Gestions Projet: Models

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Developpeur extends Model
{
    protected $table = "developpeurs";
    protected $primaryKey = "idDev";
    protected $fillable = ["nomDev", "prenomDev", "cv", "photoDev"];

    public function Tache(){
        return $this->hasMany(Tache::class, "idDev", "idDev");
    }
}

<?php

namespace App\Models;


use Illuminate\Database\Eloquent\Model;

class Projet extends Model
{
    protected $table = "projets";
    protected $primaryKey = "idP";
    protected $fillable = ["nomP", "description", "photoP"];

    public function Tache(){
        return $this->hasMany(Tache::class, "idP", "idP");
    }
}

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Tache extends Model
{
    protected $table = "taches";
    protected $primaryKey = "idT";
    protected $fillable = ["idP", "idDev", "duree", "coutHeure", "etat"];

    public function Projet()
    {
        return $this->belongsTo(Projet::class, "idP", "idP");
    }

    public function Developpeur()
    {
        return $this->belongsTo(Developpeur::class, "idDev", "idDev");
    }
}