Laravel save image using dropzone.js into MySQL - mysql

Question

I'm just trying out dropzone for the first time and would need assistance to set it up. I am getting error 500 thus:
Failed to load resource: the server responded with a status of 500 (Internal Server Error)
This is the controller:
public function storeDocument(Request $request){
$file = $request->file('file');
$fileName = uniqid().$file->getClientOriginalName();
$file->move('gallery/images', $fileName);
$productVerificationValidation = ProductVerificationValidation::findOrFail($request->productDocumentNameId);
$documentsUploaded = $productVerificationValidation->productDocumentUpload()->create([
'gallery_id' => $request->productDocumentNameId,
'user_id' => Auth::user()->id,
'company_id' => $request->company_id,
'product_id' => $request->product_id,
'file_name' => $fileName,
'file_size' => $file->getClientSize(),
'file_mime' => $file->getClientMimeType(),
'file_path' => 'gallery/images'. $fileName
]);
}
This is the route to store the image credentials:
Route::post('product/document/upload/save', array('before'=>'csrf', 'uses'=>'ProductVerificationValidationController#storeDocument'));
This is the form for Dropzone:
<form action="{{url('product/document/upload/save' )}}"
class="dropzone first-input-div" id="addImages">{{csrf_field()}}
{!!Form::hidden('productDocumentNameId', $productVerificationValidation->id)!!}
{!!Form::hidden('product_id', $productVerificationValidation->product_id)!!}
{!!Form::hidden('company_id', $productVerificationValidation->company_id)!!}</form>
This is the model setup:
public function productDocumentUpload(){
return $this->hasMany('App\ProductDocumentUpload');
}
I'm yet to understand what I need to do right. Please help out.