Laravel form validation unique using 2 fields

I think you are looking for something like that:

 'unique:table_name,column1,null,null,column2,'.$request->column2.',column3,check3'

The built in unique validator wouldn't really support what you're trying to do. It's purpose is to ensure that a single valid is unique in the database, rather than a composite of two values. However, you can create a custom validator:

Validator::extend('uniqueFirstAndLastName', function ($attribute, $value, $parameters, $validator) {
    $count = DB::table('people')->where('firstName', $value)
                                ->where('lastName', $parameters[0])
                                ->count();

    return $count === 0;
});

You could then access this new rule with:

'firstName' => "uniqueFirstAndLastName:{$request->lastName}"

You'll probably find you might need to tweak your database query a little bit as it's untested.

This is an extensive answer to this question and how to create Laravel custom validator generally, you can simply copy and paste, and try to understand later: Step 1: Create a provider app/Providers/CustomValidatorProvider.php

<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use Illuminate\Support\Facades\Validator as ValidatorFacade;

/**
 * Provider for custom validators. Handles registration for custom validators.
 * 
 */
class CustomValidatorProvider extends ServiceProvider {

    /**
     * An array of fully qualified class names of the custom validators to be
     * registered.
     * 
     * @var array
     */
    protected $validators = [
        \App\Validators\MultipleUniqueValidator::class,
    ];

    /**
     * Bootstrap the application services.
     *
     * @return void
     * @throws \Exception
     */
    public function boot() {
        //register custom validators
        foreach ($this->validators as $class) {
            $customValidator = new $class();
            ValidatorFacade::extend($customValidator->getName(), function() use ($customValidator) {
                //set custom error messages on the validator
                func_get_args()[3]->setCustomMessages($customValidator->getCustomErrorMessages());
                return call_user_func_array([$customValidator, "validate"], func_get_args());
            });
            ValidatorFacade::replacer($customValidator->getName(), function() use ($customValidator) {
                return call_user_func_array([$customValidator, "replacer"], func_get_args());
            });
        }
    }

    /**
     * Register the application services.
     *
     * @return void
     */
    public function register() {
        //
    }

}

Step 2: Update your app.php in your config folder config/app.php to include your created provider in the provider array

App\Providers\CustomValidatorProvider::class,

Step 3: Create your custom validator, in my case, I am creating multiple unique fields validator app/Validators/MultipleUniqueValidator.php

<?php

namespace App\Validators;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Str;
use Illuminate\Validation\Validator;

/**
 * Multiple field uniqueness in laravel
 */
class MultipleUniqueValidator{

    /**
     * Name of the validator.
     *
     * @var string
     */
    protected $name = "multiple_unique";

    /**
     * Return the name of the validator. This is the name that is used to specify
     * that this validator be used.
     * 
     * @return string name of the validator
     */
    public function getName(): string {
        return $this->name;
    }

    /**
     *
     * @param string $message
     * @param string $attribute
     * @param string $rule
     * @param array $parameters
     * @return string
     */
    public function replacer(string $message, string $attribute, string $rule, array $parameters): string {
        unset($parameters[0]);
        $replacement = implode(", ", $parameters);
        $replacement = str_replace("_", " ", $replacement);
        $replacement = Str::replaceLast(", ", " & ", $replacement);
        $replacement = Str::title($replacement);
        return str_replace(":fields", "$replacement", $message);
    }

    /**
     * 
     * @param string $attribute
     * @param mixed $value
     * @param array $parameters
     * @param Validator $validator
     * @return bool
     * @throws \Exception
     */
    public function validate(string $attribute, $value, array $parameters, Validator $validator): bool {
        $model = new $parameters[0];
        if (!$model instanceof Model) {
            throw new \Exception($parameters[0] . " is not an Eloquent model");
        }
        unset($parameters[0]);
        $this->fields = $parameters;

        $query = $model->query();
        $request = app("request");
        foreach($parameters as $parameter){
            $query->where($parameter, $request->get($parameter));
        }

        return $query->count() == 0;
    }

    /**
     * Custom error messages
     * 
     * @return array
     */
    public function getCustomErrorMessages(): array {
        return [
            $this->getName() => ":fields fields should be unique"
        ];
    }

}

Now you can do this in your request

'ANY_FIELD_CAN_CARRY_IT' => 'required|numeric|multiple_unique:'.YOUR_MODEL_HERE::class.',FIELD_1,FIELD_2,FIELD_3...',