Question

如何在导入数据库时用零替换csv文件中的所有空白单元格？

例如：

这个

title;id;rating
cream,20,,
lotion,21,3.5

更改为：

title;id;rating
cream,20,0,
lotion,21,3.5

这是我的功能

public function importProducts(){
    $path = $this->fileLocator->locate('@MyBundle/Resources/products.csv');

    $file = new \SplFileObject($path);

    $reader = new CsvReader($file, ',');
    $reader->setHeaderRowNumber(0);

    // Create the workflow from the reader
    $workflow = new StepAggregator($reader);

    // Create a writer: you need Doctrine’s EntityManager.
    $doctrineWriter = new DoctrineWriter($this->em, 'AppBundle:Product');
    $workflow->addWriter($doctrineWriter);


    // Process the workflow
    $workflow->process();
}

Answer 1

您可以添加a converter以返回0而不是空值：

public function importProducts(){
    $path = $this->fileLocator->locate('@MyBundle/Resources/products.csv');

    $file = new \SplFileObject($path);

    $reader = new CsvReader($file, ',');
    $reader->setHeaderRowNumber(0);

    // Create the workflow from the reader
    $workflow = new StepAggregator($reader);

    // Create a writer: you need Doctrine’s EntityManager.
    $doctrineWriter = new DoctrineWriter($this->em, 'AppBundle:Product');
    $workflow->addWriter($doctrineWriter);

    //Converter for null values
    $converter = new CallbackValueConverter(function ($input) {
        if(null === $input) $input = 0;
        return $input;
    });

    //Adding the converter for the desired columns
    $workflow->addValueConverter('title', $converter); 
    $workflow->addValueConverter('id', $converter); 
    $workflow->addValueConverter('rating', $converter); 

    // Process the workflow
    $workflow->process();
}

Symfony2 Ddeboer包：用0替换空白

1 个答案: