I’m getting no love from hook_query_alter. I have a simple query to which I want to add a tag, while also adding a node_access tag. Thus the whole query looks like this:

$the_nodes = db_select('node', 'n')      ->condition('n.type', 'some_node_type')      ->fields('n', array('nid', 'title'))      ->addTag('node_access')      ->addTag('my_custom_tag')      ->execute()->fetchAll(); 

I then define a handler in one of my modules and litter it with debugging statements, hoping something will happen:

function mymodule_query_alter(QueryAlterableInterface $the_query) {     dsm("inside mymodule_query_alter");     dsm($the_query);     if ($the_query->hasTag('my_custom_tag')) {         dsm('Found it!');         // do real work here     } } 

I then clear the system cache. Once I’ve done this, the following things happen:

• My handler is running, and reports a number of invocations from various system calls.
• The objects being dumped by the dsm calls are all very much alike — they contain only an alterTags array, which typically has entries for either node_load_multiple or file_load_multiple, but nothing else — certainly nothing like a full Query object.
• None of the alterTags arrays have an entry for my_custom_tag.
• The inner “Found it!” message never fires.

Arggh. This is my first encounter with hook_query_alter(), and I’m probably just missing something basic about its use. Can anybody clue me in? (BTW, based on some browsing around, I’ve also tried defining handlers for my_module_query_my_custom_tag_alter and my_module_query_node_access_alter, but never see anything from them.)

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