问题描述
有没有办法在验证发生之前修改表单请求类中的输入字段?
Is there a way to modify input fields inside a form request class before the validation takes place?
我想如下修改一些输入日期字段，但它似乎不起作用.
I want to modify some input date fields as follows but it doesn't seem to work.
当我将 $this->start_dt 输入字段设置为 2016-02-06 12:00:00 和 $this->end_dt 到 2016-02-06 13:00:00 我仍然收到验证错误end_dt 必须在 start_dt 之后".这意味着当您更新 rules()<中的 $this->start_dt 和 $this->end_dt 时，输入请求值不会改变/code> 函数.
When I set $this->start_dt input field to 2016-02-06 12:00:00 and $this->end_dt to 2016-02-06 13:00:00 I still get validation error "end_dt must be after start_dt". Which means the input request values aren't getting changed when you update $this->start_dt and $this->end_dt inside the rules() function.
public function rules()
{
if ($this->start_dt){
$this->start_dt = Carbon::createFromFormat('d M Y H:i:s', $this->start_dt . ' ' . $this->start_hr . ':'. $this->start_min . ':00');
}
if ($this->end_dt){
$this->end_dt = Carbon::createFromFormat('d M Y H:i:s', $this->end_dt . ' ' . $this->end_hr . ':'. $this->end_min . ':00');
}
return [
'start_dt' => 'required|date|after:yesterday',
'end_dt' => 'required|date|after:start_dt|before:' . Carbon::parse($this->start_dt)->addDays(30)
];
}
注意: start_dt 和 end_dt 是日期选择器字段，start_hr、start_min 是下拉字段.因此，我需要通过组合所有字段来创建一个日期时间，以便我可以进行比较.
Note: start_dt and end_dt are date picker fields and the start_hr, start_min are drop down fields. Hence I need to create a datetime by combining all the fields so that I can compare.
推荐答案
从 Laravel 5.4 开始，您可以覆盖 ValidatesWhenResolvedTrait 的 prepareForValidation 方法来修改任何输入.Laravel 5.1 应该可以实现类似的功能.
As of laravel 5.4 you can override the prepareForValidation method of the ValidatesWhenResolvedTrait to modify any input. Something similar should be possible for laravel 5.1.
请求中的示例
/**
* Modify the input values
*
* @return void
*/
protected function prepareForValidation() {
// get the input
$input = array_map('trim', $this->all());
// check newsletter
if (!isset($input['newsletter'])) {
$input['newsletter'] = false;
}
// replace old input with new input
$this->replace($input);
}
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