Rules Workflow: Data selector is invalid

Question

A website that has a workflow system based on Rules, as detailed here

Some of the rules use the condition 'User has role(s)', and all these rules now show the following error:

Error: Data selector site:current-user for parameter account is invalid.

The condition must have been valid when it was created, or the rule would not have been saved.

The site uses Entity API 7.x-1.0-rc3 and Rules 7.x-2.2.

Any suggestions? Even deleting and recreating the rule does not work, as I cannot seem to find site-current-user in the Data Selector dropdown.

Answer 1

The problem was with the UUID module. Updating it to the latest version fixed this issue.

Similar problem at: Enabling UUID breaks rules config set by Ubercart.

Answer 2

The error:

Data selector %selector for parameter %name is invalid.

usually happens when specific parameter is not available at given time.

This is the condition which throws the error (rules.core.inc):

// ...
elseif (!empty($this->settings[$name . ':select']) && !$this->applyDataSelector($this->settings[$name . ':select'])) {
  throw new RulesIntegrityException(t("Data selector %selector for parameter %name is invalid.", array('%selector' => $this->settings[$name . ':select'], '%name' => $name)), array($this, 'parameter', $name));
}

and usually it happens, because the parent token is not listed in $this->availableVariables() as per code below:

public function applyDataSelector($selector) {
  $parts = explode(':', str_replace('-', '_', $selector), 2);
  if (($vars = $this->availableVariables()) && isset($vars[$parts[0]]['type'])) {
    $wrapper = rules_wrap_data(NULL, $vars[$parts[0]], TRUE);
    // ...