AngulaJS Rails Resource

I'm using AngularJS Rails Resource and have it configured like so:
angular.module('admin')
.factory('Page', ['railsResourceFactory', 'API_PROVIDER', function(railsResourceFactory, API_PROVIDER) {
return railsResourceFactory({
url: API_PROVIDER.full_path + 'pages', //which resolves to https://example/api/pages
name: 'page'
});
}]);
And in my controller:
(function() {
'use strict';
angular
.module('admin')
.controller('PagesEditController', PagesEditController);
/** #ngInject */
function PagesEditController($timeout, webDevTec, toastr, $scope, $moment, Page, Session, $http, $location, $anchorScroll, $stateParams) {
$http.defaults.headers.common.Authorization = 'Token token='+ Session.token;
var page = Page.get($stateParams.pageId).then(function (result) {
$scope.editPage = result;
});
$scope.savePage = function (page) {
page.update();
}
}
})();
In my view I have:
...
<input type="text" ng-model='editPage.title' class="form-control underline-input">
<button ng-click='savePage(editPage)' class="btn btn-green btn-ef btn-ef-7 btn-ef-7h" activate-button="success"><i class="fa fa-envelope"></i> Save page</button>
...
EDIT: My save function:
$scope.savePage = function (page) {
Page.get($stateParams.pageId).then(function (result) {
result.title = $scope.editPage.title;
result.content = $scope.editPage.content;
result.update();
})
}
But its not working. I get an error like so: No route matches [PUT] "/api/pages" which means the PUT request is not passing the object id when submitting the request.
I'm using Mongoid btw.
What am I missing here?

How to clear a new record from ember.js frontend after it fails Rails validation (422 error)?

I'm working on a basic reddit clone app with Rails and ember.js (via the ember-rails gem). Basically I have a 'post' model/controller in Rails which works correctly, but when I add a new post from the ember post model's create action, even if it fails the Rails validation, if I then go to the 'posts' index page which lists all the posts, I can see it there (i.e. ember is keeping the data). When I refresh it goes away, but I'm wondering what is the best way to purge that data so that it gets deleted upon rejection from the backend? Another odd thing is that simply going to the posts/new page at all creates a new blank post which is then visible on the Then on the client-side, I have the following files in app/assets/javascripts/routes:
posts_route.js:
RedditJp.PostsRoute = Ember.Route.extend({
model: function() {
return this.get('store').find('post');
}
});
posts_new_route.js:
RedditJp.PostsNewRoute = Ember.Route.extend({
model: function(){
return this.get('store').createRecord('post'); },
actions: {
create: function() {
var newPost = this.get('currentModel');
var self = this;
newPost.save().then(
function() { self.transitionTo('posts'); },
function() { }
);
}
}
});
Here's the form I'm trying to use to submit the data in posts/new.hbs:
<h1> Add a post </h1>
{{#each error in errors.title}}
<p>{{error.message}}</p>
{{/each}}
<form {{action "create" on="submit"}}>
<div>
<label>
Title<br/>
{{input type="text" value=title}}
</label>
</div>
<div>
<label>
Address<br/>
{{input type="text" value=address}}
</label>
</div>
<div>
<label>
Vote count<br/>
{{input type="text" value=voteCount}}
</label>
</div>
<button>Save</button>
</form>
and then in assets/javascripts/templates/posts/ I have index.hbs:
<h1>Posts</h1>
<ul>
{{#each}}
<li>{{title}} at {{address}} vote count: {{voteCount}}</li>
{{else}}
<li>There are no posts.</li>
{{/each}}
</ul>
and here's my router.js:
RedditJp.Router.map(function() {
this.resource('posts', function() {
this.route('new')
});
this.resource('home', function() {
});
});
RedditJp.IndexRoute = Ember.Route.extend({
redirect: function(){
this.transitionTo('home')
}
});
I was thinking I could just add a check in the posts/index.hbs file and only show records that aren't dirty, but there must be a cleaner way of doing it, so I'm wondering what would be considered best practice in this case (I'm thinking there should be some code I could add to the promise in posts_new_route.js to deal with this, but I can't quite figure it out).
Thanks a lot! And let me know if you need any additional info.
You can check if model isNew in template to hide new Record ( also you can use isEmpty property )
var record = store.createRecord('model');
record.get('isNew'); // true
record.save().then(function(model) {
model.get('isNew'); // false
});
In template will look like {{each model}}
{{#if model.get('isNew')}}
record.save().then(function(){
// Success callback
}, function() {
model..deleteRecord();
});

angularJS with MVC call - how to do something other than CRUD?

I've been following web tutorials to try to learn angularJS on a .NET MVC Application. All the tutorials seem to cover getting a list, getting an individual item etc.
What I want to do is allow the user to fill in an email address, I want to verify that email address against the database and return true or false if it existed. I'm then trying to put that value in the scope so I can do something in response to whether its true or false.
I'm using a single page app so this is the login html.
<form name="form" class="form-horizontal">
<div class="control-group" ng-class="{error: form.ValidEmailAddress.$invalid}">
<label class="control-label" for="ValidEmailAddress">Valid Email Address</label>
<div class="controls">
<input type="email" ng-model="item.ValidEmailAddress" id="ValidEmailAddress">
</div>
</div>
<div class="form-actions">
<button ng-click="login()" class="btn btn-primary">
Go!
</button>
<label ng-if="user.isAuthorised">Authorised</label>
<label ng-if="!user.isAuthorised">NotAuthorised</label>
</div>
</form>
In my app.js file I declare a loginCtrl controller when the url was /login so that's all fine. The logic that I'm calling on my button click is this:
var LoginCtrl = function ($scope, $location, $http, AuthorisedUser) {
$scope.login = function() {
var isValidUser = $http.get("/AuthorisedUser/IsValidUser/" + $scope.item.ValidEmailAddress);
$scope.user.isAuthorised = isValidUser;
} };
Which is then calling an MVC AuthorisedUserController class method:
public bool IsValidUser(string id)
{
var list = ((IObjectContextAdapter)db).ObjectContext.CreateObjectSet<ApprovedUser>();
var anyItems = list.Any(u => u.ValidEmailAddress == id);
return anyItems;
}
So it vaguely seemed to be working when I put in a value like "aaa" into the textbox. But as soon I try putting in an email address the value is undefined. Maybe I'm supposed to be doing a post but the only thing I can successfully hit my .NET controller with is by using get.
I'm sure I'm missing fundamental knowledge and potentially tackling this in the wrong way.
In case it helps I've created a module and defined factories like this:
var EventsCalendarApp = angular.module("EventsCalendarApp", ["ngRoute", "ngResource"]).
config(function ($routeProvider) {
$routeProvider.
when('/login', { controller: LoginCtrl, templateUrl: 'login.html', login: true }).
otherwise({ redirectTo: '/' });
});
EventsCalendarApp.factory('AuthorisedUser', function ($resource) {
return $resource('/api/AuthorisedUser/:id', { id: '#id' }, { isValidUser: { method: 'GET' } });
});
One of my questions is - should I be accessing the controller method using the $http object, or is there a way of using my factory declaration so that I can go something like:
AuthorisedUser.IsValidUser($scope.item.validEmailAddress)
I know in the tutorial I was following I could do stuff like:
CalendarEvent.save()
to be able to call a CalendarEventController post method.
What i think is, your get() function will return a promise. and you can't assign promise like this. so better try this approch once. I hope, it'd work. if not please let me know...
here I assume your first,second and third snippet of code works fine...
$http.get("/AuthorisedUser/IsValidUser/" + $scope.item.ValidEmailAddress).success(function (result, status) {
var isValidUser=result;
$scope.user.isAuthorised = isValidUser;
$scope.$apply();
}).error(function (result, status) {
//put some error msg
});

Parameter passed from view to controller not working

I have a very simple view and can't figure out why my textbox value is not passing to my controller. Will the actionlink work for providing the controller the parameter?
#{
ViewBag.Title = "Home Page";
}
#using (Html.BeginForm("LookupEmployee", "Home")) {
<div class="jumbotron">
<h2>Personnel System</h2><br />
<p>ID: <input type="text" id=employeeID name="employeeID" /></p>
#Html.ActionLink("Your Leave Balance", "LeaveBalance", "Home", null, new { #class = "btn btn-primary btn-large" })
</div>
}
<div class="row">
</div>
My HomeController takes the parameter and fills the dataset. I have hard coded a value and verified that this code works:
public class HomeController : Controller
{
public ActionResult Index()
{
return View();
}
public ActionResult LeaveBalance(string employeeID)
{
//ViewBag.Message = "Your application description page.";
if (!String.IsNullOrEmpty(employeeID))
{
DataSet gotData;
LeaveRequestWCF myDataModel = new LeaveRequestWCF();
gotData = myDataModel.GetTheData(Convert.ToInt32(employeeID));
myDataModel.theModelSet = gotData;
return View(myDataModel);
}
return View();
}
}
Any advice? As you can tell, I'm new with MVC and trying to drift away from web forms.
OPTION 1:
You are using Html.ActionLink to post a form, which cannot be done because Html.ActionLinks are rendered as Anchor tags. Anchor tags make GET Requests unless we explicitly handle their JQuery click event. Use a Submit button to post a form for an appropriate controller action. So instead of -
#Html.ActionLink("Your Leave Balance", "LeaveBalance", "Home", null,
new { #class = "btn btn-primary btn-large" })
go for -
<input type="submit" class="SomeClass" value="Submit" />
OPTION 2:
You can also use AJAX POST using JQuery click event for anchor tag to post the form and once you get the result, you can make a client side redirection.
<script src="~/Scripts/jquery-1.10.2.min.js"></script>
<script>
$(document).ready(function() {
$("#solTitle a").click(function() {
var data = {
"Id": $("#TextId").val()
};
$.ajax({
type: "POST",
url: "http://localhost:23133/api/values",
data: JSON.stringify(data),
contentType: "application/json; charset=utf-8",
dataType: "json",
processData: true,
success: function (data, status, jqXHR) {
console.log(data);
console.log(status);
console.log(jqXHR);
alert("success..." + data);
// handle redirection here
},
error: function (xhr) {
alert(xhr.responseText);
}
});
});
});
</script>
ActionLink creates a simple <a href /> on the page, that will send a get request to the server.
You need a submit button instead, so your form gets posted with its form inputs. Use:
<button type="submit">Your Leave Balance</button>

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