Custom validation problem. The 'ip' never gets included in the request input object before it gets validated, hence the validation fails.

CustomValidation.php

<?php

namespace App\Extentions;

use DB;
use Log;
use Illuminate\Validation\Validator;

class CustomValidation extends Validator {

    public function validateUniqueWith($attribute, $value, $parameters, $validator)
    {
        $input = $this->data;

        $result = DB::table($parameters[0])->where(function($query) use ($attribute, $value, $parameters, $input) {
            $query->where($attribute, '=', $value);
            for ($i=1; $i < count($parameters); $i++) {
                 $query->where($parameters[1], '=', $input[$parameters[1]]);
             }
        })->get();

        return $result ? false : true;
    }
}

CustomValidationRules.php

<?php

namespace App\Providers;

use App\Extentions\CustomValidation;
use Carbon\Carbon;
use Debugbar;
use Illuminate\Support\ServiceProvider;
use Validator;
class CustomValidationRules extends ServiceProvider
{
	public function boot()
    {
        // Need to override the default validator with our own validator
        // We can do that by using the resolver function
        $this->app->validator->resolver(
            function ($translator, $data, $rules, $messages)
            {
                // This class will hold all our custom validations
                return new CustomValidation($translator, $data, $rules, $messages);
            }
        );
    }

    public function register()
    {
        //
    }
}

ReportRequest.php

<?php

namespace App\Requests;

use App\Http\Requests\Request;

class ReportRequest extends Request
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        $this->addIP();
        return [
            'ip_address' => 'required|unique_with:abuse_report,item_id,item_type',
            'item_id'    => 'required|integer',
            'reason'     => 'required'
        ];
    }

    public function attributes()
    {
        return [
            'item_id'   => 'item ID',
        ];
    }

    public function messages()
    {
        return [
            'item_id.unique_with' => 'Duplicate Report: The submitted report was a duplicate of an existing poll or comment report.'
        ];
    }

    protected function addIP()
    {
        $this->merge(
            array(
                'ip_address' => $this->ip()
                )
            );
    }
}