Laravel - Validation - Quick Writing The Validation Logic
Now we are ready to fill in our store
method with the logic to validate the new blog post. To do this, we will use the validate
method provided by the Illuminate\Http\Request
object. If the validation rules pass, your code will keep executing normally; however, if validation fails, an Illuminate\Validation\ValidationException
exception will be thrown and the proper error response will automatically be sent back to the user.
If validation fails during a traditional HTTP request, a redirect response to the previous URL will be generated. If the incoming request is an XHR request, a JSON response containing the validation error messages will be returned.
To get a better understanding of the validate
method, let's jump back into the store
method:
/**
* Store a new blog post.
*
* @param \Illuminate\Http\Request $request
* @return \Illuminate\Http\Response
*/
public function store(Request $request)
{
$validated = $request->validate([
'title' => 'required|unique:posts|max:255',
'body' => 'required',
]);
// The blog post is valid...
}
As you can see, the validation rules are passed into the validate
method. Don't worry - all available validation rules are documented. Again, if the validation fails, the proper response will automatically be generated. If the validation passes, our controller will continue executing normally.
Alternatively, validation rules may be specified as arrays of rules instead of a single |
delimited string:
$validatedData = $request->validate([
'title' => ['required', 'unique:posts', 'max:255'],
'body' => ['required'],
]);
In addition, you may use the validateWithBag
method to validate a request and store any error messages within a named error bag:
$validatedData = $request->validateWithBag('post', [
'title' => ['required', 'unique:posts', 'max:255'],
'body' => ['required'],
]);