Add HasManyThrough example

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>

Author: crynobone

app/Http/Resources/PostResource.php

@@ -6,6 +6,16 @@
 
 class PostResource extends JsonApiResource
 {
+    /**
+     * The resource's relationships.
+     * 
+     * @var list<string>
+     */
+    protected array $relationships = [
+        'comments',
+        'user',
+    ];
+
     /**
      * The resource's attributes.
      *

app/Http/Resources/UserResource.php

@@ -13,8 +13,10 @@ class UserResource extends JsonApiResource
     public function toRelationships(Request $request)
     {
         return [
+            'comments',
             'posts',
             'profile',
+            'reactions',
             'teams',
         ];
     }

app/Models/Comment.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class Comment extends Model
+{
+    /** @use HasFactory<\Database\Factories\CommentFactory> */
+    use HasFactory;
+
+    /**
+     * Get the post that owns the comment.
+     */
+    public function post(): BelongsTo
+    {
+        return $this->belongsTo(Post::class);
+    }
+
+    /**
+     * Get the user that owns the comment.
+     */
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+}

app/Models/Post.php

@@ -4,9 +4,27 @@
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
 
 class Post extends Model
 {
     /** @use HasFactory<\Database\Factories\PostFactory> */
     use HasFactory;
+
+    /**
+     * Get the comments for the post.
+     */
+    public function comments(): HasMany
+    {
+        return $this->hasMany(Comment::class);
+    }
+
+    /**
+     * Get the user that owns the post.
+     */
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
 }

app/Models/User.php

@@ -4,6 +4,8 @@
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\Relations\HasManyThrough;
 use Illuminate\Database\Eloquent\Relations\HasOne;
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Illuminate\Notifications\Notifiable;
@@ -72,4 +74,28 @@ public function teams(): BelongsToMany
             ->using(Membership::class)
             ->as('membership');
     }
+
+    /**
+     * Get the posts for the user.
+     */
+    public function posts(): HasMany
+    {
+        return $this->hasMany(Post::class);
+    }
+
+    /**
+     * Get the comments for the user.
+     */
+    public function comments(): HasMany
+    {
+        return $this->hasMany(Comment::class);
+    }
+
+    /**
+     * Get all of the reactions for the user.
+     */
+    public function reactions(): HasManyThrough
+    {
+        return $this->hasManyThrough(Comment::class, Post::class);
+    }
 }

composer.lock

@@ -0,0 +1,26 @@
+<?php
+
+namespace Database\Factories;
+
+use App\Models\Post;
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+/**
+ * @extends \Illuminate\Database\Eloquent\Factories\Factory<\App\Models\Comment>
+ */
+class CommentFactory extends Factory
+{
+    /**
+     * Define the model's default state.
+     *
+     * @return array<string, mixed>
+     */
+    public function definition(): array
+    {
+        return [
+            'post_id' => PostFactory::new(),
+            'user_id' => UserFactory::new(),
+            'content' => $this->faker->words(10, true),
+        ];
+    }
+}

database/factories/CommentFactory.php

@@ -0,0 +1,30 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('comments', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('post_id')->unique();
+            $table->foreignId('user_id')->index()->nullable();
+            $table->text('content');
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('comments');
+    }
+};

database/migrations/2025_11_07_124647_create_comments_table.php

@@ -3,6 +3,7 @@
 namespace Database\Seeders;
 
 use App\Enums\TeamRole;
+use App\Models\Comment;
 use App\Models\Post;
 use App\Models\Team;
 use App\Models\User;
@@ -35,6 +36,15 @@ public function run(): void
         $user->teams()->attach($team, ['role' => TeamRole::MEMBER]);
 
         User::factory(10)->create();
-        Post::factory(50)->create();
+        $posts = Post::factory(50)->create();
+
+        tap($posts->first(), function (Post $post) use ($user) {
+            $post->user_id = $user->getKey();
+        })->save();
+
+        Comment::factory()->create([
+            'post_id' => $posts->first()->getKey(),
+            'user_id' => $user->getKey(),
+        ]);
     }
 }

database/seeders/DatabaseSeeder.php

@@ -6,14 +6,14 @@
 use App\Models\UserProfile;
 use Illuminate\Support\Facades\Route;
 
-Route::get('users', fn () => User::paginate(10)->toResourceCollection());
+Route::get('users', fn () => User::paginate(50)->toResourceCollection());
 Route::get('users/{user}', fn (User $user) => $user->toResource());
 
-Route::get('user-profiles', fn () => UserProfile::paginate(10)->toResourceCollection());
+Route::get('user-profiles', fn () => UserProfile::paginate(50)->toResourceCollection());
 Route::get('user-profiles/{userProfile}', fn (UserProfile $userProfile) => $userProfile->toResource());
 
-Route::get('posts', fn () => Post::paginate(10)->toResourceCollection());
+Route::get('posts', fn () => Post::paginate(50)->toResourceCollection());
 Route::get('posts/{post}', fn (Post $post) => $post->toResource());
 
-Route::get('teams', fn () => Team::paginate(10)->toResourceCollection());
+Route::get('teams', fn () => Team::paginate(50)->toResourceCollection());
 Route::get('teams/{team}', fn (Team $team) => $team->toResource());