diff --git a/packages/admin/src/Filament/Resources/DiscountResource/RelationManagers/ProductConditionRelationManager.php b/packages/admin/src/Filament/Resources/DiscountResource/RelationManagers/ProductConditionRelationManager.php
index 760b24f86..3e8608438 100644
--- a/packages/admin/src/Filament/Resources/DiscountResource/RelationManagers/ProductConditionRelationManager.php
+++ b/packages/admin/src/Filament/Resources/DiscountResource/RelationManagers/ProductConditionRelationManager.php
@@ -7,7 +7,6 @@
 use Filament\Tables\Table;
 use Illuminate\Database\Eloquent\Model;
 use Lunar\Admin\Support\RelationManagers\BaseRelationManager;
-use Lunar\Facades\ModelManifest;
 use Lunar\Models\Product;
 
 class ProductConditionRelationManager extends BaseRelationManager
@@ -39,9 +38,7 @@ public function getDefaultTable(Table $table): Table
             ->paginated(false)
             ->modifyQueryUsing(
                 fn ($query) => $query->whereIn('type', ['condition'])
-                    ->wherePurchasableType(
-                        ModelManifest::getMorphMapKey(Product::class)
-                    )
+                    ->wherePurchasableType(Product::morphName())
                     ->whereHas('purchasable')
             )
             ->headerActions([
diff --git a/packages/admin/src/Filament/Resources/DiscountResource/RelationManagers/ProductLimitationRelationManager.php b/packages/admin/src/Filament/Resources/DiscountResource/RelationManagers/ProductLimitationRelationManager.php
index 2c771d326..9432e8efa 100644
--- a/packages/admin/src/Filament/Resources/DiscountResource/RelationManagers/ProductLimitationRelationManager.php
+++ b/packages/admin/src/Filament/Resources/DiscountResource/RelationManagers/ProductLimitationRelationManager.php
@@ -7,7 +7,6 @@
 use Filament\Tables\Table;
 use Illuminate\Database\Eloquent\Model;
 use Lunar\Admin\Support\RelationManagers\BaseRelationManager;
-use Lunar\Facades\ModelManifest;
 use Lunar\Models\Product;
 
 class ProductLimitationRelationManager extends BaseRelationManager
@@ -33,9 +32,7 @@ public function getDefaultTable(Table $table): Table
             ->paginated(false)
             ->modifyQueryUsing(
                 fn ($query) => $query->whereIn('type', ['limitation', 'exclusion'])
-                    ->wherePurchasableType(
-                        ModelManifest::getMorphMapKey(Product::class)
-                    )
+                    ->wherePurchasableType(Product::morphName())
                     ->whereHas('purchasable')
             )
             ->headerActions([
diff --git a/packages/admin/src/Filament/Resources/DiscountResource/RelationManagers/ProductRewardRelationManager.php b/packages/admin/src/Filament/Resources/DiscountResource/RelationManagers/ProductRewardRelationManager.php
index 3ae3d4a88..e23cc9568 100644
--- a/packages/admin/src/Filament/Resources/DiscountResource/RelationManagers/ProductRewardRelationManager.php
+++ b/packages/admin/src/Filament/Resources/DiscountResource/RelationManagers/ProductRewardRelationManager.php
@@ -7,7 +7,6 @@
 use Filament\Tables\Table;
 use Illuminate\Database\Eloquent\Model;
 use Lunar\Admin\Support\RelationManagers\BaseRelationManager;
-use Lunar\Facades\ModelManifest;
 use Lunar\Models\Product;
 
 class ProductRewardRelationManager extends BaseRelationManager
@@ -39,9 +38,7 @@ public function getDefaultTable(Table $table): Table
             ->paginated(false)
             ->modifyQueryUsing(
                 fn ($query) => $query->whereIn('type', ['reward'])
-                    ->wherePurchasableType(
-                        ModelManifest::getMorphMapKey(Product::class)
-                    )
+                    ->wherePurchasableType(Product::morphName())
                     ->whereHas('purchasable')
             )
             ->headerActions([
diff --git a/packages/admin/src/Filament/Resources/DiscountResource/RelationManagers/ProductVariantLimitationRelationManager.php b/packages/admin/src/Filament/Resources/DiscountResource/RelationManagers/ProductVariantLimitationRelationManager.php
index 232eddab1..8ad52ee5b 100644
--- a/packages/admin/src/Filament/Resources/DiscountResource/RelationManagers/ProductVariantLimitationRelationManager.php
+++ b/packages/admin/src/Filament/Resources/DiscountResource/RelationManagers/ProductVariantLimitationRelationManager.php
@@ -7,7 +7,6 @@
 use Filament\Tables\Table;
 use Illuminate\Database\Eloquent\Model;
 use Lunar\Admin\Support\RelationManagers\BaseRelationManager;
-use Lunar\Facades\ModelManifest;
 use Lunar\Models\Product;
 use Lunar\Models\ProductVariant;
 
@@ -35,9 +34,7 @@ public function getDefaultTable(Table $table): Table
             ->paginated(false)
             ->modifyQueryUsing(
                 fn ($query) => $query->whereIn('type', ['limitation', 'exclusion'])
-                    ->wherePurchasableType(
-                        ModelManifest::getMorphMapKey(ProductVariant::class)
-                    )
+                    ->wherePurchasableType(ProductVariant::morphName())
                     ->whereHas('purchasable')
             )
             ->headerActions([