Validating Import CSV at Laravel - validation

Question

I want to import csv file with matlab/Excel at laravel 5.2,
the price should be integer, but when someone input price as string, i need to validate it.
This is my code:
Excel::filter( 'chunk' )->load( $path . $filename )->chunk( 1000, function( $results ) {
foreach ( $results as $import_data ) {
$validation = Validator::make( $import_data->toArray(), [
'code' => 'required|alpha',
'name' => 'alpha',
'number' => 'alpha',
'price' => 'numeric',
'pages' => 'numeric',
'delivery_id' => 'numeric'
] );
if( $validation->fails() ) {
return back();
}
if( $binder = Binder::where( 'code', $import_data->code )->first() ) {
$binder->update( [
'price' => $import_data->price,
'pages' => $import_data->pages
] );
} else {
Binder::create( [
'code' => $import_data->code,
'name' => $import_data->name,
'number' => $import_data->number,
'price' => $import_data->price,
'pages' => $import_data->pages,
'delivery_id' => $import_data->delivery_id
] );
}
}
});
After import csv, my return back() is not working at all, the controller still doing the foreach, how to enable my validation?

Answer 1

You're returning from the chunk() method, and then it goes on to call the next iteration of the same chunk() method, and so on. I would suggest wrapping the entire thing in a try-catch-block and throwing an exception instead.
Edit: like this:
try {
Excel::filter( 'chunk' )->load( $path . $filename )->chunk( 1000, function( $results ) {
foreach ( $results as $import_data ) {
// ...
if( $validation->fails() ) {
throw new Exception();
}
// ...
}
)};
} catch (Exception $e) {
return back();
}