Module development and code questions

Is there some documentation on the node access table? I want to know where the gid links up with the user id. Also what realm means. I'm looking to creating my own access control for a custom application and I could really use the help.

These are the fields:

nid
gid
realm
grant_view
grant_update
grant_delete

Thanks.

Is there a way to make a module do this:

When viewing a node of a category, automatically show the recent nodes of that category?

Hi !

I have developped a module that allow to make a captive portal with drupal (in combinaison with chillispot).
Image : chillispot, drupal, multi-site... Yes !

I'm still interesting in having such a module, but I cannot continue his developpement for 2 main reasons :

First time submission. Submitted a new project using Creat Content -> Project. Now I don't see any mention of the fact that a new project has been submitted. No email, no "pending" status, just nothing. It is as if the submission has disappeared into thin air?

Are we supposed to be able to see the submitted project in a pending queue while await approval?

Thanks.

Fatal error: Call to undefined function: form_group() in /home/public_html/drupal/modules/taxonomy_block/taxonomy_block.module on line 120

Any idea?

Does Flexiblock works for 4.7?

I get this error:

Fatal error: Call to undefined function: form_checkbox() in /public_html/drupal/modules/flexiblock/flexiblock.module on line 141