如果集合有数据或计数 > 0，如何获得 Eloquent 集合？

Question

Consider this example... which gets the image of product.

This function should only get the data if it exists otherwise it should return null... because it will get the images for a product otherwise the site will display a 404 not found image...

// Product.php

public function getFileImageURL()
{
    $referType = 1; //Product = 1

    if(File::where('file_refer_id','=', $this->id)
            ->where('file_refer_type','=', $referType)
            ->count()>0)
    {
        return $imageFileItems = File::where('file_refer_id','=', $this->id)
            ->where('file_refer_type','=', $referType)
            ->get();
    }
}

EDIT:

Additional details

//ProductController.php

public function show($slug)
{
    $product = $this->productRepository->findProductBySlug($slug);
    $productImages = $product->getFileImageURL();

    return view('pages.product.show', compact('product', 'productImages'));
}

// product/show.blade.php

@if($productImages)
    <a href=" {{ $productImages->first()->file_url }}" data-lightbox="product-images" data-alt="{{ $productImages->first()->title }}" data-title="{{ $productImages->first()->name }}"><img src="{{ $productImages->first()->file_url }}"></a>
@else
    <a href="#"><img alt="Image not found" src="{{ asset('images/products/404.png') }}"></a>
@endif

Answer 1

Calling get() from Eloquent will always return to you an Eloquent collection; which means you can use collection methods on it.

Considering what you are wanting to do, the following should do the trick:

public function getFileImageURL()
{
    $referType = 1; //Product = 1

    $imageFileItems = File::where('file_refer_id','=', $this->id)
            ->where('file_refer_type','=', $referType)
            ->get();

    return $imageFileItems->isNotEmpty() 
        ? $imageFileItems
        : null;
}

This also saves you from having to perform an extra, unneccssary, query to get the count of records.