Laravel Eloquent Relationships test

app/Http/Controllers/CountryController.php

@@ -9,7 +9,7 @@ class CountryController extends Controller
     public function index()
     {
         // TASK: load the relationship average of team size
-        $countries = Country::all();
+        $countries = Country::withAvg('teams','size')->get();
 
         return view('countries.index', compact('countries'));
     }

app/Http/Controllers/ProjectController.php

@@ -10,7 +10,7 @@ public function store(Request $request)
     {
         // TASK: Add one sentence to save the project to the logged-in user
         //   by $request->project_id and with $request->start_date parameter
-
+        $request->user()->projects()->attach($request->project_id,['start_date'=>$request->start_date]);
         return 'Success';
     }
 }

app/Http/Controllers/TeamController.php

@@ -8,7 +8,7 @@ class TeamController extends Controller
 {
     public function index()
     {
-        $teams = Team::with('users')->get();
+        $teams = Team::with('users','name','email')->get();
 
         return view('teams.index', compact('teams'));
     }

app/Http/Controllers/UserController.php

@@ -8,8 +8,7 @@ class UserController extends Controller
 {
     public function index()
     {
-        $users = User::all();
-
+        $users = User::has('projects')->get();
         return view('users.index', compact('users'));
     }
 

app/Models/Attachment.php

@@ -4,15 +4,17 @@
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\MorphTo;
 
 class Attachment extends Model
 {
     use HasFactory;
 
     protected $fillable = ['filename', 'attachable_id', 'attachable_type'];
 
-    public function attachable()
+    public function attachable(): MorphTo
     {
         // TASK: fill in the code to make it work
+        return $this->morphTo(__FUNCTION__, 'attachable_type', 'attachable_id');
     }
 }

app/Models/Role.php

@@ -4,16 +4,17 @@
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 
 class Role extends Model
 {
     use HasFactory;
 
     protected $fillable = ['name'];
 
-    public function users()
+    public function users(): BelongsToMany
     {
         // TASK: fix this by adding a parameter
-        return $this->belongsToMany(User::class);
+        return $this->belongsToMany(User::class, 'users_roles', 'role_id', 'user_id');
     }
 }

app/Models/Task.php

@@ -13,6 +13,6 @@ class Task extends Model
 
     public function user()
     {
-        return $this->belongsTo(User::class, 'users_id');
+        return $this->belongsTo(User::class, 'users_id')->withDefault();
     }
 }

app/Models/User.php

@@ -7,6 +7,7 @@
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Illuminate\Notifications\Notifiable;
 use Laravel\Sanctum\HasApiTokens;
+use Illuminate\Database\Eloquent\Relations\HasMany;
 
 class User extends Authenticatable
 {
@@ -42,15 +43,16 @@ class User extends Authenticatable
         'email_verified_at' => 'datetime',
     ];
 
-    public function tasks()
+    public function tasks(): HasMany
     {
         // TASK: fix this by adding a parameter
-        return $this->hasMany(Task::class);
+        return $this->hasMany(Task::class, 'users_id');
     }
 
     public function comments()
     {
         // TASK: add the code here for two-level relationship
+        return $this->hasMany(Comment::class,'id');
     }
 
     public function projects()