@ngdoc error
@name ngModel:nonassign
@fullName Non-Assignable Expression
@description

This error occurs when expression the {@link ng.directive:ngModel ngModel} directive is bound to is a non-assignable expression.

Examples using assignable expressions include:

```
<input ng-model="namedVariable">
<input ng-model="myObj.someProperty">
<input ng-model="indexedArray[0]">
```

Examples of non-assignable expressions include:

```
<input ng-model="foo + bar">
<input ng-model="42">
<input ng-model="'oops'">
<input ng-model="myFunc()">
```

Always make sure that the expression bound via `ngModel` directive can be assigned to.

For more information, see the {@link ng.directive:ngModel ngModel API doc}.