Laravel：正确存储多选框（Checkbox）值到数据库

<div class="form-group row">
    <label for="hobbies" class="col-md-4 col-form-label text-md-right">Hobbies</label>
    <div class="col-md-6">
        <input type="checkbox" name="hobbies[]" value="Readbooks"/> Readbooks
        <input type="checkbox" name="hobbies[]" value="Games"/> Games
        <input type="checkbox" name="hobbies[]" value="Music"/> Music
        @if ($errors->has('hobbies'))
            <span class="text-danger">{{ $errors->first('hobbies') }}</span>
        @endif
    </div>
</div>

// 错误的 create 方法
public function create(array $data)
{
    return User::create([
        // 尝试在数组上调用 Collection 方法，并错误地使用 implode
        'hobbies' => $data->implode([',', (array) $data->get('hobbies')]),
    ]);
}

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\User; // 假设你的用户模型是 App\Models\User

class RegistrationController extends Controller
{
    /**
     * 处理用户注册请求
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\Response
     */
    public function postRegistration(Request $request)
    {   
        // 验证请求数据 (强烈建议在实际应用中添加验证)
        $request->validate([
            // ... 其他验证规则
            'hobbies' => 'nullable|array', // 确保 hobbies 是一个数组且可以为空
            'hobbies.*' => 'string|max:255', // 验证数组中的每个元素
        ]);

        $data = $request->all();

        // 调用 create 方法来处理数据存储
        $user = $this->create($data);

        return redirect("login")->withSuccess('Great! please login.');
    }

    /**
     * 创建新用户实例
     *
     * @param  array  $data
     * @return \App\Models\User
     */
    public function create(array $data)
    {
        // 检查 'hobbies' 是否存在且为数组，以避免在没有选择任何爱好时出错
        $hobbiesString = isset($data['hobbies']) && is_array($data['hobbies']) 
                         ? implode(',', $data['hobbies']) 
                         : null; // 如果没有选择，则存储为 null 或空字符串

        return User::create([
            // ... 其他用户字段
            'hobbies' => $hobbiesString,
        ]);
    }
}

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class AddHobbiesToUsersTable extends Migration
{
    public function up()
    {
        Schema::table('users', function (Blueprint $table) {
            $table->string('hobbies')->nullable()->after('password'); // 示例
            // 或者 $table->text('hobbies')->nullable()->after('password');
        });
    }

    public function down()
    {
        Schema::table('users', function (Blueprint $table) {
            $table->dropColumn('hobbies');
        });
    }
}