Editing and deleting nodes gives error - "An Unexpected Exception has occured: . "

The reason updating was failing is because I had revisions enabled on my node type. When the node is updated in drupal, the node->vid is always set to the next node_revisions auto increment before it is passed to getByNode(). This causes a mismatch with the last vid saved to tumblr_connect_node.vid

Rather than mess with trying to figure out the correct vid of the node being edited, I suggest we simply pass in the $nid to the getByNode. I'm assuming there will always only be one unique row per node in the tumblr_connect_node table -- so I'm not sure we ever have to narrow the search by vid.

Simply removing vid from the query in getByNode fixes it for me:

  public function getByNode($nid, $vid) {
    $sql = 'SELECT id, post_id from {tumblr_connect_node} where nid = %d';
    $result = db_query($sql,  $nid);

But fixing this the right way gets its fingers into a few different places so I want to confirm this direction before I write up a full patch.