How to display en error message when validation fails in PHP Laravel

Question

I'm stuck in displaying a message in form validation.

Here is my code:

class InputController extends Controller
{
    public static function save(Request $request)
    {
        //Get input values to variables respectively
        $First_Name = $request->input('First_Name');
        $Last_Name = $request->input('Last_Name');
        $Email = $request->input('Email');
        $Credit_Card = $request->input('Credit_Card');
        $Password = $request->input('Password');

        //Rules for each field
        $rules = [
            'First_Name' => ['required', 'string'],
            'Last_Name' => ['required', 'string'],
            'Email' => ['required', 'string'],
            'Credit_Card' => ['required', 'string'],
            'Password' => ['required', 'string']
        ];

        //Validator variable
        $valid = Validator::make($request->all(),$rules);

        //Insert information into SQL table
        $customer = new CustomersTable;
        $customer->First_Name = $First_Name;
        $customer->Last_Name = $Last_Name;
        $customer->Email = $Email;
        $customer->Credit_Card = $Credit_Card;
        $customer->Password = Hash::make($Password);

        $customer->save();

        //If validation fails, pop out a message or else view localhost/submit
        if ($valid -> failed())
        {
            dd("Error! Some of the required information are empty");
        }
        else
        {
            return view('submit');
        }
    }
}

In the below:

if ($valid -> failed())
{
    dd("Error! Some of the required information are empty");
}
else
{
    return view('submit');
}

,when I let every field (First_Name, Last_Name,...) in the form empty and click the button to post, the validation should be fail and the page should display

"Error! Some of the required information are empty"

But instead, it pops out the error of SQL:

SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'First_Name' cannot be null

, which means it jumped into "else" statement. Can anyone explain it for me?

Would the documentation on Displaying The Validation Errors help? — user8034901
– user8034901, Commented Aug 22, 2021 at 10:23

Hanan Alhasan · Accepted Answer · 2021-08-22 10:34:15Z

you have to put this code before you insert the data

if ($valid -> failed())
{
    dd("Error! Some of the required information are empty");
}

your code should be

//Validator variable
    $valid = Validator::make($request->all(),$rules);
    if ($valid -> failed())
    {
        dd("Error! Some of the required information are empty");
    }
    else
    {
        //Get input values to variables respectively
        $First_Name = $request->input('First_Name');
        $Last_Name = $request->input('Last_Name');
        $Email = $request->input('Email');
        $Credit_Card = $request->input('Credit_Card');
        $Password = $request->input('Password');

        //Insert information into SQL table
        $customer = new CustomersTable;
        $customer->First_Name = $First_Name;
        $customer->Last_Name = $Last_Name;
        $customer->Email = $Email;
        $customer->Credit_Card = $Credit_Card;
        $customer->Password = Hash::make($Password);

        $customer->save();
        return view('submit');
   }

Behzad · Accepted Answer · 2021-08-22 10:29:40Z

0

I think this is because of you are assigning request values to variables before validation. Try this:


class InputController extends Controller
{
    public static function save(Request $request)
    {
       
        $request->validate([
            'First_Name' => ['required', 'string'],
            'Last_Name' => ['required', 'string'],
            'Email' => ['required', 'string'],
            'Credit_Card' => ['required', 'string'],
            'Password' => ['required', 'string']
        ]);


        //Get input values to variables respectively
        $First_Name = $request->input('First_Name');
        $Last_Name = $request->input('Last_Name');
        $Email = $request->input('Email');
        $Credit_Card = $request->input('Credit_Card');
        $Password = $request->input('Password');

        //Insert information into SQL table
        $customer = new CustomersTable;
        $customer->First_Name = $First_Name;
        $customer->Last_Name = $Last_Name;
        $customer->Email = $Email;
        $customer->Credit_Card = $Credit_Card;
        $customer->Password = Hash::make($Password);

        $customer->save();

        //If validation fails, pop out a message or else view localhost/submit
        if ($valid -> failed())
        {
            dd("Error! Some of the required information are empty");
        }
        else
        {
            return view('submit');
        }
    }
}

answered Aug 22, 2021 at 10:29

Behzad

5826 silver badges19 bronze badges

2 Comments

Behzad Over a year ago

if you wanna show the error messages in form you can do this by blade @error component, so if validation fails user redirects to submit view with errors shown.

Hacker Rhino Over a year ago

I thought there is a 'require' property in $rules so when letting all fields empty, the validation should always fail?

sajjad · Accepted Answer · 2021-08-22 11:27:04Z

0

if ($valid->fails())
{
   return redirect()->back()->withErrors($valid)->withInput();
}

and in blade template show errors with below code

@if ($errors->has('First_Name'))
    <span class="invalid-feedback">
        <strong>{{ $errors->first('First_Name') }}</strong>
    </span>
@endif

answered Aug 22, 2021 at 11:27

sajjad

4875 silver badges14 bronze badges

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