[英]How can I validate the sum of the values in Laravel?
我在blade.php 中有3 个带有类型号的输入标签。 我想验证总和是否等于 100。那么,该怎么做呢? 谢谢你的帮助。
刀片.php
<input type="number" name="number1" />
<input type="number" name="number2" />
<input type="number" name="number3" />
Controller
public function store(Request $request) {
$data = $request->validate([
'number1' => 'required',
'number2' => 'required',
'number3' => 'required',
]);
$sum = $data['number1'] + $data['number2'] + $data['number3'];
$myDb = new Mynumber();
$myDb->number1 = $data['number1'];
$myDb->number2 = $data['number2'];
$myDb->number3 = $data['number3'];
$myDb->save();
}
如果你想留在 Laravel 验证器的范围内,我建议你使用after validation hook 或创建一个临时字段(在 PHP 内,不要使用客户端技术来完成这项工作。)加上所有必要的总和字段并对其进行验证。
$validator = Validator::make([
'field1' => 50,
'field2' => 25,
'field3' => 22,
], [
'field1' => 'required|numeric',
'field2' => 'required|numeric',
'field3' => 'required|numeric',
]);
$validator->after(function ($validator) {
if ($validator->getData()['field1'] + $validator->getData()['field2'] + $validator->getData()['field3'] !== 100) {
$validator->errors()->add('field1', 'Make sure the sum of all fields equals 100.');
}
});
您可以通过在服务提供者中添加新规则来扩展验证器:
$validator->extend("sumsTo", function ($attribute, $value, $parameters) {
$expected = floatval(array_shift($parameters));
$otherParameters = request()->only($parameters);
return floatval(array_sum(array_merge(array_values($otherParameters), [ $value ]))) === $expected;
});
然后你会用它作为:
$request->validate([
'field1' => 'sumsTo:100,field2,field3',
'field2' => 'sumsTo:100,field1,field3'
'field3' => 'sumsTo:100,field1,field2'
]);
这也会将所有 3 个字段标记为失败。
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