Laravel 5集合问题：哪里不等于

Question

I am currently working on a modal where a user can insert an excel file. The task of the system is to upload and/or add a new database record if the records are new or identical to what exists in the database. BUT it also needs a delete function for getting rid of those records where the slug column is not identical to the name column.

At the moment I am using Laravel 5.3, and this is my controller as it is now:

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Product;
use App\Http\Requests;
use Illuminate\Support\Facades\DB;
use Input;
use Maatwebsite\Excel\Facades\Excel;

class ProductsController extends Controller {

public function importExcel(Request $request) {
    if (Input::hasFile('productFile')) {
        $path = Input::file('productFile')->getRealPath();
        $checkbox = Input::get('productCheckbox');
        $data = Excel::load($path, function($reader) {
        })->get();

        if (!empty($data) && $data->count()) {
            foreach ($data as $key => $value) {
                $product = Product::all()->where('slug', $value->slug)->first();
                $product_false = Product::all()->where('slug', '!=' , 'name')->get();

                if ($product_false !== null){
                    //delete row if slug does not matches name
                    dd($product_false);
                }

The dd above returns all products, so the collection query is not working properly (see below for the raw SQL that I am trying to run in this collection)

                if ($product !== null) {
                    //update row if exist
                    $product->name = $value->name;
                    $product->description = $value->description;
                    $product->price = $value->price;
                    $product->save();
                } else {
                    //add new row if not exist
                    $product = new Product;
                    $product->slug = $value->slug;
                    $product->name = $value->name;
                    $product->description = $value->description;
                    $product->price = $value->price;
                    $product->save();
                }

            }
            header("Location: /products");
        }
    }
}

}

This is the Product model:

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Product extends Model
{

/**
 * The attributes that are mass assignable.
 *
 * @var array
 */
protected $fillable = [
    'slug', 'name', 'description', 'price',
];
}

Here is the PHPMyAdmin raw SQL (which works) that I basically am looking for to use in the collection:

SELECT * FROM `products` WHERE `slug` != `name`

I hope someone can help me out from this pit. I have been sailing the waves of the internet for about 12 hours now just to get this done.

~ nitsuJ

Answer 1

I managed to solve it.

$data = Excel::load($path, function($reader) {

            $importedSlugs = $data->select(array('slug'))->toArray();
                    //collection of imported slugs
                    $collectionOfImportedSlugs = collect($importedSlugs)->flatten()->all();

                    //get all product slugs
                    $productSlugs = Product::all()->pluck('slug');

                    //get all different slugs!
                    $diffSlugsArray = $productSlugs->diff($collectionOfImportedSlugs)->all();
                    //dd($diffSlugsArray);

                    foreach ($diffSlugsArray as $diffSlug) {
                        $product_false = Product::all()->where('slug',     $diffSlug)->first();

                        echo $product_false->slug . 'has been deleted!';

                        $product_false->delete();
                    }
        })->get();