提要-如何以编程方式设置空白源值

Question

我正在自定义模块中触发提要导入。我需要在该代码中设置一个空白源代码的值，因为该值不在源文件中(在本例中是xml)。有可能这样做吗？

下面是我的代码。

$path = $url . '/path_to_my_file/myfile.xml';
$feeds_source = feeds_source($feeds_importer);
$feeds_config = $feeds_source->getConfigFor($feeds_source->importer->fetcher);

$file_exists = get_headers($path, 1);

# check if file exists:     
if ($file_exists[0] == 'HTTP/1.1 200 OK') {
    $feeds_config['source'] = $path;

    $config = array(
        'process_in_background' => TRUE,
    );

    $feeds_source->setConfigFor($feeds_source->importer->fetcher, $feeds_config);
    $feeds_source->importer->addConfig($config);
    $feeds_source->save();
    $feeds_source->startImport();

    while (FEEDS_BATCH_COMPLETE != $feeds_source->import());
}

<#>更新：

下面是一个更完整的代码。我有三个功能。第一个是原始的，但一个。注意，我从函数参数中获得了$VALUETOPASS变量。

另外两个函数是rooby建议的函数。问题是如何在最后一个函数中使用$VALUETOPASS。现在我只需要那个。

function MYMODULE_CustomImport($VALUETOPASS) {
  $path = $url . '/path_to_my_file/myfile.xml';
  $feeds_source = feeds_source($feeds_importer);
  $feeds_config = $feeds_source->getConfigFor($feeds_source->importer->fetcher);

  $file_exists = get_headers($path, 1);

  # check if file exists:       
  if ($file_exists[0] == 'HTTP/1.1 200 OK') {
    $feeds_config['source'] = $path;

    $config = array(
        'process_in_background' => TRUE,
    );

    $feeds_source->setConfigFor($feeds_source->importer->fetcher, $feeds_config);
    $feeds_source->importer->addConfig($config);
    $feeds_source->save();
    $feeds_source->startImport();

    while (FEEDS_BATCH_COMPLETE != $feeds_source->import());
  }

function MYMODULE_feeds_processor_targets_alter(array &$targets, $entity_type, $bundle) {
  // Set a custom value setter callback for the my field on my node type.
  if ($entity_type == 'node' && $bundle == 'my_bundle') {
    if (isset($targets['my_field'])) {
      $targets['my_field']['callback'] = 'MYMODULE_set_custom_field_value';
    }
  }
}

function MYMODULE_set_custom_field_value(FeedsSource $source, $entity, $target, array $values, array $mapping) {
  $xml = simplexml_load_file($url . $VALUETOPASS . '/api/xml');
  $multijob_array = json_decode(json_encode((array)$xml), TRUE);

  if (isset($multijob_array['action'][2]['cause']['upstreamBuild'])) {
    $multijob_build = $multijob_array['action'][2]['cause']['upstreamBuild'];
  } else {
    $multijob_build = '';
  }

  $entity->{$target}[$entity->language][0]['value'] = $value;
}

Answer 1

在运行导入程序的代码中，只能更改字段映射。

若要在此修改字段映射配置以添加自定义数据(您还可以从此处的映射中删除字段)：

// Load the importer.
$importer_id = 'my_importer';
$feeds_source = feeds_source($importer_id);
// Get the current field mappings.
$field_mappings = $feeds_source->importer->processor->getMappings();

foreach ($field_mappings as &$mapping) {
  // Add an arbitrary value to the mapping of my_field for
  // use later in the processor target callback.
  if ($mapping['target'] == 'my_field') {
    // Your logic goes here to populate this.
    $mapping['my_custom_value'] = 'My custom value';
  }
}

// Set the new field mappings.
$feeds_source->importer->processor->addConfig(array('mappings' => $field_mappings));
// Save the new field mappings.
$feeds_source->save();
// The previous call to FeedsProcessor::getMappings() cached
// the mapping, so we need to clear that before we run the import.
drupal_static_reset('FeedsProcessor::getMappings');

// Run the import.
$feeds_source->startImport();
while (FEEDS_BATCH_COMPLETE != $feeds_source->import());

然后，要更改字段中的实际值，您必须在导入时这样做，当feed从源获取值并将其保存到目标时。

为此，您可以实现hook_feeds_processor_targets_alter()，如下所示：

/**
 * Implements hook_feeds_processor_targets_alter().
 */
function my_module_feeds_processor_targets_alter(array &$targets, $entity_type, $bundle) {
  // Set a custom value setter callback for the my field on my node type.
  if ($entity_type == 'node' && $bundle == 'my_node_type') {
    if (isset($targets['my_field'])) {
      $targets['my_field']['callback'] = 'my_module_set_custom_field_value';
    }
  }
}

/**
 * Custom feeds target setter callback.
 */
function my_module_set_custom_field_value(FeedsSource $source, $entity, $target, array $values, array $mapping) {
  // Set the field value to our custom value if it's there.
  if (!empty($mapping['my_custom_value'])) {
    $entity->{$target}[$entity->language][0]['value'] = $mapping['my_custom_value'];
  }
}