いいねボタンの追加

app/Ejaculation.php

@@ -2,7 +2,9 @@
 
 namespace App;
 
+use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Facades\Auth;
 
 class Ejaculation extends Model
 {
@@ -34,4 +36,25 @@ class Ejaculation extends Model
             return $v->name;
         })->all());
     }
+
+    public function likes()
+    {
+        return $this->hasMany(Like::class);
+    }
+
+    public function scopeWithLikes(Builder $query)
+    {
+        if (Auth::check()) {
+            // (ejaculation_id, user_id) でユニークなわけですが、サブクエリ発行させるのとLeft JoinしてNULLかどうかで結果を見るのどっちがいいんでしょうね
+            return $query->withCount([
+                'likes',
+                'likes as is_liked' => function ($query) {
+                    $query->where('user_id', Auth::id());
+                }
+            ]);
+        } else {
+            return $query->withCount('likes')
+                ->addSelect('0 as is_liked');
+        }
+    }
 }

app/Http/Controllers/EjaculationController.php

@@ -78,7 +78,9 @@ class EjaculationController extends Controller
 
     public function show($id)
     {
-        $ejaculation = Ejaculation::findOrFail($id);
+        $ejaculation = Ejaculation::where('id', $id)
+            ->withLikes()
+            ->firstOrFail();
         $user = User::findOrFail($ejaculation->user_id);
 
         // 1つ前のチェックインからの経過時間を求める

app/Http/Controllers/HomeController.php

@@ -69,6 +69,7 @@ SQL
                 ->orderBy('ejaculations.ejaculated_date', 'desc')
                 ->select('ejaculations.*')
                 ->with('user', 'tags')
+                ->withLikes()
                 ->take(10)
                 ->get();
 

app/Http/Controllers/SearchController.php

@@ -21,6 +21,7 @@ class SearchController extends Controller
             ->where('is_private', false)
             ->orderBy('ejaculated_date', 'desc')
             ->with(['user', 'tags'])
+            ->withLikes()
             ->paginate(20)
             ->appends($inputs);
 

app/Http/Controllers/TimelineController.php

@@ -16,6 +16,7 @@ class TimelineController extends Controller
             ->orderBy('ejaculations.ejaculated_date', 'desc')
             ->select('ejaculations.*')
             ->with('user', 'tags')
+            ->withLikes()
             ->paginate(21);
 
         return view('timeline.public')->with(compact('ejaculations'));

app/Http/Controllers/UserController.php

@@ -41,6 +41,7 @@ SQL
         }
         $ejaculations = $query->orderBy('ejaculated_date', 'desc')
             ->with('tags')
+            ->withLikes()
             ->paginate(20);
 
         // よく使っているタグ

app/User.php

@@ -51,4 +51,9 @@ class User extends Authenticatable
     {
         return Auth::check() && $this->id === Auth::user()->id;
     }
+
+    public function likes()
+    {
+        return $this->hasMany(Like::class);
+    }
 }