Check validation if other field has value as well as check field has specific value in Laravel-CodePudding

I am doing a project in Laravel and adding some validation rule on my form. Here, I have situation where I a field "A" is required if field "B" has specific value. And after field "A" is required then I want to validate value of field "A".

I am trying to do achieve the same using "required_if" validation rule as given below:

['years' => 'required_if:duration_type,0,gt:0'];

Here I want to check if duration type is 0 then my "years" field must be required and value just greater than 0.

Can someone please guide me on how can I achieve the same?
Thanks in Advance

CodePudding user response：

https://laravel.com/docs/8.x/validation#conditionally-adding-rules

[years => exclude_unless:duration_type,0,required,gt:0];

CodePudding user response：

You can write a DataAwareRule Rule as laravel's doc explained here.

I wrote a sample rule for you that implemented this interface, and retrieves for example b parameter and assigns it to b property of rule object, then you can use it in passes() method.

<?php

namespace App\Rules;

use Illuminate\Contracts\Validation\DataAwareRule;
use Illuminate\Contracts\Validation\Rule;

class ARule implements Rule, DataAwareRule
{
    protected $b;

    /**
     * Determine if the validation rule passes.
     *
     * @param string $attribute
     * @param mixed $value
     * @return bool
     */
    public function passes($attribute, $value)
    {
        if ($this->b == 'specific_value') {
            
            if ($value == 'valid_value') {
                return true;
            }
            
        }
    }

    /**
     * Get the validation error message.
     *
     * @return string
     */
    public function message()
    {
        return 'The validation error message.';
    }

    public function setData($data)
    {
        $this->b = data_get($data, 'b');
    }
}

CodePudding user response：

Here it is,

['years' => 'exclude_unless:duration_type,==,0|required|numeric|gt:0'];

exclude_unless will exclude the rule unless duration_type is 0. When duration_type is 0, years will be required. And gt rule should work properly here when it is numeric.