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TypeError: Attempted to assign to readonly property - when typing in a text field

I recently updated my Angular from 1.5.x to 1.6.4 and now, when I go to a form, I get the below error message whenever I try to type something up in the form/textbox:
TypeError: Attempted to assign to readonly property.
This is my controller:
mainApp.controller('newPostController', ['$scope', '$http', function($scope, $http){
$scope.post = '';
$scope.postCreated = false;
$scope.makeNewPost = function() {
$http.post('/api/post', {
title: $scope.post.title,
})
.then(function(res){
$scope.postCreated = true;
//extra code not related to the form itself...
};
}]);
My HTML looks like this:
<form ng-submit="makeNewPost()">
<div class="form-group">
<label for="title" class="control-label">Title</label>
<input type="text" autocomplete="off" class="form-control" ng-model="post.title" id="title" required="required">
</div>
<input type="submit" value="Submit">
</form>
I looked this error up and everything I am seeing has nothing to do with what my set up is like.
Please help me out on this. I don't know where to go from here.
Thanks

Try this...
you have initialized $scope.post = ''; as a string. But that should be $scope.post = {}; an object.
var mainApp = angular.module('app', []);
mainApp.controller('newPostController', ['$scope', '$http', function($scope, $http) {
$scope.post = {};
$scope.postCreated = false;
$scope.makeNewPost = function() {
console.log($scope.post.title);
$http.post('/api/post', {
title: $scope.post.title,
})
.then(function(res) {
$scope.postCreated = true;
//extra code not related to the form itself...
});
}
}]);
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js"></script>
<div ng-app='app' ng-controller='newPostController'>
<form ng-submit="makeNewPost()">
<div class="form-group">
<label for="title" class="control-label">Title</label>
<input type="text" autocomplete="off" class="form-control" ng-model="post.title" id="title" required="required">
</div>
<input type="submit" value="Submit">
</form>
</div>

ajax request is looping in Angularjs

Hi I am developing Angularjs application. I am making ajax call to server to get some details. Request is POST. Code written for Ajax is looping and it is not stopping.
(function () {
angular.module('RoslpApp').controller('ChangePassword', ['$scope', '$http', '$translatePartialLoader', '$translate', '$state', '$stateParams', 'cfg', 'toastr',
function ($scope, $http, $translatePartialLoader, $translate, $state, $stateParams, cfg, toastr) {
var url = cfg.Baseurl + "api/Customer/ResetPassword";
// alert(SomeFactory.getData());
var url = cfg.Baseurl + "api/Customer/ModifyPassword";
var ID = $stateParams.LoginID;
debugger;
//this loops and never stops
$scope.changePassword = function () {
var resetpassword = {
ID: ID,
NewPassword: $scope.otpnewpassword
};
$http.post(url, resetpassword).then(function (response) {
}, function (error) {
});
}
}]);
})();
This is my html code.
<div class="body-wrapper background-pattern">
<div class="form-wrapper">
<div class="form-container">
<h2 class="form-header">Change Password</h2>
<div class="form-row">
<div class="inputblock">
<span class="input-icon"><img src="images/lock-icon.png"></span>
<input type="password" class="with-icon" placeholder="New Password" ng-model="newpassword">
</div>
<div class="inputblock">
<span class="input-icon"><img src="images/lock-icon.png"></span>
<input type="password" class="with-icon" placeholder="Confirm Password">
</div>
</div>
<div class="button-container">
<input type="button" value="Change Password" id="input-submit" ng-bind="changePassword()">
<input type="submit" value="Cancel" id="input-cancel">
</div>
</div>
</div>
</div>
I am not sure why Ajax call is looping. May I get some help here to fix this? Any help would be appreciated. Thank you.

You are using ng-bind with a function, ngBind attribute tells AngularJS to replace the text content of the specified HTML element Try ng-click instead of that.
<input type="button" value="Change Password" id="input-submit" ng-bind="changePassword()">
to
<input type="button" value="Change Password" id="input-submit" ng-click="changePassword()">

Update page after form submit - using Angular

I am using the MEAN framework - I have a basic form (as per below) that when data is entered it is sent to a rest API which then has a function that uses Mongoose to save data. That is all good... however i'm stuck on something more basic!
After a user has submitted this form it lands on a blank page with the api/img/add, how do i go back to my original page? I tried adding ng-submit="fetchImages()" within the form tag and then implementing a function in a script (also shown below) but for some reason this was not working, am i missing the point and doing something really wrong?
Thanks in advance
<form action="api/img/add" method="post" enctype="multipart/form-data">
<div>
<label for="image">Select an image</label>
<input type="file" name="image" id="image">
</div>
<div>
<label for="title">Title</label>
<input type="text" name="title" id="title">
</div>
<input type="submit">
</form>
< script >
angular.module('app', []).controller('main', ['$scope', '$http',
function($scope, $http) {
$scope.images = [];
$scope.fetchImages = function() {
$scope.images = [];
$http.get('api/img').then(function(res) {
$scope.images = JSON.parse(res.data);
}, function(res) {
console.log(res.statusText);
});
}
$scope.fetchImages();
}
]); < /script>

If you literally want to go back to the last page, you could use:
$window.history.back();
In your example, I would create the function in the controller as outlined below, and change
<input type="submit">
to
<input type="submit" ng-click="goHome()">
I created an über-simple plunk here with a button that will take you back:
https://plnkr.co/edit/wzMlPF9kOmrGg01mOnBB?p=preview
JS
app.controller('ctrl',function($scope,$window){
$scope.goHome = function() {
$window.history.back();
}
});
HTML
<button ng-click="goHome()">Go Home</button>

Try this:
In html
<form ng-submit="submitData()">
<div>
<label for="image">Select an image</label>
<input type="file" ng-model="formdata.image" id="image">
</div>
<div>
<label for="title">Title</label>
<input type="text" ng-model="formdata.title" id="title">
</div>
<input type="submit">
</form>
In your controller:
angular.module('app', []).controller('main', ['$scope', '$http',
function($scope, $http) {
$scope.formdata = {};
$scope.images = [];
$scope.fetchImages = function() {
$scope.images = [];
$http.get('api/img').then(function(res) {
$scope.images = JSON.parse(res.data);
}, function(res) {
console.log(res.statusText);
});
}
$scope.fetchImages();
//this function will post data to your api without refreshing the page
$scope.submitData = function(){
$http.post('api-comes-here', $scope.formdata).then(function(res) {
//handle success
}, function(error) {
//handle error
});
}
}

angularjs JavaScript inheritance, fail to bind data from view to a controller

what am trying to do is to get data from the form use it in my controller in HTTP post call but it's not working
I know i might have problem with inheritance of scopes but icant solve it.
here is my controller code:
.controller('SignUpCtrl', function($scope, $http, $state) {
$scope.submit = function() {
var url = 'http://localhost:3000/register';
var user = {
email: $scope.email,
password: $scope.password,
};
console.log($scope.user);
$http.post(url, user)
.success(function(res){
console.log('You are now Registered');
//$state.go('app.items');
})
.error(function(err){
console.log('Could not register');
// $state.go('error');
});
};
})
Here is the code of my Template:
<form name="register">
<div class="list">
<label class="item item-input no-border">
<input name="fullname" type="text" ng-model="fullname" placeholder="Full Name" required="">
</label>
<label class="item item-input">
<input name="email" type="email" ng-model="user.email" placeholder="Email" required="">
</label>
<p class="blue-font" ng-show="register.email.$dirty && register.email.$invalid">Please Write valid Email.</p>
<label class="item item-input">
<input name="password" type="password" ng-model="user.password" placeholder="Password" required="">
</label>
<button ng-click="submit();" ng-disabled="register.$invalid" type="submit" class="button signup-btn sharb-border white-font blue-bg-alt border-blue-alt ">
Sign Up
</button>
</div>
</form>
Note: i tried the ng-submit its not really the problem

Inside the controller.
.controller('SignUpCtrl', function($scope, $http, $state) {
$scope.user = {
email: '',
password: ''
};
$scope.submit = function() {
And this
var user = {
email: $scope.user.email,
password: $scope.user.password
};
Also drop the ; in ng-click
<button ng-click="submit()" ...>

Try to use rootScope (docs.angularjs.org/$rootScope").

AngularJs + php authentication

Hi i started learning AngularJs and now im trying to do my Login module using angular and php, but i have some issues. I have watched alot tutorials but none of them was helpful in my case, so here is what i have: controllers.js:
var controllers = angular.module('controllers', []);
controllers.controller('loginController', ['$scope', '$http', 'UserService', function(scope, $http, User) {
scope.main = [
{username: '', password: ''}
]
scope.login = function(){
var config = {
url: '../auth/login.php',
method: 'POST',
data: {
username: scope.main.username,
password: scope.main.password
},
headers: {'Content-Type': 'application/x-www-form-urlencoded'}
}
$http(config)
.success(function(data,status,headers,config){
if(data.status){
//succefull login
User.isLogged = true;
User.username = data.username;
}
else{
User.isLogged = false;
User.username = '';
}
})
.error(function(data,status,headers,config){
User.isLogged = false;
User.username = '';
});
}
}])
auth.js:
var services = angular.module('services', []);
services.factory('UserService', [function(){
var sdo = {
isLogged: false,
username: ''
};
return sdo;
}]);
login.php:
$username = $_POST['username'];
if($username){
return "Logged";
}else{
return false;
}
and the html:
<div class="col-xs-12" id="loginCol" ng-controller="loginController">
<form ng-submit='login()' name="form" novalidate>
<div class="form-group">
<label for="username" class="sr-only">Username</label>
<input type="text" ng-model="scope.main.username" class="form-control" id="username" placeholder="Име..." />
<label for="password" class="sr-only">Password</label>
<input type="password" ng-model="scope.main.password" class="form-control" id="password" placeholder="Парола..." />
</div>
<div class="form-group pull-right">
<button type="button" class="btn btn-primary">Login</button>
<button type="button" class="btn btn-default">Register</button>
</div>
</form>
</div>
In this case i want just if user type something in the username input and hit the login button and on successful call of login.php to return some message. The problem is that code written like that got error "'loginController' is not a function, got undefined" how to fix it?

(Disclosure: I'm one of the developers of UserApp)
You could try the third-party service UserApp, together with the AngularJS module.
Check out the getting started guide, or take the course on Codecademy. Here's some examples of how it works:
Login form with error handling:
<form ua-login ua-error="error-msg">
<input name="login" placeholder="Username"><br>
<input name="password" placeholder="Password" type="password"><br>
<button type="submit">Log in</button>
<p id="error-msg"></p>
</form>
Signup form with error handling:
<form ua-signup ua-error="error-msg">
<input name="first_name" placeholder="Your name"><br>
<input name="login" ua-is-email placeholder="Email"><br>
<input name="password" placeholder="Password" type="password"><br>
<button type="submit">Create account</button>
<p id="error-msg"></p>
</form>
ua-is-email means that the username is the same as the email.
How to specify which routes that should be public, and which route that is the login form:
$routeProvider.when('/login', {templateUrl: 'partials/login.html', public: true, login: true});
$routeProvider.when('/signup', {templateUrl: 'partials/signup.html', public: true});
The .otherwise() route should be set to where you want your users to be redirected after login. Example:
$routeProvider.otherwise({redirectTo: '/home'});
Log out link:
<a href="#" ua-logout>Log Out</a>
Access user properties:
User info is accessed using the user service, e.g: user.current.email
Or in the template: <span>{{ user.email }}</span>
Hide elements that should only be visible when logged in:
<div ng-show="user.authorized">Welcome {{ user.first_name }}!</div>
Show an element based on permissions:
<div ua-has-permission="admin">You are an admin</div>
And to authenticate to your back-end services, just use user.token() to get the session token and send it with the AJAX request. At the back-end, use the UserApp API with the PHP library to check if the token is valid or not.
If you need any help, just let me know :)

You have created the application
var controllers = angular.module('controllers', []);
but didn't use it in the html code, add ng-app attribute to the wrapper div
<div class="col-xs-12" ng-app="controllers" id="loginCol" ng-controller="loginController">
the second issue, that you try to catch submit event, but don't submit the form, use submit type instead button
<button type="submit" class="btn btn-primary">Login</button>
or add ng-click="login()" attribute to the button and remove ng-submit='login()' from the form