function tripal_db_persistent_chado
1.x tripal_core_chado.api.inc | tripal_db_persistent_chado() |
Instantiate or Return a persistent chado connection. This should not be confused with PHP persistent connections. Here we use the drupal db_connect function to
NOTE: cannot use $active_db since a new connection is created each time db_set_active() is called
Return value
A postgresql connection object which can be used by pg_prepare, pg_execute, etc.
13 calls to tripal_db_persistent_chado()
- tripal_core_chado_delete in tripal_core/
api/ tripal_core_chado.api.inc - Provides a generic function for deleting a record(s) from any chado table
- tripal_core_chado_insert in tripal_core/
api/ tripal_core_chado.api.inc - Provides a generic routine for inserting into any Chado table
- tripal_core_chado_select in tripal_core/
api/ tripal_core_chado.api.inc - Provides a generic routine for selecting data from a Chado table
- tripal_core_chado_update in tripal_core/
api/ tripal_core_chado.api.inc - Provides a generic routine for updating into any Chado table
- tripal_core_init in tripal_core/
tripal_core.module - Implements hook_init(). Used to set the search_path, create default content and set default variables.
File
- tripal_core/
api/ tripal_core_chado.api.inc, line 3205 - The Tripal Core API
Code
function tripal_db_persistent_chado() {
global $db_url;
global $persistent_chado;
// get connection if it already exists otherwise we need to set it
if ($persistent_chado) {
return $persistent_chado;
}
else {
if (is_array($db_url) && isset($db_url['chado'])) {
$connection = db_connect($db_url['chado']);
if (!$connection) {
watchdog('tripal_core', "Could not create persistant connection", array(), WATCHDOG_ERROR);
return FALSE;
}
$persistent_chado = $connection;
}
else {
if (is_array($db_url)) {
$connection = db_connect($db_url['default']);
}
else {
$connection = db_connect($db_url);
}
if (!$connection) {
$persistent_chado = NULL;
watchdog('tripal_core', "Could not create persistant connection", array(), WATCHDOG_ERROR);
return FALSE;
}
$persistent_chado = $connection;
}
return $connection;
}
return FALSE;
}