How to set value of file field with entity_metadata_wrapper

Question

How do you set the value of a file field when using the entity_metadata_wrapper?

I've tried doing this in code:

$file = new stdClass();
$file->uid = 1;
$file->uri = $file_path;
$file->filename = basename($file_path);
$file->filemime = file_get_mimetype($file_path);
$file->filesize = filesize($file_path);
$file->status = FILE_STATUS_PERMANENT;
$file->display = '1';
file_save($file); // I also tried: $file = file_save($file);

$node = array(
  'type' => 'news_item',
  'uid' => 1,
  'status' => 1,
  'comment' => 0,
  'promote' => 0,
  'language' => 'en',
);

$entity = entity_create('node', $node);

$ewrapper = entity_metadata_wrapper('node', $entity);

$ewrapper->field_document->set((array) $file); // I also tried: $ewrapper->field_document->set($file);

$ewrapper->save(true);
entity_save('node', $entity);

But I get this exception:

EntityMetadataWrapperException: Invalid data value given. Be sure it matches the required data type and format. in EntityMetadataWrapper->set() (line 122 of C:\wamp\www\drupal\sites\all\modules\entity\includes\entity.wrapper.inc).

Any help is very mych appreciated.

Answer 1

Wrapping the file array in another array seems to do the trick for me:

$file = (array) $file;
$items = array($file);
$ewrapper->field_document->set($items);

But I haven't found out why yet...

Answer 2

Well I just found out a simpler and less ugly looking way to set image.

$image_file = A FILE OBJECT; //Lot of choices here : new stdClass(), file_load, etc
$wrapper->FIELD_NAME->file->set($image_file);

Just as taxonomy or node/entity reference, the file field name point on a loaded object, thats how I find out.

---

:: EDIT a posteriori ::

Here how I would have do it with OP question.

// Get the file
$file = file_save_data(file_get_contents('/my_local_path/img1.jpg'), 'public://remote_name.jpg');

// Wrap' it like one of your French girls
$wrapper = entity_metadata_wrapper('node', $node);

// And set the photo
$wrapper->field_photo->file->set($file);

// And save the node
$wrapper->save();

Answer 3

My node already existed and I had to set the following parameters:

$wrapper->field_pdf->set(array('fid'=>$fid, 'display'=>1, 'description'=>'This is a PDF'));

Different set-ups may require different parameters I suppose. If you look in your error logs (admin/reports/dblog) you can see what parameters are needed.

Answer 4

Just in case anybody would find this helpful:

If you don't have an actual file handle and only know the fid you can use:

$wrapper->field_file->set( array( 'fid'=>1234 ) );

And (assuming a file with that fid exists) Drupal will attach the correct file upon $wrapper->save().

Answer 5

You have two ways to do it:

// By loading the file object in any way
$file_obj = file_load($fid);
$w_containing_node->field_attachment_content->file->set( $file_obj );


// By passing an array with the fid
$w_containing_node->field_attachment_content->set( array('fid' => $fid) );

Here is the source of the information: https://www.drupal.org/docs/7/api/entity-api/entity-metadata-wrappers#example-value-set-save