How to skip blank rows in maatwebsite-excel 3.1 for model-way import on Laravel

问题

I'm working on laravel project with maatwebsite-exvel 3.1 to import excel file from file uploding method. This is my StudentsImport class.

public function model(array $row)
{
    return new Student([
        'school_uuid' => Auth::user()->school_uuid,
        'cardid'     => $row[0],
        'prefix'    => $row[1], 
        'name'    => $row[2], 
        'lastname'    => $row[3], 
        'dob'    => $row[4], 
        'address'    => $row[5], 
        'phone'    => $row[6], 
    ]);
}

And below is controller.

 Excel::import(new StudentsImport,  $request->file('file'));

Code work fine. I can import excel's data to database but blank rows also imported. I would like to filter/validate to skip these blanks before put to database. Any advice or guidance on this would be greatly appreciated, Thanks

回答1:

As per the package documentation, support is provided for using Laravel's validation to prevent invalid rows from being inserted.

To use it, implement the WithValidation interface on your importer class and add a rules() method that return the validation rules that should be used to ensure that the row is valid.

public function rules(): array
{
    return [
        '0' => 'required|string',
        '1' => 'required|string',
        '2' => 'required|numeric',
        // so on
    ];
}

回答2:

Please note, the rules() method does not skip empty rows, but throws an error which leads to failure of import and the rows which where validated will be rolled back.

However i found this feature exist in the documentations, simply you have to implement this to your import class: "Maatwebsite\Excel\Concerns\SkipsOnFailure"

Like this for exemple:

class UsersImport implements ToModel, WithValidation, SkipsOnFailure {
    // Your import class
}

Then define a method within your import class to handle the errors:

/**
 * @param Failure[] $failures
 */
public function onFailure(Failure ...$failures)
{
    // Handle the failures how you'd like.
}

Now the rules() method won't throw errors anymore on empty rows and you can handle errors silently, you should still be using the rules() method tho, simply because you need it to throw the errors which are now able to be handled by you, perhaps you could log them to a file or however you do it normally.

In the end you will be able to collect all errors, here is an example from the docs:

$import = new UsersImport();
$import->import('users.xlsx');

dd($import->errors());

So, now you can silently catch the errors and eventually return it to your request, you can even return detailed info like this:

foreach ($import->failures() as $failure) {
   $failure->row(); // row that went wrong
   $failure->attribute(); // either heading key (if using heading row concern) or column index
   $failure->errors(); // Actual error messages from Laravel validator
   $failure->values(); // The values of the row that has failed.
}

This is not copy paste material ok, i just explained how you can access the errors based on examples given in the docs, i leave it up to you to handle this data.

Here is a link to the docs where i found all this info: https://docs.laravel-excel.com/3.1/imports/validation.html#skipping-failures

回答3:

Instead of passing the file directly to this function directly, create a function to filter the data having the blank fields something like below:

function returnNotEmpty($array){
    return array_filter($array, function($i){
        return !empty($i);
    });
}

Use the function like this:

Excel::import(new StudentsImport,  $this->returnNotEmpty($request->file('file')));

来源：https://stackoverflow.com/questions/57212305/how-to-skip-blank-rows-in-maatwebsite-excel-3-1-for-model-way-import-on-laravel

标签

laravel

maatwebsite-excel