HNWelcomeSystemAdminDcat/app/Admin/Extensions/Exporter/StudentExporter.php

<?php


namespace App\Admin\Extensions\Exporter;


use App\Models\Speciality;
use Dcat\Admin\Grid\Exporters\AbstractExporter;
use Maatwebsite\Excel\Concerns\Exportable;
use Maatwebsite\Excel\Concerns\FromCollection;
use Maatwebsite\Excel\Concerns\WithHeadings;
use Maatwebsite\Excel\Concerns\WithMapping;

class StudentExporter extends AbstractExporter implements WithMapping, WithHeadings, FromCollection
{
    use Exportable;
    protected $fileName = '注册用户';
    protected $titles = [];

    public function __construct()
    {
        $this->fileName = $this->fileName.'_'.time().'.xlsx';//拼接下载文件名称
        $this->titles = [
            'mobile' => '手机号' ,
            'name'=>'姓名',
            'idcard'=>'身份证',
            'sex' => "性别",
            "college" => "二级学院",
            "speciality" => "专业",
            "create_time" => "注册时间",
            "is_test" => "是否为测试号"
        ];
        parent::__construct();
    }

    public function export()
    {
        // TODO: Implement export() method.
        $this->download($this->fileName)->prepare(request())->send();
        exit;
    }

    public function collection()
    {
        // TODO: Implement collection() method.

        return collect($this->buildData());
    }

    public function headings(): array
    {
        // TODO: Implement headings() method.
        return $this->titles();
    }

    public function map($row): array
    {

        $nameInfo = $this->getSpecialityAndCollegeNameById($row["speciality_id"]);

        $sex = $row['sex'] == 1 ? "男" : "女";
        $test = $row['is_test'] == 1 ? "否" : "是";
        // TODO: Implement map() method.
        return [
            $row['mobile'],
            $row['name'],
            "'".$row['idcard'].'',
            $sex,
            $nameInfo["name"],
            $nameInfo["speciality_name"],
            date("Y-m-d H:i:s", $row['create_time']),
            $test
        ];
    }

    public function getSpecialityAndCollegeNameById($id)
    {
        $nameInfo = Speciality::query()->where("speciality.id", $id)->leftJoin("secondary_college as b", "speciality.secondary_college_id", "=", "b.id")->first();

        if(empty($nameInfo)){
            return [
                "name" => "",
                "speciality_name" => ""
            ];
        }

       return $nameInfo->toArray();
    }

}