如何从导入 CSV 更新现有数据？与 laravel

Question

我在 laravel 中使用 MaatWesbite 包导入 csv 有一些问题，如何使用导入 CSV 更新现有数据？？

这是我的控制器：

public function storeData(Request $request)
{
    $this->validate($request, [
        'file' => 'required|mimes:csv,txt'
    ]);

    // $date = new DateTime;
    $exchange_rate = new ExchangeRate();
    if ($request->hasFile('file')) {
        $file = $request->file('file');
        $nama_file = date('Y-m-d').$file->getClientOriginalName();
        $destinasi = 'public/kurs/';
        $file->move($destinasi, $nama_file);
        Excel::import(new ExchangeRateImport, public_path('/public/kurs/' . $nama_file));

        Display::where('display_type', ExchangeRate::class)
            ->where('display_id', $exchange_rate->id)
            ->delete();

        if (isset($request->device)) {
            foreach ($request->device as $device) {
                $display = new Display();
                $display->device_id = $device;
                $display->display_type = ExchangeRate::class;
                $display->display_id = $exchange_rate->id;
                $display->save();
            }
        }
    }

    return redirect()->route('signage.exchange-rate.index')->with('success', __('backend.exchange_rate') . __('backend.added'));
}

这是我的模型：

<?php

namespace App\Models\Signage;

use Illuminate\Database\Eloquent\Model;

class ExchangeRate extends Model
{
    protected $table = 'signage_exchange_rates';

    protected $fillable = [
        'country', 'type', 'bank_buy', 'bank_sell'
    ];
}

这是我的导入功能：

<?php

namespace App\Imports;

use App\Models\Signage\Exchangerate;
use Maatwebsite\Excel\Row;
use Maatwebsite\Excel\Concerns\OnEachRow;


class ExchangeRateImport implements OnEachRow
{
    public function onRow(Row $row)
    {
        $row = $row->toArray();

        if (!isset($row[0])) {
            return null;
        }
        
        $exchange = ExchangeRate::updateOrCreate([
            'country' => preg_replace("/[^a-zA-Z0-9]/", "", $row[0]),
            'type' => $row[1],
            'bank_buy' => $row[2],
            'bank_sell' => $row[3],
        ]);

        if (! $exchange->wasRecentlyCreated) {
            $exchange->update([
                'country' => preg_replace("/[^a-zA-Z0-9]/", "", $row[0]),
                'type' => $row[1],
                'bank_buy' => $row[2],
                'bank_sell' => $row[3],
            ]);
        }
    }
}

我已经这样做了，但是当导入成功时，csv 不会替换现有数据总是插入新数据。

Answer 1

也许我来得太晚了，但是这个包有他自己的 Upserts（更新或插入）。

您的 ExchangeImport 文件如下所示：

namespace App\Imports;

use App\Models\Signage\Exchangerate;
use Maatwebsite\Excel\Row;
use Maatwebsite\Excel\Concerns\OnEachRow;
use Maatwebsite\Excel\Concerns\WithUpserts;

class ExchangeRateImport implements OnEachRow, WithUpserts
{

    /**
     * @return string|array
     */
    public function uniqueBy()
    {
        return 'country';
    }

    /**
    * @param array $row
    *
    * @return \Illuminate\Database\Eloquent\Model|null
    */
    public function model(array $row)
    {
        return new ExchangeRate([
            'country' => preg_replace("/[^a-zA-Z0-9]/", "", $row[0]),
            'type' => $row[1],
            'bank_buy' => $row[2],
            'bank_sell' => $row[3],
        ]);
    }
}

Answer 2

在 laravel 文档 UpdateOrCreate 上查看此链接： 因此，在您的 updateOrCreate 方法中，您必须添加一个额外的数组（第一个数组）来帮助模型查找模型是否存在，例如：

$exchange = ExchangeRate::updateOrCreate(
        ['identifier_of_model' => $identifier_of_model],
        [
            'country' => preg_replace("/[^a-zA-Z0-9]/", "", $row[0]),
            'type' => $row[1],
            'bank_buy' => $row[2],
            'bank_sell' => $row[3],
        ]);