[Plugin: WordPress SEO by Yoast] No proper social meta on attachment pages

I have managed getting the right og:image meta.

In class-opengraph.php change line 233 to look like this:

if ( is_singular( 'attachment' ) ) {
  $url = wp_get_attachment_url ( $post->ID );
  if ( $url ) {
     echo "<meta property='og:image' content='" . $url . "'/>\n";
  }
} else {
 echo "<meta property='og:image' content='" . esc_url( $img ) . "'/>\n";
}

It will put the curent image link on attachment page to og:image.

What I need is og:description – I have managet to put image description to og:description, but what I really want is to use parent page og:description. So – help please!

OK… I came up with code for og:description to show image description on attachment pages. If anybody needs this…

Just in class-opengraph.php change this code below the line 284:

$ogdesc = apply_filters( 'wpseo_opengraph_desc', $ogdesc );

if ( $ogdesc && $ogdesc != '' ) {
  if ( $echo !== false )
    echo "<meta property='og:description' content='" . esc_attr( $ogdesc ) . "'/>\n";
    else
      return $ogdesc;
}

to this:

$ogdesc = apply_filters( 'wpseo_opengraph_desc', $ogdesc );

if ( $ogdesc && $ogdesc != '' ) {
  if ( $echo !== false )
    echo "<meta property='og:description' content='" . esc_attr( $ogdesc ) . "'/>\n";
  else
   return $ogdesc;
  } elseif ( is_home() ) {
    echo "<meta property='og:description' content='YOUR CUSTOM CODE FOR FRONT PAGE (still don't know how to call SEO description)'/>\n";
  } elseif ( is_singular( 'attachment' ) ) {
    $description = $post -> post_content;
    if ( $description ) {
      echo "<meta property='og:description' content='" . $description . "'/>\n";
    } else {
      echo "<meta property='og:description' content='YOUR CUSTOM CODE IF YOU DIDN't SET IMAGE DESCRIPTION'/>\n";
    }
}

Hey, thanks for posting this. I was pulling my hair out over that one. However, you are referring to line 233 for the images – depending on which editor I am using the line numbering is different.

Can you post a code excerpt of the class-opengraph.php where that code has to go? THANK YOU !