feat: add support for attachment collections on a model

database/migrations/add_collection_to_attachables_table.php.stub

@@ -0,0 +1,28 @@
+<?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('attachables', function (Blueprint $table) {
+            $table->string('collection')->nullable();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('attachables', function (Blueprint $table) {
+            $table->dropColumn('collection');
+        });
+    }
+};

docs/basic-usage/configuring-your-model.md

@@ -29,6 +29,8 @@ $myModel = ModelName::find($modelId);
 
 // Link attachment to your model.
 $myModel->attachments()->attach($attachment);
+// Or, to add the attachment to a specific collection:
+$myModel->attachments()->attach($attachment, ['collection' => 'collection_name_here']);
 ```
 
 ## Detach attachments
@@ -45,3 +47,40 @@ $myModel = ModelName::find($modelId);
 // Detach attachment from your model.
 $myModel->attachments()->detach($attachment);
 ```
+
+## Retrieve attachments
+You can retrieve the attachments for your model in the following way:
+
+```php
+// Retrieve all attachments
+$model->attachments()->get();
+
+// Retrieve attachments for a specific collection
+$model->attachments()->wherePivot('collection', 'collection_name_here')->get();
+```
+
+To make querying attachments in a specific collection easier, you can add a separate relationship method to your model:
+
+```php
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\MorphToMany;
+use VanOns\LaravelAttachmentLibrary\Concerns\HasAttachments;
+
+class ModelName extends Model
+{
+    use HasAttachments;
+
+    public function gallery(): MorphToMany
+    {
+        return $this->attachmentCollection('gallery');
+    }
+}
+```
+
+This allows you to retrieve the attachments in the `gallery` collection like so:
+
+```php
+$model->gallery()->get();
+```

src/Concerns/HasAttachments.php

@@ -12,4 +12,9 @@ public function attachments(): MorphToMany
     {
         return $this->morphToMany(Config::get('attachment-library.model', Attachment::class), 'attachable');
     }
+
+    public function attachmentCollection(string $collection): MorphToMany
+    {
+        return $this->attachments()->wherePivot('collection', $collection);
+    }
 }

src/LaravelAttachmentLibraryServiceProvider.php

@@ -17,7 +17,7 @@ public function configurePackage(Package $package): void
     {
         $package->name('laravel-attachment-library')
             ->hasConfigFile(['attachment-library', 'glide'])
-            ->hasMigrations(['create_attachments_table', 'create_attachables_table'])
+            ->hasMigrations(['create_attachments_table', 'create_attachables_table', 'add_collection_to_attachables_table'])
             ->runsMigrations()
             ->hasViews('laravel-attachment-library')
             ->hasViewComponent('laravel-attachment-library', Image::class)