production spu

app/Models/ProductPart.php

@@ -45,9 +45,6 @@ class ProductPart extends Model
         return $this->hasMany(ProductPartSku::class, 'part_id')->orderBy('sort', 'desc');
     }
 
-    /**
-     * 属于此分区的商品
-     */
     public function skus()
     {
         return $this->belongsToMany(ProductSku::class, ProductPartSku::class, 'part_id', 'sku_id')->withTimestamps();
@@ -55,7 +52,7 @@ class ProductPart extends Model
 
     public function spus()
     {
-        return $this->belongsToMany(ProductSpu::class, ProductPartSku::class, 'part_id', 'sku_id')->withTimestamps();
+        return $this->belongsToMany(ProductSpu::class, ProductPartSpu::class, 'part_id', 'spu_id')->withTimestamps();
     }
 
     /**

app/Models/ProductPartSpu.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace App\Models;
+
+use EloquentFilter\Filterable;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class ProductPartSpu extends Model
+{
+    use Filterable;
+    use HasFactory;
+
+    /**
+     * @var string
+     */
+    protected $table = 'product_part_spu';
+
+    /**
+     * @var array
+     */
+    protected $attributes = [
+        'sort' => 0,
+    ];
+
+    /**
+     * @var array
+     */
+    protected $fillable = [
+        'part_id',
+        'sku_id',
+        'sort',
+    ];
+
+    public function spu()
+    {
+        return $this->belongsTo(ProductSpu::class, 'sku_id');
+    }
+
+    /**
+     * 此分区商品所属的分区
+     */
+    public function part()
+    {
+        return $this->belongsTo(ProductPart::class, 'part_id');
+    }
+}

database/migrations/2022_06_15_093902_create_product_part_spu_table.php

@@ -0,0 +1,36 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateProductPartSpuTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('product_part_spu', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('part_id')->constrained('product_parts')->onDelete('cascade')->comment('分区 ID');
+            $table->foreignId('spu_id')->constrained('product_spus')->onDelete('cascade')->comment('商品 ID');
+            $table->integer('sort')->default(0)->comment('排序');
+            $table->timestamps();
+
+            $table->unique(['part_id', 'spu_id']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('product_part_spu');
+    }
+}