drupal - How to prevent access to node based on custom filter/field in node? -

I'm still looking for a way to control access to a node (my own content type) When the "published" bit set I have a custom field (datetime) that specifies that nodes should be available to visitors. How can I hook it to the 7th drawer?

Best regards, Egil

Take a look at this, you should be able to do the job that you need.