Laravel fill returns null - php

Question

I want to update a product in laravel, but it does not work properly,
my Controller's update method looks like this:
public function updateProduct(Request $request)
{
# Get input values
$data = $request->all();
$productID = $data['id'];
$product = Product::find($productID);
$product->fill($data);
# Validate input
$validator = Validator::make($request->all(), Product::$rules);
if ($product->save())
{
# save language selection
$lsCounter = 0;
$langSelecName = $request->input('language');
$langSelecFile = $request->file('language');
if ($langSelecName)
{
$projectPath = $dProjectPath . "languages";
foreach ($langSelecName as $langSelecNameKey => $langSelecNameValue)
{
if ($langSelecFile[$lsCounter]['input_vid_lang'] != null)
{
$langVidFileName = $langSelecFile[$lsCounter]['input_vid_lang']->getClientOriginalName();
$languages = new Language();
$languages['short_name'] = $langSelecNameValue;
$languages['input_video'] = $projectLangPath . '\\' . $langVidFileName;
$languages->product()->associate($product);
$langData = [
'languagesShortName' => $languages['short_name'],
'languagesInputVideo' => $languages['input_video']
];
$intProductID = intval($productID);
$findLangId = $languages->find($intProductID);
$findLangId->fill($langData);
if ($languages->save())
{
$langSelecFile[$lsCounter]['input_vid_lang']->move($projectLangPath, $langVidFileName);
}
}
$lsCounter++;
}
}
} else {
return redirect()->route('editProduct', $productID)->with('message', 'Error')->withInput();
}
I get the following error after I try to update it, the error looks like this:
Call to a member function fill() on null
And it points to this line:
$findLangId->fill($langData);
I appreciate some help, thank you.
Edit
Ok people said that $intProductRomID is null, but I get the correct product id if I dd($intProductRomID).

Answer 1

As per the comments, the following line is return null:
$findLangId = $languages->find($intProductRomID);
Meaning this won't be valid:
$findLangId->fill($langData);
In other words, if you were to var_dump out $languages->all(), you will not find $intProductRomID in there. If you are unsure, swap out ->find with ->findOrFail() (which, considering you aren't doing any error catching or checking, you probably should be using it instead).
Edit
After some conversation in the comments, it has been established that the wrong field was being used for reference. Use a where instead:
$languages->where('product_rom_id', $intProductRomID);