feat: many category and sub can be in playlist

app/Http/Controllers/MusicPlaylistController.php

@@ -8,16 +8,23 @@
 
 class MusicPlaylistController extends Controller
 {
-   public function index(Request $request)
+   public function index(Request $request, $categoryId = null)
         {
-            $query = MusicPlaylist::with(['category', 'subcategory', 'image']);
+            $query = MusicPlaylist::with(['categories', 'subcategories', 'image']);
 
-            if ($request->has('category_id')) {
+            $categoryId = $categoryId ?? $request->input('category_id');
-                $query->where('category_id', $request->category_id)->whereNull('subcategory_id');
+
+            if ($categoryId) {
+                $query->whereHas('categories', function ($q) use ($categoryId) {
+                    $q->where('music_categories.id', $categoryId);
+                });
             }
 
-            if ($request->has('subcategory_id')) {
+            if ($request->filled('subcategory_id')) {
-                $query->where('subcategory_id', $request->subcategory_id);
+                $subcategoryId = $request->input('subcategory_id');
+                $query->whereHas('subcategories', function ($q) use ($subcategoryId) {
+                    $q->where('music_subcategories.id', $subcategoryId);
+                });
             }
 
             $playlists = $query->where('is_active', true)->orderBy('order')->get();
@@ -28,8 +35,10 @@ public function index(Request $request)
     public function store(Request $request)
 {
     $data = $request->validate([
-        'category_id' => 'nullable|exists:music_categories,id',
+        'category_ids' => 'nullable|array',
-        'subcategory_id' => 'nullable|exists:music_subcategories,id',
+        'category_ids.*' => 'integer|exists:music_categories,id',
+        'subcategory_ids' => 'nullable|array',
+        'subcategory_ids.*' => 'integer|exists:music_subcategories,id',
         'name' => 'required|string|max:255',
         'description' => 'nullable|string',
         'image_id' => 'nullable|exists:images,id',
@@ -37,10 +46,10 @@ public function store(Request $request)
         'is_active' => 'nullable|boolean',
     ]);
 
-    // Ensure either category_id or subcategory_id is provided
+    // Ensure at least one category or subcategory is provided
-    if (!$data['category_id'] && !$data['subcategory_id']) {
+    if (empty($data['category_ids']) && empty($data['subcategory_ids'])) {
         return response()->json([
-            'message' => 'Either category_id or subcategory_id is required'
+            'message' => 'At least one category or subcategory is required'
         ], 422);
     }
 
@@ -48,17 +57,20 @@ public function store(Request $request)
 
     $playlist = MusicPlaylist::create($data);
 
+    $playlist->categories()->sync($data['category_ids'] ?? []);
+    $playlist->subcategories()->sync($data['subcategory_ids'] ?? []);
+
     return response()->json([
         'message' => 'Playlist created successfully',
-        'playlist' => $playlist->load(['category', 'subcategory', 'image'])
+        'playlist' => $playlist->load(['categories', 'subcategories', 'image'])
     ], 201);
 }
     
     public function show($id)
         {
             $playlist = MusicPlaylist::with([
-                'category', 
+                'categories',
-                'subcategory',
+                'subcategories',
                 'image',
                 'musics' => function($q) {
                     $q->where('is_active', true)
@@ -100,7 +112,10 @@ public function update(Request $request, $id)
         $playlist = MusicPlaylist::findOrFail($id);
         
         $data = $request->validate([
-            'category_id' => 'sometimes|exists:music_categories,id',
+            'category_ids' => 'sometimes|array',
+            'category_ids.*' => 'integer|exists:music_categories,id',
+            'subcategory_ids' => 'sometimes|array',
+            'subcategory_ids.*' => 'integer|exists:music_subcategories,id',
             'name' => 'sometimes|string|max:255',
             'description' => 'nullable|string',
             'image_id' => 'nullable|exists:images,id',
@@ -114,9 +129,17 @@ public function update(Request $request, $id)
 
         $playlist->update($data);
 
+        if (array_key_exists('category_ids', $data)) {
+            $playlist->categories()->sync($data['category_ids'] ?? []);
+        }
+
+        if (array_key_exists('subcategory_ids', $data)) {
+            $playlist->subcategories()->sync($data['subcategory_ids'] ?? []);
+        }
+
         return response()->json([
             'message' => 'Playlist updated successfully',
-            'playlist' => $playlist->load(['category', 'image'])
+            'playlist' => $playlist->load(['categories', 'subcategories', 'image'])
         ]);
     }
     

app/Models/MusicCategory.php

@@ -4,6 +4,7 @@
 
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;  // ← Add this
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 use Illuminate\Database\Eloquent\Relations\HasMany;    // ← Add this
 class MusicCategory extends Model
 {
@@ -18,9 +19,9 @@ class MusicCategory extends Model
         'order' => 'integer',
     ];
 
-    public function playlists(): HasMany
+    public function playlists(): BelongsToMany
     {
-        return $this->hasMany(MusicPlaylist::class, 'category_id');
+        return $this->belongsToMany(MusicPlaylist::class, 'music_category_playlist', 'category_id', 'playlist_id');
     }
 
     public function subcategories(): HasMany
@@ -45,7 +46,7 @@ public function image(): BelongsTo
     
     public function getActivePlaylistsAttribute()
     {
-        return $this->playlists()->where('is_active', true)->get();
+        return $this->playlists()->where('music_playlists.is_active', true)->get();
     }
 
       // Total music count across all playlists and subcategories

app/Models/MusicPlaylist.php

@@ -4,6 +4,7 @@
 
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;  // ← Add this
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 use Illuminate\Database\Eloquent\Relations\HasMany;    // ← Add this
 use App\Traits\HasComments; // Add this
 use App\Traits\HasLikes;
@@ -14,7 +15,7 @@ class MusicPlaylist extends Model
     protected $table = 'music_playlists';
     
     protected $fillable = [
-        'category_id', 'subcategory_id','name', 'slug', 'description', 'image_id', 'order', 'is_active'
+        'name', 'slug', 'description', 'image_id', 'order', 'is_active'
     ];
     
     protected $casts = [
@@ -31,14 +32,14 @@ class MusicPlaylist extends Model
         'is_saved',
         'saved_count'
     ];
-    public function category(): BelongsTo
+    public function categories(): BelongsToMany
     {
-        return $this->belongsTo(MusicCategory::class, 'category_id');
+        return $this->belongsToMany(MusicCategory::class, 'music_category_playlist', 'playlist_id', 'category_id');
     }
 
-     public function subcategory(): BelongsTo
+    public function subcategories(): BelongsToMany
     {
-        return $this->belongsTo(MusicSubcategory::class, 'subcategory_id');
+        return $this->belongsToMany(MusicSubcategory::class, 'music_subcategory_playlist', 'playlist_id', 'subcategory_id');
     }
     
     

app/Models/MusicSubcategory.php

@@ -4,6 +4,7 @@
 
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
 use Illuminate\Database\Eloquent\Relations\HasMany;
 class MusicSubcategory extends Model
 {
@@ -23,9 +24,9 @@ public function category(): BelongsTo
         return $this->belongsTo(MusicCategory::class, 'category_id');
     }
     
-    public function playlists(): HasMany
+    public function playlists(): BelongsToMany
     {
-        return $this->hasMany(MusicPlaylist::class, 'subcategory_id');
+        return $this->belongsToMany(MusicPlaylist::class, 'music_subcategory_playlist', 'subcategory_id', 'playlist_id');
     }
     
     public function image(): BelongsTo
@@ -35,7 +36,7 @@ public function image(): BelongsTo
     
     public function getActivePlaylistsAttribute()
     {
-        return $this->playlists()->where('is_active', true)->orderBy('order')->get();
+        return $this->playlists()->where('music_playlists.is_active', true)->orderBy('music_playlists.order')->get();
     }
     
     // Get total music count across all playlists in this subcategory

database/migrations/2026_05_31_110000_create_music_playlist_category_pivot_tables.php

@@ -0,0 +1,79 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('music_category_playlist', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('playlist_id')->constrained('music_playlists')->cascadeOnDelete();
+            $table->foreignId('category_id')->constrained('music_categories')->cascadeOnDelete();
+            $table->timestamps();
+
+            $table->unique(['playlist_id', 'category_id']);
+        });
+
+        Schema::create('music_subcategory_playlist', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('playlist_id')->constrained('music_playlists')->cascadeOnDelete();
+            $table->foreignId('subcategory_id')->constrained('music_subcategories')->cascadeOnDelete();
+            $table->timestamps();
+
+            $table->unique(['playlist_id', 'subcategory_id']);
+        });
+
+        // Backfill the new pivots from the existing single columns.
+        if (Schema::hasColumn('music_playlists', 'category_id')) {
+            DB::table('music_playlists')
+                ->whereNotNull('category_id')
+                ->orderBy('id')
+                ->select('id', 'category_id')
+                ->chunk(200, function ($rows) {
+                    $now = now();
+                    $insert = $rows->map(fn ($row) => [
+                        'playlist_id' => $row->id,
+                        'category_id' => $row->category_id,
+                        'created_at' => $now,
+                        'updated_at' => $now,
+                    ])->all();
+
+                    DB::table('music_category_playlist')->insertOrIgnore($insert);
+                });
+        }
+
+        if (Schema::hasColumn('music_playlists', 'subcategory_id')) {
+            DB::table('music_playlists')
+                ->whereNotNull('subcategory_id')
+                ->orderBy('id')
+                ->select('id', 'subcategory_id')
+                ->chunk(200, function ($rows) {
+                    $now = now();
+                    $insert = $rows->map(fn ($row) => [
+                        'playlist_id' => $row->id,
+                        'subcategory_id' => $row->subcategory_id,
+                        'created_at' => $now,
+                        'updated_at' => $now,
+                    ])->all();
+
+                    DB::table('music_subcategory_playlist')->insertOrIgnore($insert);
+                });
+        }
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('music_subcategory_playlist');
+        Schema::dropIfExists('music_category_playlist');
+    }
+};

database/migrations/2026_05_31_110100_drop_category_columns_from_music_playlists_table.php

@@ -0,0 +1,35 @@
+<?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::table('music_playlists', function (Blueprint $table) {
+            $table->dropForeign(['subcategory_id']);
+            $table->dropColumn('subcategory_id');
+
+            $table->dropForeign(['category_id']);
+            $table->dropColumn('category_id');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('music_playlists', function (Blueprint $table) {
+            $table->foreignId('category_id')->nullable()->after('id')
+                ->constrained('music_categories')->nullOnDelete();
+            $table->foreignId('subcategory_id')->nullable()->after('category_id')
+                ->constrained('music_subcategories')->nullOnDelete();
+        });
+    }
+};