数组中的 Laravel 验证值 - livewire答案

【问题标题】：Laravel validation value in array - livewire数组中的 Laravel 验证值 - livewire
【发布时间】：2021-09-12 05:46:09
【问题描述】：

我有一组在前端循环的状态。我想在后端验证该值是否在数组内。我不断收到所选状态无效的错误。

刀片视图

<select wire:model.defer="state" name="state">
    @foreach($states as $state)
        <option value="{{ $state }}">{{ strtoupper($state) }}</option>
    @endforeach
</select>

控制器（Livewire）

public $states = [
    'sa', 'vic', 'nsw', 'qld', 'act', 'nt', 'wa', 'tas'
];


protected function rules()
{
    $array = [
    'state' => 'required|in:$this->states',
    ];

    return $array;
}

【问题讨论】：

标签： php laravel laravel-livewire

【解决方案1】：

试试这个

protected function rules()
{
    $array = [
    'state' => 'required|in:'.implode(',',$this->states),
    ];

    return $array;
}

或

  protected function rules()
    {
        $array = [
        'state' => ['required',Rule::in($this->states)],
        ];
    
        return $array;
    }

参考：https://laravel.com/docs/8.x/validation#rule-in

【讨论】：

【解决方案2】：

或者，如果您只是在寻找一种基本的状态验证方法/功能，那么它实际上只是一个字符串验证助手，而不管框架如何。这里我们使用美国的州代码。原理是一样的。

/**
 * Validate State code strings
 * 
 * @return boolean
 */
public function getValidStates($str) {
    $states = array(
        "AL","AK","AZ","AR","CA","CO","CT","DE","DC","FL","GA","HI",
        "ID","IL","IN","IA","KS","KY","LA","ME","MD","MA","MI","MN",
        "MS","MO","MT","NE","NV","NH","NJ","NM","NY","NC","ND","OH",
        "OK","OR","PA","RI","SC","SD","TN","TX","UT","VT","VA","WA",
        "WV","WI","WY","AS","GU","MP","PR","VI","FM","MH","PW"
    );

    if (in_array(strtoupper($str), $states)) {
        return true;
    }

    return false;
}

【讨论】：