Question

我的应用中有多级关联

Category

 |products

  |product_items

   |product_group

    |product_attributes

类别模型

public function products(){
    return $this->belongsToMany(Product::class);
}

产品型号

public function items()
{
    return $this->hasMany(ProductItem2::class);
}

项目模型

public function attribute()
{
    return $this->belongsToMany(AttributeValue::class,'product_groups','item_id','attribute_id')->withTimestamps();
}

属性值

public function attributeName(){
    return $this->belongsTo(Attribute::class,'attribute_id');
}

所有关系都很好，但现在我需要通过示例'颜色'过滤产品

所以我尝试了

 return $this->where('parent_id',0)->whereHas('childrenRecursive')->with('products.items.attribute.attributeName')->get();

当然，它返回所有类别以及所有产品和产品项等

这是迁移文件

Schema::create('categories', function (Blueprint $table) {
        $table->increments('id');
        $table->string('name');
        $table->string('image');
        $table->string('cover')->nullable();
        $table->string('url')->nullable();
        $table->string('cover');
        $table->text('url_cover');
        $table->text('description')->nullabel();
        $table->unsignedInteger('parent_id');
        $table->boolean('elite')->default(0);
        $table->timestamps();
    });
    Schema::create('category_product',function (Blueprint $table){
        $table->integer('category_id');
        $table->integer('product_id');
        $table->primary(['product_id','category_id']);
    });
    Schema::create('products', function (Blueprint $table) {
        $table->increments('id');
        $table->string('name');
        $table->text('description');
        $table->string('serial_number');
        $table->float('price');
        $table->integer('discount');
        $table->enum('type',['pound','percentage']);
        $table->timestamp('start')->nullable();
        $table->timestamp('end')->nullable();
        $table->string('image');
        $table->unsignedInteger('shop_id');
        $table->boolean('recommendation');
        $table->boolean('published');
        $table->integer('preparing_days')->unsigned();
        $table->integer('visits')->defualt(0);
        $table->unsignedInteger('priorty')->defualt(0);
        $table->timestamps();
    });
    Schema::create('product_items', function (Blueprint $table) {
        $table->increments('id');
        $table->unsignedInteger('product_id');
        $table->double('price');
        $table->string('image');
        $table->unsignedInteger('amount');
        $table->timestamps();
    });
    Schema::create('product_groups', function (Blueprint $table) {
        $table->increments('id');
        $table->unsignedInteger('attribute_id');
        $table->unsignedInteger('item_id');
        $table->timestamps();
    });
    Schema::create('attribute_values', function (Blueprint $table) {
        $table->increments('id');
        $table->unsignedInteger('attribute_id');
        $table->string('value');
        $table->timestamps();
    });
    Schema::create('attributes', function (Blueprint $table) {
        $table->increments('id');
        $table->string('name');
        $table->timestamps();
    });

我所有需要返回的属性'color'值（如['red,blue,black']）与每个类别似乎很复杂，需要帮助。

Laravel通过关系

0 个答案: