Laravel 8: Undefined index

Question

I'm working on a questionnaire project and I ran into an error saying:

Undefined index: exams

This happened when I was trying to store responses to my database.

Here is my controller code:

    public function store(Math $math)
    {
        $data = request()->validate([
            'responses.*.answer_id' => 'required',
            'responses.*.question_id' => 'required'
        ]);

        $exam = $math->exams()->create($data['exams']);
        $exam->examanswers()->createMany($data['examanswers']);

        return 'Thank You';
    }

Here is my exam model:

{
    use HasFactory;
    protected $fillable = ['exam'];

    public function math()
    {
        return $this->belongsTo(Math::class);
    }

    public function examanswers()
    {
        return $this->hasMany(ExamAnswer::class);
    }
}

question model:

{
    use HasFactory;
    protected $fillable = ['question'];

    public function math()
    {
        return $this->belongsTo(Math::class);
    }

    public function answers()
    {
        return $this->hasMany(Answer::class);
    }
}

Math model:

{
    use HasFactory;
    protected $fillable = [
        'user_id', 'title', 'purpose', 'exam'
    ];

    public function user()
    {
        return $this->belongsTo(User::class);
    }

    public function questions()
    {
        return $this->hasMany(Question::class);
    }

    public function exams()
    {
        return $this->hasMany(Exam::class);
    }
}

Please help me look into it.

Just see on your validation rules.. i did not see “exams” there. — Maksim, Jul 31 '21 at 01:05
@Maksim I was actually following my tutor, it's the project after course and there was no validation for exams but trying it now removed the error — Iam-kelvin, Jul 31 '21 at 02:08
@AlbertoSinigaglia : It exist because I'm trying to save users responses — Iam-kelvin, Jul 31 '21 at 02:11

matiaslauriti · Answer 1 · 2022-02-11T17:52:20.133

request()->validate(RULES) will return an array with all the existing rules' indexes. It will not return all data present, just what it is in the rules and present.

Read how $request->validate() works.

For example:

If you send home = 'Address', name = 'John' and email = 123, but your rules are:

$data = $request->validate([
    'home' => 'required',
    'name' => 'required',
]);

Then, if you want to use $data you would have (dd($data)):

$data['home']: Address
$data['name']: John

But email = 123 would not be present in $data.

Laravel 8: Undefined index

1 Answers1