Eloquent 按产品分组，根据产品进行不同排序

Question

我目前有以下设置：

类别、子类别、业务、增强和产品模型。

一个Category有很多SubCategory
一个SubCategory有很多Business
一个Business可能有一个Enhancement
一个Enhancement必须有一个Product

产品可以是增强列表、高级列表或附加功能。如果企业带来了增强版或高级版列表，则会记录在增强版中 table。

因此，产品#1 = 高级列表。产品 #2 = 增强列表。

我想要的是 return 所选子类别的所有业务，按附加增强功能的产品分组。如果业务有改进，我想随机化订单。如果商家没有产品，我想按名称按 ASC 顺序订购。

因此，我期望的结果是拥有所有企业的完整列表，其中具有高级列表的企业以随机顺序首先列出。然后所有具有增强列表的企业以随机顺序排列。然后所有其他没有增强的业务，按字母顺序排列。

我目前使用以下代码按名称顺序列出了所有企业：

SubCategory::where('slug', $subCategory)->where('category_id', $category->id)
    ->with(['businesses' => function($query) {
        $query->orderBy('name', 'ASC');
}])->firstOrFail();

类别模型：

class Category extends Model
{   
    public function subCategories()
    {
        return $this->hasMany('\App\SubCategory');
    }
}

子类别模型：

class SubCategory extends Model
{

    public function businesses()
    {
        return $this->hasMany('\App\Business');
    }

    public function category()
    {
        return $this->belongsTo('\App\Category');
    }
}

商业模式：

class Business extends Model
{

    public function subCategory()
    {
        return $this->belongsTo('\App\SubCategory');
    }

    public function enhancements()
    {
        return $this->hasMany('\App\Enhancement');
    }
}

增强模型：

class Enhancement extends Model
{
    public function business()
    {
        return $this->belongsTo('\App\Business');
    }

    public function product()
    {
        return $this->belongsTo('\App\Product');
    }
}

产品型号：

class Product extends Model { }

迁移：

Schema::create('categories', function (Blueprint $table) {
    $table->increments('id');
    $table->string('name')->unique();
    $table->string('slug')->unique();
    $table->string('featured_image');
    $table->text('description');
    $table->unsignedInteger('sort_order')->nullable();
    $table->timestamps();
    $table->softDeletes();
});


Schema::create('sub_categories', function (Blueprint $table) {
    $table->increments('id');
    $table->unsignedInteger('category_id');
    $table->string('name')->unique();
    $table->string('slug')->unique();
    $table->string('featured_image');
    $table->text('description')->nullable();
    $table->unsignedInteger('sort_order')->nullable();
    $table->timestamps();
    $table->softDeletes();

    $table->foreign('category_id')->references('id')->on('categories');
});


Schema::create('businesses', function (Blueprint $table) {
    $table->increments('id');
    $table->unsignedInteger('resort_id');
    $table->unsignedInteger('sub_category_id');
    $table->string('name');
    $table->string('slug')->unique();
    $table->string('logo')->nullable();
    $table->text('description');
    $table->text('content')->nullable();
    $table->string('county')->nullable();
    $table->string('postcode')->nullable();

    $table->timestamps();

    $table->foreign('resort_id')->references('id')->on('resorts');
    $table->foreign('sub_category_id')->references('id')->on('sub_categories');
});


Schema::create('enhancements', function (Blueprint $table) {
    $table->increments('id');
    $table->unsignedInteger('business_id');
    $table->unsignedInteger('product_id');
    $table->dateTime('from_date');
    $table->dateTime('to_date');
    $table->timestamps();
    $table->softDeletes();

    $table->foreign('business_id')->references('id')->on('businesses');
    $table->foreign('product_id')->references('id')->on('products');
});


Schema::create('products', function (Blueprint $table) {
    $table->increments('id');
    $table->string('name');
    $table->string('slug')->unique();
    $table->string('image');
    $table->text('description');
    $table->float('yearly_price');
    $table->float('monthly_price');
    $table->timestamps();
});

Answer 1

这应该适合你：

SubCategory::where('slug', $subCategory)
    ->where('category_id', $category->id)
    ->with(['businesses' => function($query) {
        $query->select('businesses.*')
            ->leftJoin('enhancements', function($join) {
                $join->on('enhancements.business_id', '=', 'businesses.id')
                    ->join('products', 'products.id', 'enhancements.product_id');
            })
            ->orderByRaw('FIELD(products.slug, ?, ?) DESC', ['enhanced-listing', 'premium-listing'])
            ->orderByRaw('CASE WHEN products.slug IS NOT NULL THEN RAND() ELSE businesses.name END');
    }])->firstOrFail();

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