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node_access_write_grants

6 node.module node_access_write_grants($node, $grants, $realm = NULL, $delete = TRUE)
7 node.module node_access_write_grants($node, $grants, $realm = NULL, $delete = TRUE)

Writes a list of grants to the database, deleting any previously saved ones.

If a realm is provided, it will only delete grants from that realm, but it will always delete a grant from the 'all' realm. Modules that utilize node_access can use this function when doing mass updates due to widespread permission changes.

Parameters

$node: The $node being written to. All that is necessary is that it contain a nid.

$grants: A list of grants to write. Each grant is an array that must contain the following keys: realm, gid, grant_view, grant_update, grant_delete. The realm is specified by a particular module; the gid is as well, and is a module-defined id to define grant privileges. each grant_* field is a boolean value.

$realm: If provided, only read/write grants for that realm.

$delete: If false, do not delete records. This is only for optimization purposes, and assumes the caller has already performed a mass delete of some form.

Related topics

1 call to node_access_write_grants()

File

drupal/modules/node/node.module, line 2250
The core that allows content to be submitted to the site. Modules and scripts may programmatically submit nodes using the usual form API pattern.

Code

function node_access_write_grants($node, $grants, $realm = NULL, $delete = TRUE) {
  if ($delete) {
    $query = 'DELETE FROM {node_access} WHERE nid = %d';
    if ($realm) {
      $query .= " AND realm in ('%s', 'all')";
    }
    db_query($query, $node->nid, $realm);
  }

  // Only perform work when node_access modules are active.
  if (count(module_implements('node_grants'))) {
    foreach ($grants as $grant) {
      if ($realm && $realm != $grant['realm']) {
        continue;
      }
      // Only write grants; denies are implicit.
      if ($grant['grant_view'] || $grant['grant_update'] || $grant['grant_delete']) {
        db_query("INSERT INTO {node_access} (nid, realm, gid, grant_view, grant_update, grant_delete) VALUES (%d, '%s', %d, %d, %d, %d)", $node->nid, $grant['realm'], $grant['gid'], $grant['grant_view'], $grant['grant_update'], $grant['grant_delete']);
      }
    }
  }
}