Membuat daftar yang dapat difilter menggunakan kueri Laravel dan Eloquent

Saat Anda mulai menerapkan ketentuan pada kueri Anda, Anda harus memperhatikan fungsi berikut:newQuery() . Fungsi ini akan memungkinkan Anda untuk memulai pembuat kueri baru dan menyambungkan filter/pesanan Anda ke dalamnya.

Contoh Skema:

Kolom di Produk tabel:

id | name | price | date_received

Kolom di tag_produk tabel:

id | tag_id | product_id

Kolom di tag tabel:

id | name

Hubungan:

• Banyak produk memiliki banyak tag

Saya tidak akan menyiapkan model fasih, meskipun perhatikan bahwa model Produk memiliki tag() fungsi dengan hasManyThrough() hubungan

Kelas filter telah disiapkan dengan tujuan utama menerapkan filter &pesanan Anda. Catatan:Kelas dapat diabstraksikan lebih jauh.

Kelas Filter Anda:

class ProductFilter {

    /**
    * Fluent query builder
    * @var mixed $queryBuilder
    */
    private $queryBuilder;

    /**
    * Http Request
    * @var \Illuminate\Http\Request $request
    */
    protected $request;

    /**
    * Filters collection
    * @var array $filters
    */
    private $filters = [];

    /**
    * Order Bys Collection
    * @var array $orderBys
    */
    private $orderBys = [];

    /**
    * Class constructor
    *
    * @param array $input
    */
    public function __construct(\Illuminate\Http\Request $request, &$queryBuilder)
    {
        //Initialize Query Builder
        $this->queryBuilder = $queryBuilder;
        //Get input
        $this->request = $request;

        //Register Filters
        $this->registerFilters();

        //Register Order Bys
        $this->registerOrderBys();
    }

    /**
     * Register Filters in the function below
     * Each filter is in the form of an array
     */

    private function registerFilters()
    {
        $this->filters['product_name'] = ['name'=>'Name',
                                                'value' => $this->request->get('filter_product_name'),
                                                'enabled' => $this->request->has('filter_product_name'),
                                                'function' => 'filterProductName'
                                            ];

        $this->filters['tag'] = ['name'=>'End Date',
                                            'value' => $this->request->get('filter_tag'),
                                            'enabled' => $this->request->has('filter_tag'),
                                            'function' => 'filterTag'
                                        ];
    }

    /**
    * Check if any filters are active
    * Useful to show/hide filter bar
    * 
    * @return bool
    */
    public function isFiltersActive()
    {
        return (boolean)count(
            array_filter($this->filters,function($v){
                return $v['enabled'] === true;
            })
        );        
    }

    /**
    * Register Order Bys in the function below
    * Each order by is in the form of an array
    *
    */
    private function registerOrderBys()
    {
        $this->orderBys['name'] = [
                                    'name' => 'Order By Name',
                                    'value' => $this->request->get('order_by_product_name','ASC'),
                                    'enabled' => $this->request->has('order_by_product_name'),
                                    'function' => 'orderByProductName'
                                  ];
    }

    /**
    * Check if any order bys are active
    * Useful to show/hide order by bar
    * 
    * @return bool
    */
    public function isOrderBysActive()
    {
        return (boolean)count(
            array_filter($this->orderBys,function($v){
                return $v['enabled'] === true;
            })
        );        
    }    

    /**
     * Apply Filters
     * Loop through each filter, check if they are enabled. If they are, apply filter to query builder
     */

    public function applyFilters()
    {
        foreach($this->filters as $filter_name => $filter_array)
        {
            if($filter_array['enabled'] &&
                array_key_exists('function',$filter_array) &&
                method_exists($this,$filter_array['function']))
            {
                $this->{$filter_array['function']}($filter_array);
            }
        }

        return $this;
    }

    /**
     * Apply Order Bys
     * Loop through each order by, check if they are enabled. If they are, apply order by to query builder
     */

    public function applyFilters()
    {
        foreach($this->orderBys as $order_by_name => $order_by_array)
        {
            if($order_by_array['enabled'] &&
                array_key_exists('function',$order_by_array) &&
                method_exists($this,$order_by_array['function']))
            {
                $this->{$order_by_array['function']}($order_by_array);
            }
        }

        return $this;
    }    

    /*
     * Filter Functions: START
     */

    /**
    * Filter by Product Name
    *
    * @param array $filterArray
    */
    private function filterProductName($filterArray)
    {
        $this->queryBuilder
            ->where('name','=',$filterArray['value']);
    }

    /**
    * Filter by Product Tag
    *
    * @param array $filterArray
    */
    private function filterTag($filterArray)
    {
        $this->queryBuilder
        ->whereHas('tag',function($query) use ($filterArray){
            return $query->where('name','=',$filterArray['value']);
        }); 
    }

    /*
     * Filter Functions: END
     */


    /*
    * Order By Functions: START
    */

    /**
    * Order By Name
    * @param array $orderByArray
    */
    private function orderByName($orderByArray)
    {
        $this->queryBuilder
        ->orderBy('name', $orderByArray['value']);
    }

    /*
    * Order By Functions: END
    */    
}

Cara Menggunakan:

//In my controller function

public function getListOfProducts(\Illuminate\Http\Request $request)
{
    //Init Product Query
    $productQuery = \App\Models\Product()::newQuery();

    //Apply all filters and order bys
    $productFilter = app('ProductFilter',[$request,$productQuery])->applyFilters()->applyOrderBys();

    //Fetch Product Result
    $productResult = $productQuery->get();
}