Question

我正在尝试允许用户使用带有产品信息的Laravel Excel文件下载Excel。我当前的网络路线如下：

Route::get('/excel/release', 'ExcelController@create')->name('Create Excel');

我当前的导出看起来像这样：

class ProductExport implements FromQuery
{
    use Exportable;

    public function __construct(int $id)
    {
        $this->id = $id;
    }

    public function query()
    {
        return ProductList::query()->where('id', $this->id);
    }
}

我当前的控制器如下：

public function create(Request $request) {

    # Only alowed tables
    $alias = [
        'product_list' => ProductExport::class
    ];

    # Ensure request has properties
    if(!$request->has('alias') || !$request->has('id'))
        return Redirect::back()->withErrors(['Please fill in the required fields.'])->withInput();

    # Ensure they can use this
    if(!in_array($request->alias, array_keys($alias)))
        return Redirect::back()->withErrors(['Alias ' . $request->alias . ' is not supported'])->withInput();

    # Download
    return (new ProductExport((int) $request->id))->download('iezon_solutions_' . $request->alias . '_' . $request->id . '.xlsx');
}

当我转到https://example.com/excel/release?alias=product_list&id=1时，它会正确执行并返回一个excel文件。但是，行没有列标题。数据如下所示：

1   150 1   3       2019-01-16 16:37:25 2019-01-16 16:37:25     10

但是，其中应包含ID，费用等列标题。如何在此输出中包含列标题？

Answer 1

根据documentation，您可以将您的班级更改为使用WithHeadings接口，因此它应如下所示：

<?php
namespace App;

use Maatwebsite\Excel\Concerns\FromQuery;
use Maatwebsite\Excel\Concerns\WithHeadings;

class ProductExport implements FromQuery, WithHeadings
{
    use Exportable;

    public function __construct(int $id)
    {
        $this->id = $id;
    }

    public function query()
    {
        return ProductList::query()->where('id', $this->id);
    }

    public function headings()
    {
        return ["your", "headings", "here"];
    }
}

Answer 2

<?php
namespace App\Exports;
use Maatwebsite\Excel\Concerns\FromCollection;
use Maatwebsite\Excel\Concerns\WithHeadings;
use DB;
class LocationTypeExport implements FromCollection,WithHeadings
{
    public function collection()
    {
        $type = DB::table('location_type')->select('id','name')->get();
        return $type ;
    }
     public function headings(): array
    {
        return [
            'id',
            'name',
        ];
    }
}

Answer 3

此代码对我有用

RUN set -ex && \
    yum install -y tar gzip && \
    <Other set of commands which includes mkdir, curl, tar>
    rm -vr properties  && \
    if [ ${arg} == "prod" ]; then  rm -v conf/args.properties; fi

Answer 4

您可以将其与 array_keys 结合使用以动态获取列标题：

use Maatwebsite\Excel\Concerns\FromCollection;
use Maatwebsite\Excel\Concerns\WithHeadings;

class ProductExport implements FromQuery, WithHeadings
{
    use Exportable;

    public function __construct(int $id)
    {
        $this->id = $id;
    }

    public function query()
    {
        return ProductList::query()->where('id', $this->id);
    }

    public function headings(): array
    {
        return array_keys($this->query()->first()->toArray());
    }
}

如果您将它与集合一起使用，您可以这样做：

use Maatwebsite\Excel\Concerns\FromCollection;
use Maatwebsite\Excel\Concerns\WithHeadings;

class ProductExport implements FromCollection, WithHeadings
{
    /**
    * @return \Illuminate\Support\Collection
    */
    public function collection()
    {
        // for selecting specific fields
        //return ProductList::select('id', 'product_name', 'product_price')->get();
        // for selecting all fields
        return ProductList::all();
    }

    public function headings(): array
    {
        return array_keys($this->collection()->first()->toArray());
    }
}

在Laravel中将Eloquent导出到Excel时，如何包含列标题？

5 个答案: