Error while trying to Insert into database with Laravel

Question

I’m using the Laravel and I’ve been racking my brain trying to figure out the cause of the following mistake while trying to make a insert:

(1/1) Errorexception Illegal offset type

in Hasattributes.php (line 818)

Handleexceptions->handleError(2, 'Illegal offset type', 'C: nisfram vendor Laravel framework src Illuminate Database Eloquent Concerns Hasattributes.php', 818, array()) in Hasattributes.php (line 818)

At model->getCasts() in Hasattributes.php (line 803)

At model->hasCast('ST_ALUNO_ALU', array('date', 'datetime')) in Hasattributes.php (line 832)

At model->isDateCastable('ST_ALUNO_ALU') in Hasattributes.php (line 565)

At model->isDateAttribute('ST_ALUNO_ALU') in Hasattributes.php (line 525)

At model->setAttribute('ST_ALUNO_ALU', 'Matheus') in Model.php (line 233)

And the error messages go further still.

My table is as follows:

Schema::create('alunos', function (Blueprint $table) {
        $table->increments('ID_ALUNO_ALU');
        $table->string('ST_ALUNO_ALU', 100);
        $table->string('ST_RESPONSAVEL_ALU', 100);
        $table->integer('NM_MATRICULA_ALU');
        $table->date('DT_NASCIMENTO_ALU')->nullable();
        $table->timestamps();
    });

My form is as follows:

<form class="form" action="{{ route('alunos.store') }}" method="POST">

   <input name="_token" type="hidden" value="{{ csrf_token() }}"/>

    <div class="row">
        <div class="col-md-12">
            <label for="ST_ALUNO_ALU" class="control-label">Nome</label>
            <input type="text" class="form-control" name="ST_ALUNO_ALU" value="" autofocus>
    </div>
</div>

<div class="row">
    <div class="col-md-12">
        <label for="ST_RESPONSAVEL_ALU" class="control-label">Responsável</label>
        <input type="text" class="form-control" name="ST_RESPONSAVEL_ALU" value="">
    </div>
</div>

<div class="row">
    <div class="col-md-4">
        <label for="NM_MATRICULA_ALU" class="control-label">NIS</label>
        <input type="number" class="form-control" name="NM_MATRICULA_ALU" value="">
    </div>
    <div class="col-md-4">
        <label for="DT_NASCIMENTO_ALU" class="control-label">Data de Nascimento</label>
        <input type="date" class="form-control" name="DT_NASCIMENTO_ALU" value="">
    </div>
</div>

And my controller method:

public function store(Request $request)
{
    $save = Aluno::create($request->all());

    if($save)
        redirect()->back();
    else
        throw new Exception("Não foi possível registrar o aluno");            
}

If anyone can help me, thank you, because I have no idea where the mistake is.

Answer 1

I found the error. In my model the primary key was like this:

protected $primaryKey = ['ID_ALUNO_ALU'];

Just remove the array brackets that worked.