TYPO3.Flow

The query rewriting aspect fails if the policy constraint is the only constraint on the query.

In PersistenceQueryRewritingAspect::rewriteQomQuery() the policy constraint is added to the query by:

if ($additionalCalculatedConstraints !== NULL) {
    $newConstraints = $query->logicalAnd($query->getConstraint(), $query->logicalNot($additionalCalculatedConstraints));
    $query->matching($newConstraints);
}

However, if $query->getConstraint() returns NULL the call of logicalAnd() fails.

This is my quick fix:

if ($query->getConstraint() !== NULL) {
    $newConstraints = $query->logicalAnd($query->getConstraint(), $query->logicalNot($additionalCalculatedConstraints));
} else {
    $newConstraints = $query->logicalNot($additionalCalculatedConstraints);
}