core/app/Http/Controllers/Admin/CreateNewCustomField.php

<?php

namespace App\Http\Controllers\Admin;

use App\Enumerations\CustomFieldResources;
use App\Enumerations\CustomFieldTypes;
use App\Http\Requests\NewCustomFieldRequest;
use App\Models\CustomField;

class CreateNewCustomField extends Controller
{
    public function getNew()
    {
        $types = CustomFieldTypes::getWithTranslations();
        $resources = CustomFieldResources::getWithTranslations();

        return view('admin.customFields.new', [
            'types'     => $types,
            'resources' => $resources
        ]);
    }

    public function postNew(NewCustomFieldRequest $request)
    {
        $customField = new CustomField();

        // set mandatory fields

        $customField->name = $request->name;
        $customField->type_id = $request->type;
        $customField->resource_id = $request->resource;
        $customField->required = $request->has('required');

        // set non-mandatory fields

        if ($request->description) {
            $customField->description = $request->description;
        }

        if ($request->possibleValues) {
            $customField->possible_values = trim(preg_replace('~[\r\n]+~', '|', $request->possibleValues));
        }

        if ($request->defaultValue) {
            $customField->default_value = $request->defaultValue;
        }

        if ($request->regExp) {
            $customField->regexp = $request->regExp;
        }

        if ($request->minLength) {
            $customField->min_length = $request->minLength;
        }

        if ($request->maxLength) {
            $customField->max_length = $request->maxLength;
        }

        $customField->save();

        return redirect()
            ->route('customfields.new')
            ->with('success', trans('admin/customFields.successfullyCreated'));
    }
}