ldc-dam/app/Models/Variante.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Variante extends Model
{
    /**
     * The primary key associated with the table.
     *
     * @var string
     */
    protected $primaryKey = 'codeVariante';

    // * RELATIONSHIPS

    /**
     * BelongsTo sujet relation
     *
     * Get the sujet that owns the variante.
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function sujet()
    {
        return $this->belongsTo(Sujet::class);
    }

    /**
     * BelongsTo typeVue relation
     *
     * Get the typeVue that owns the variante.
     *
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function typeVue()
    {
        return $this->belongsTo(TypeVue::class);
    }
}