EntityMetadataWrapperException:设置文件字段时给出的数据值无效

Question

不能设置field_collection中的file_field节点$order和field_collection被称为field_blueprints:

<?php
$entity_type = "field_collection_item";
$blueprint_obj = entity_create($entity_type, array('field_name' => "field_blueprints") );
$blueprint_obj->setHostEntity('node', $order);
$blueprint_entity = entity_metadata_wrapper($entity_type, $blueprint_obj);
date_default_timezone_set("UTC");
$blueprint_entity->field_blueprint_file->file->set((array)$file);
$blueprint_entity->field_blueprint_comment = (string) $file->filename;
$blueprint_obj->save();
node_save($order);

，这段代码抛出错误:

EntityMetadataWrapperException:给出的数据值无效。确保它匹配所需的数据类型和格式。在EntityDrupalWrapper->set()中(sites//all/modules/entity/includes/entity.wrapper.inc的第736行)

我也试过了:

$blueprint_entity->field_blueprint_file->set((array)$file)
$blueprint_entity->field_blueprint_file->set(array('fid'=>$file->fid))

Answer 1

您需要传递文件对象或具有fid键的数组以使其工作

所以要么是

// Single value field
$blueprint_entity->field_blueprint_file = array('fid' => $file->fid);
// Multi-value field
$blueprint_entity->field_blueprint_file[] = array('fid' => $file->fid);

或:

// Single value field
$blueprint_entity->field_blueprint_file = $file;
// Multi-value field
$blueprint_entity->field_blueprint_file[] = $file;

---

下面是使用value(), set()和save()从实体元数据包装页面的完整示例:

<?php
  $containing_node = node_load($nid);
  $w_containing_node = entity_metadata_wrapper('node', $containing_node);
  // Load the file object in any way
  $file_obj = file_load($fid);
  $w_containing_node->field_attachment_content->file->set( $file_obj );
  // ..or pass an array with the fid
  $w_containing_node->field_attachment_content->set( array('fid' => $fid) );
  $w_containing_node->save();
?>

同样，当处理多值字段(基数> 1)时，确保将其包装到额外的数组中。