DrupalCamp Foz - Novas APIs Drupal 7

Novas APIs no Drupal 7

José San Martin

Banco de dados

• “Query builders” paraconsultas INSERT,
UPDATE, DELETE, MERGE, e SELECT.
• Suporteparareplicação master/slave,
transações, consultas multi-insert,delayed
inserts, entre outros.
• Suporte a SQLite.
• Uso do engine InnoDBporpadrão, aoinvés
de MyISAM, emMySQL, quandodisponível

Database layer

• Camada de abstração
• Permiteouso com diversosservidores de
BD
• Baseadonabiblioteca PDO do PHP
• FunçõesespeciaisparaconstruirSELECTs,
INSERTs, UPDATEs, DELETEseMERGEs

select com db_query

Drupal 6:
$query = db_query('SELECT title FROM {node}');

while ($n = db_fetch_object($query)) {
$titles[] = $n->title;
}

select com db_query

Drupal 7:
$results = db_query('SELECT title FROM
{node}');

foreach($results as $n) {
}

select com db_query

Drupal 6:
$query = db_query('
SELECT title FROM {node}
WHERE uid = %d', 1);

select com db_query

Drupal 7:
$results = db_query(
'SELECT title FROM {node}
WHERE uid = :uid’,
array(':uid' => 1)
);

}

select com db_query

Drupal 7:
WHERE title = :title',
array(':title' => 'Foz')
);

}

select com db_query

Drupal 7:
WHERE title LIKE :title',
array(':title' => 'Foz%')
);

}

query objects

• abstraçãoparadescreverumaconsultaaoba
nco de dados
• Passos:
– Crie a query (db_select, db_insert, db_delete)
– Adicionecamposoucondições
– ->execute();

insert

Drupal 6:
$query = db_query(
"INSERT INTO {role}
(name, weight)
VALUES ('%s', %d)",
'Admin', -10
);

insert

Drupal 7:
$fields = array(
'name' => 'Admin’,
'weight' => 0,
);

db_insert('role')->fields($fields)->execute();

O método execute() vairetornaro campo auto_increment
(nessecaso, rid)

ouusando a API do Drupal…

Drupal 6 eDrupal 7:
$fields = array(
'name' => 'Admin’,
'weight' => 0,
);

drupal_write_record('role', $fields);

multi-insert
$values = array(
array(
'title' => 'Example',
'uid' => 1,
'created' => REQUEST_TIME,
),
array(
'title' => 'Example 2',
'uid' => 1,
'created' => REQUEST_TIME,
),
);

multi-insert
$query = db_insert('node')->fields(
array('title', 'uid', 'created')
);

foreach ($values as $record) {
$query->values($record);
}
$query->execute();

O método execute() nãovairetornar nada

db_delete
$num_deleted = db_delete('node')
->condition('nid', 5)
->execute();

O método execute() vairetornar a quantidade de linhasapagadas

db_select
$results = db_select('node', 'n')
->fields('n', array('title'))
->condition('n.uid', 0, '<>')
->execute();

foreach ($results as $n) {
}

conditions
->condition('n.uid', 0, '=')
->condition('n.uid', 0) //igual a linhaacima
->condition('n.uid', 0, '<>')
->condition('n.nid', 300, '>=')
->condition('n.uid', array(1,2,3), 'IN')
->condition('n.title', db_like($st).'%',
'LIKE')
->condition('n.nid', array(10,20), 'BETWEEN')
->isNull('nomedocampo')
->isNotNull('nomedocampo')

db_select: joins
$query = db_select('node', 'n')
->fields('n', array('title'))
->condition('n.uid', 0, '<>');

$alias = $query->join('users', 'u', 'n.uid =
u.uid');

$results = $query->fields('u', array('name'))
->execute();

db_selectoudb_query?

• db_queryémaiseficiente
• db_selectémaisabstratoepermitequery_alt
er

hook_query_alter

• Permitealteraruma query
definidaporoutromódulo
• Baseia-se na tag da $query

hook_query_alter
$query->addTag('node_access');

function
mymodule_query_alter(QueryAlterableInterface$
query) {

if ($query->hasTag('nomedatag')) {
$query->range(0, 2);
$query->range(0, 2);
}
}

Novidades

• Arquivospassam a ser cidadãos de
primeiraclasse, ouseja, entidades
• Stream wrappers
• Managed Files vs. Unmanaged Files
– tabelafiles_managed
– funçõesfile_unmanaged_* paratodas as
operaçõesquenãosalvem dados natabela

Stream Wrappers

• ProvidospeloDrupal
– public://arquivo.txt
– private://outro-arquivo.txt
– temporary://mais-um-arquivo.txt
• Providospormóduloscustomizados:
– youtube://NIfl2o44zb0

copiar um arquivo
$file = file_load(1); // fid

if (file_prepare_directory("public://pasta") {
$copia =
file_copy($file, 'public://pasta/arq.jpg');

// $copiaestásalvanatabelafile_managed

delete_file($copia);
}

exibir a url
$file = file_load(1);

print $file->uri; // public://file.png

$url = file_create_url($file->uri);

print $url;
//
http://localhost/foz/sites/default/files/file

maisinformações: drupal.org/developing/api

José San Martin
jose@chuva-inc.com
http://chuva-inc.com.br

DrupalCamp Foz - Novas APIs Drupal 7

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