Unable to access the value of an undefined property

In my HTML view, I have the following code:

<form name="adduser" id="signupForm" novalidate>
    <span>First Name</span>
    <label class="item item-input" id="profileLabel">
    <input id="profileInput" type="text"
                     ng-model="user.fname"
                     class="form-control"                              
                     placeholder="{{fnamePlaceholder}}"
                     ng-minlength="1" >
    </label>

    <div id="name-group" class="form-group-lg">
         <button type="submit" ng-click="updateData(user)" id="initiateSignUp" class=" button button-positive  button-block" >
         Save and continue
         </button>
    </div>
</form>

Below is the starting point of my controller:

$scope.updateData=function(user){
    console.log (user.fname)
}

However, I am encountering the following error message:

TypeError: Cannot read property 'fname' of undefined

Answer №1

To start off, make sure to initialize $scope.currentUser = {}; within the controller.

There is no need to include currentUser as an argument in your ngClick function. Since the currentUser variable is already set on the scope, passing it as a parameter is unnecessary.

Simply refer to $scope.currentUser directly in your callback.

Answer №2

Attempting to assign a property to an object that currently has no value

Prior to setting properties, it is important to first initialize the user object.

$scope.user = {};

Answer №3

Even though Angular has the ability to automatically generate primitive values in your controller, it is unable to do the same for complex types such as objects or arrays. Therefore, you must manually initialize these components within the controller before attempting to utilize them in bindings.

Answer №4

Start by defining the user as an object.

$scope.user = {};

$scope.updateData = function(user) {
  console.log (user.firstname);
};

If the user is not defined before being used, the compiler will be unable to create a property for it since it is expected to be an object.

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