function DbtngExampleRepository::load
Same name in other branches
- 8.x-1.x dbtng_example/src/DbtngExampleRepository.php \Drupal\dbtng_example\DbtngExampleRepository::load()
- 4.0.x modules/dbtng_example/src/DbtngExampleRepository.php \Drupal\dbtng_example\DbtngExampleRepository::load()
Read from the database using a filter array.
The standard function to perform reads for static queries is Connection::query().
Connection::query() uses an SQL query with placeholders and arguments as parameters.
Drupal DBTNG provides an abstracted interface that will work with a wide variety of database engines.
The following is a query which uses a string literal SQL query. The placeholders will be substituted with the values in the array. Placeholders are marked with a colon ':'. Table names are marked with braces, so that Drupal's' multisite feature can add prefixes as needed.
// SELECT * FROM {dbtng_example} WHERE uid = 0 AND name = 'John'
\Drupal::database()->query("SELECT * FROM {dbtng_example} WHERE uid = :uid and name = :name", [
':uid' => 0,
':name' => 'John',
])
->execute();
For more dynamic queries, Drupal provides Connection::select() API method, so there are several ways to perform the same SQL query. See the handbook page on dynamic queries.
// SELECT * FROM {dbtng_example} WHERE uid = 0 AND name = 'John'
\Drupal::database()->select('dbtng_example')
->fields('dbtng_example')
->condition('uid', 0)
->condition('name', 'John')
->execute();
Here is select() with named placeholders:
// SELECT * FROM {dbtng_example} WHERE uid = 0 AND name = 'John'
$arguments = array(
':name' => 'John',
':uid' => 0,
);
\Drupal::database()->select('dbtng_example')
->fields('dbtng_example')
->where('uid = :uid AND name = :name', $arguments)
->execute();
Conditions are stacked and evaluated as AND and OR depending on the type of query. For more information, read the conditional queries handbook page at: http://drupal.org/node/310086
The condition argument is an 'equal' evaluation by default, but this can be altered:
// SELECT * FROM {dbtng_example} WHERE age > 18
\Drupal::database()->select('dbtng_example')
->fields('dbtng_example')
->condition('age', 18, '>')
->execute();
Parameters
array $entry: An array containing all the fields used to search the entries in the table.
Return value
object An object containing the loaded entries if found.
See also
Drupal\Core\Database\Connection::select()
File
-
modules/
dbtng_example/ src/ DbtngExampleRepository.php, line 199
Class
- DbtngExampleRepository
- Repository for database-related helper methods for our example.
Namespace
Drupal\dbtng_exampleCode
public function load(array $entry = []) {
// Read all the fields from the dbtng_example table.
$select = $this->connection
->select('dbtng_example')
->fields('dbtng_example');
// Add each field and value as a condition to this query.
foreach ($entry as $field => $value) {
$select->condition($field, $value);
}
// Return the result in object format.
return $select->execute()
->fetchAll();
}