Feature - Solve Exercises 1 and 2

app/Console/Commands/MigrateAttachmentsData.php

@@ -0,0 +1,91 @@
+<?php
+
+namespace App\Console\Commands;
+
+use App\Models\Attachment;
+use App\Models\Comment;
+use App\Models\CommentAttachment;
+use App\Models\Post;
+use App\Models\PostAttachment;
+use Illuminate\Console\Command;
+use Illuminate\Database\Eloquent\Model;
+
+class MigrateAttachmentsData extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'migrate_attachments_data';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = 'Migration of the data from the post_attachments and comment_attachments tables to attachments table';
+
+    /**
+     * The attachment data array.
+     *
+     * @var array
+     */
+    protected $attachmentArray = [];
+
+    /**
+     * Create a new command instance.
+     *
+     * @return void
+     */
+    public function __construct()
+    {
+        parent::__construct();
+    }
+
+    /**
+     * Execute the console command.
+     */
+    public function handle()
+    {
+        $this->line('Migrating...');
+        $this->newLine();
+
+        PostAttachment::all()->each(function ($postAttachment) {
+            $this->setAttachmentArray($postAttachment);
+        });
+
+        CommentAttachment::all()->each(function ($commentAttachment) {
+            $this->setAttachmentArray($commentAttachment);
+        });
+
+        $this->withProgressBar(collect($this->attachmentArray)->chunk(100)->toArray(), function ($attachmentArray) {
+            Attachment::insert($attachmentArray);
+        });
+
+        $this->newLine();
+        $this->newLine();
+        $this->info('Done!');
+    }
+
+    /**
+     * Set attachmentArray.
+     *
+     * @param Illuminate\Database\Eloquent\Model $model
+     *
+     * @return void
+     */
+    protected function setAttachmentArray(Model $model)
+    {
+        $attachable_type = (get_class($model) == PostAttachment::class) ? Post::class : Comment::class;
+        $attachable_id = ($attachable_type == Post::class) ? $model->post_id : $model->comment_id;
+
+        $this->attachmentArray[] = [
+            'attachable_type' => $attachable_type,
+            'attachable_id' => $attachable_id,
+            'url' => $model->url,
+            'updated_at' => $model->updated_at,
+            'created_at' => $model->created_at,
+        ];
+    }
+}

app/Console/Kernel.php

@@ -2,6 +2,7 @@
 
 namespace App\Console;
 
+use App\Console\Commands\MigrateAttachmentsData;
 use Illuminate\Console\Scheduling\Schedule;
 use Illuminate\Foundation\Console\Kernel as ConsoleKernel;
 
@@ -13,13 +14,12 @@ class Kernel extends ConsoleKernel
      * @var array
      */
     protected $commands = [
-        //
+        MigrateAttachmentsData::class,
     ];
 
     /**
      * Define the application's command schedule.
      *
-     * @param  \Illuminate\Console\Scheduling\Schedule  $schedule
      * @return void
      */
     protected function schedule(Schedule $schedule)

app/Http/Controllers/HomeController.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\User;
+
+class HomeController extends Controller
+{
+    /**
+     * Display a listing of users, posts, comments and attachments.
+     *
+     * @return \Illuminate\View\View
+     */
+    public function index()
+    {
+        $users = User::with([
+            'posts' => function ($post) {
+                $post->withCount('attachments');
+                $post->withCount('comments');
+                $post->withCount('commentAttachments');
+            },
+        ])->get();
+
+        return view('index', compact('users'));
+    }
+}

app/Models/Attachment.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class Attachment extends Model
+{
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var string[]
+     */
+    protected $fillable = [
+        'attachable_type',
+        'attachable_id',
+        'url',
+    ];
+
+    /**
+     * Get the parent attachable model.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\MorphTo
+     */
+    public function attachable()
+    {
+        return $this->morphTo();
+    }
+}

app/Models/Comment.php

@@ -16,16 +16,36 @@ class Comment extends Model
      */
     protected $fillable = [
         'body',
-        'post_id'
+        'post_id',
     ];
 
+    /**
+     * A comment belongs to a post.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
     public function post()
     {
         return $this->belongsTo(Post::class);
     }
 
+    /**
+     * A comment may have many comment attachments.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
     public function comment_attachments()
     {
         return $this->hasMany(CommentAttachment::class);
     }
+
+    /**
+     * Get all of the comment's attachments..
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\MorphMany
+     */
+    public function attachments()
+    {
+        return $this->morphMany(Attachment::class, 'attachable');
+    }
 }

app/Models/Post.php

@@ -17,21 +17,56 @@ class Post extends Model
     protected $fillable = [
         'title',
         'body',
-        'user_id'
+        'user_id',
     ];
 
+    /**
+     * A post belongs to a user.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
     public function user()
     {
         return $this->belongsTo(User::class);
     }
 
+    /**
+     * A post may have many comments.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
     public function comments()
     {
         return $this->hasMany(Comment::class);
     }
 
+    /**
+     * A post may have many post attachments.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
     public function post_attachments()
     {
         return $this->hasMany(PostAttachment::class);
     }
+
+    /**
+     * Get all of the post's attachments.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\MorphMany
+     */
+    public function attachments()
+    {
+        return $this->morphMany(Attachment::class, 'attachable');
+    }
+
+    /*
+     * Get all of comment attachments for the post.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasManyThrough
+     */
+    public function commentAttachments()
+    {
+        return $this->hasManyThrough(Attachment::class, Comment::class, 'post_id', 'attachable_id')->where('attachable_type', Comment::class);
+    }
 }

app/Models/User.php

@@ -2,15 +2,16 @@
 
 namespace App\Models;
 
-use Illuminate\Contracts\Auth\MustVerifyEmail;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Illuminate\Notifications\Notifiable;
 use Laravel\Sanctum\HasApiTokens;
 
 class User extends Authenticatable
 {
-    use HasApiTokens, HasFactory, Notifiable;
+    use HasApiTokens;
+    use HasFactory;
+    use Notifiable;
 
     /**
      * The attributes that are mass assignable.
@@ -42,6 +43,11 @@ class User extends Authenticatable
         'email_verified_at' => 'datetime',
     ];
 
+    /**
+     * A user may have many posts.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
     public function posts()
     {
         return $this->hasMany(Post::class);

database/migrations/2022_02_02_154220_create_attachments_table.php

@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateAttachmentsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('attachments', function (Blueprint $table) {
+            $table->id();
+            $table->morphs('attachable');
+            $table->string('url');
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('attachments');
+    }
+}

phpunit.xml

@@ -21,8 +21,8 @@
         <server name="APP_ENV" value="testing"/>
         <server name="BCRYPT_ROUNDS" value="4"/>
         <server name="CACHE_DRIVER" value="array"/>
-        <!-- <server name="DB_CONNECTION" value="sqlite"/> -->
-        <!-- <server name="DB_DATABASE" value=":memory:"/> -->
+        <server name="DB_CONNECTION" value="sqlite"/>
+        <server name="DB_DATABASE" value=":memory:"/>
         <server name="MAIL_MAILER" value="array"/>
         <server name="QUEUE_CONNECTION" value="sync"/>
         <server name="SESSION_DRIVER" value="array"/>

resources/views/index.blade.php

@@ -5,37 +5,19 @@
     <table>
         <thead>
             <tr>
-                <th>
-                    Title
-                </th>
-                <th>
-                    Attachments
-                </th>
-                <th>
-                    Comments
-                </th>
-                <th> Comment Attachments
-
-                </th>
+                <th>Title</th>
+                <th>Attachments</th>
+                <th>Comments</th>
+                <th>Comment Attachments</th>
             </tr>
         </thead>
         <tbody>
             @foreach ($user->posts as $post)
                 <tr>
-                    <td>
-                        {{ $post->title }}
-                    </td>
-                    <td>
-                        {{ $post->post_attachments()->count() }}
-                    </td>
-                    <td>
-                        {{ $post->comments()->count() }}
-                    </td>
-                    <td>
-                        {{ $post->comments->reduce(function ($carry, $comment) {
-    return $carry + $comment->comment_attachments()->count();
-}) }}
-                    </td>
+                    <td>{{ $post->title }}</td>
+                    <td>{{ $post->attachments_count }}</td>
+                    <td>{{ $post->comments_count }}</td>
+                    <td>{{ $post->comment_attachments_count }}</td>
                 </tr>
             @endforeach
         </tbody>