Лекция для студентов НТУ ХПИ. Рассказывает основы работы с БД в Drupal 7. Рассмотрены различные виды запросов, использование PDO.
- 1. Drupal 7 MySQL (> 90% )PostgreSQLSQLiteMSSQL Oracle ( )
Plain SQL queriesPDO (PHP Data objects)
2. /sites/default/settings.php$databases = array (default =>
//connectionarray (default => //targetarray (database =>
drupal7db,username => root,password => secret,host =>
localhost,port => ,driver => mysql,prefix => ,),),); 3.
SELECTPlain SQL$nodes = db_query( "SELECT nid, titleFROM
{node}WHERE type = :type AND uid = :uid", array(:type => page,
:uid => 1));PDO$nodes = db_select(node, n) ->fields(n,
array(nid, title)) ->condition(n.type, page)
->condition(n.uid, 1) ->execute(); foreach ($nodes as $node)
{$items[$node->nid] = $node->title;} 4. SELECT INNER JOIN,
LIMIT ORDER BYPlain SQL$result = db_query("SELECT n.title, u.name
FROM {node} nINNER JOIN {users} u ON n.uid = u.uid ORDER BY title
DESC LIMIT 0, 10");PDO$query = db_select(node, n)
->innerJoin(users, u, n.uid = u.uid) ->fields(n,
array(title)) ->fields(u, array(name)) ->orderBy(n.title,
DESC) ->range(0, 10) ->execute(); 5. SELECT Plain SQL$count =
db_query( "SELECT COUNT(*) FROM {node}")->fetchField();PDO
1$count = db_select(node) ->countQuery() ->execute()
->fetchField();PDO 2$count = db_select(node)
->addExpression(COUNT(*)) ->execute() ->fetchField(); 6.
SELECT WHEREPlain SQL$nodes = db_query("SELECT * FROM {node} WHERE
title LIKE :titleAND (uid = :uid OR status = :status)",array(:title
=> % . db_like(somestring) . %, :uid => 1, :status =>
0));PDO$nodes = db_select(node,
n)->fields(n)->condition(n.title, % . db_like(somestring) .
%, LIKE)->condition(db_or() ->condition(n.uid, 1)
->condition(n.status, 0))->execute(); 7. SELECT- -
fetchAllKeyed() - fetchAllAssoc($key) - fetchCol() - fetchField() -
rowCount() - - getQueryString() - SQL- 8. UPDATE Plain SQL (
)db_query( "UPDATE {node}SET status = :statusWHERE nid =
:nid",array(:status => 1, :nid => 123));PDOdb_update(node)
->fields(array(status => 1)) ->condition(nid, 123)
->execute(); 9. INSERT Plain SQLdb_query("INSERT INTO {mytable}
(intvar, stringvar, floatvar)VALUES (:int, :string,
:float)",array(:int => 1, :string => somestring, :float =>
3.14));PDOdb_insert(mytable) ->fields(array(intvar => 5,
stringvar => somestring, floatvar => 3.14)) ->execute();
10. DELETE Plain SQLdb_query("DELETE FROM {node} WHERE uid = :uid
AND created < :created",array(:uid => 1, :created =>
time() - 3600));PDOdb_delete(node) ->condition(uid, 1)
->condition(created, time() - 3600, execute(); 11. Variables
variable_set($name, $value)variable_get($name, $default =
NULL)variable_del($name)Cache, Cache_* cache_set($cid, $data, $bin
= cache, $expire = CACHE_PERMANENT)cache_get($cid, $bin =
cache)Node, User , API 12. Master/Slave 13.
http://api.drupal.org/api/drupal/includes!database!database.inc/group/database/7http://drupal.org/developing/api/databasehttp://xandeadx.ru/blog/drupal/88http://php.net/pdo
14. QAreaEmail: [email protected]: eugene.fidelin
