Laravel中的互动控制台命令

>在Laravel构建命令行工具时，常见的挑战之一是优雅地处理丢失或不正确的用户输入。 Laravel的提示formissingInput特征通过将标准工匠命令转换为交互式对话来解决这一问题。

>当缺失参数时，您的命令可以通过有用的提示使用户吸引用户，从而通过所需的输入引导他们。这种方法对于复杂的维护任务，部署脚本或您需要确保准确的命令行输入的任何情况而在维护专业且用户友好的界面时尤其有价值。

>

<!-- Syntax highlighted by torchlight.dev -->use Illuminate\Console\Command;
use Illuminate\Contracts\Console\PromptsForMissingInput;

class PublishContent extends Command implements PromptsForMissingInput
{
    protected $signature = 'content:publish {type} {status}';

    protected function promptForMissingArgumentsUsing(): array
    {
        return [
            'type' => 'What type of content are you publishing?',
            'status' => 'Should this be published as draft or live?'
        ];
    }
}

>让我们探索带有交互式提示的数据库备份命令的实践示例：

<!-- Syntax highlighted by torchlight.dev --><?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Illuminate\Contracts\Console\PromptsForMissingInput;

class BackupDatabase extends Command implements PromptsForMissingInput
{
    protected $signature = &#39;db:backup
        {connection? : Database connection to backup}
        {--tables=* : Specific tables to backup}
        {--compress : Compress the backup file}&#39;;
    protected $description = &#39;Create a database backup&#39;;

    protected function promptForMissingArgumentsUsing(): array
    {
        return [
            &#39;connection&#39; => fn () => choice(
                'Which database connection should be backed up?',
                [
                    'mysql' => 'MySQL Primary Database',
                    'sqlite' => 'SQLite Testing Database',
                    'pgsql' => 'PostgreSQL Analytics Database'
                ],
                'mysql'
            ),
            '--tables' => fn () => multiChoice(
                'Select tables to backup (leave empty for all):',
                $this->getAvailableTables()
            ),
            '--compress' => fn () => confirm(
                'Would you like to compress the backup?',
                true
            )
        ];
    }

    private function getAvailableTables(): array
    {
        // Fetch tables from database
        return ['users', 'posts', 'comments', 'orders'];
    }

    public function handle()
    {
        $connection = $this->argument('connection');
        $tables = $this->option('tables');
        $compress = $this->option('compress');
        $this->info("Starting backup of {$connection} database...");

        // Backup logic here...
    }
}

提示formissingInput接口将命令行交互转换为用户友好的对话，使您的工匠命令更加直观，更易于使用。

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