test/app/Http/Requests/System/StoreUserRequest.php

<?php

namespace App\Http\Requests\System;

use App\Http\Models\Role;
use App\Http\Requests\Request;
use Illuminate\Database\Query\Builder;
use Illuminate\Validation\Rule;

class StoreUserRequest extends Request
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        $addition = [];
//        if ($this->input('role_id') == Role::TYPE_CUSTOMER) {
        $addition['site_ids'] = 'nullable|array';
//        }

        return [
                'nickname' => 'required',
                'username' => [
                    'required',
                    'min:3',
                    'max:15',
                    Rule::unique('users')->where(function (Builder $query) {
                        return $query->where('deleted_at', null);
                    })
                ],
                'password' => 'min:5|max:15',
                'phone' => [
                    'nullable',
                    Rule::unique('users')->where(function (Builder $query) {
                        return $query->where('deleted_at', null);
                    })
                ],
                'entry_time' => 'nullable',
                'telephone' => 'nullable',
                'email' => 'nullable',
                'qq' => 'nullable',
                'role_id' => 'required|numeric',
                'status' => 'boolean',

            ] + $addition;
    }

    public function attributes()
    {
        return [
            'nickname' => '昵称',
            'username' => '用户名',
            'password' => '密码',
            'email' => '邮箱',
            'qq' => 'qq号',
            'role_id' => '角色',
            'status' => '状态',
            'sort' => '排序',
            'site_id' => '站点',
            'phone' => '手机号',
            'telephone' => '座机',

        ];
    }
}