pdo = $pdo;
$this->config = $config;
}
/**
* Execute a SQL query against the connection and return a single column result.
*
*
* // Get the total number of rows on a table
* $count = DB::connection()->only('select count(*) from users');
*
* // Get the sum of payment amounts from a table
* $sum = DB::connection()->only('select sum(amount) from payments')
*
*
* @param string $sql
* @param array $bindings
* @return mixed
*/
public function only($sql, $bindings = array())
{
$result = (array) $this->first($sql, $bindings);
return reset($result);
}
/**
* Execute a SQL query against the connection and return the first result.
*
*
* // Execute a query against the database connection
* $user = DB::connection()->first('select * from users');
*
* // Execute a query with bound parameters
* $user = DB::connection()->first('select * from users where id = ?', array($id));
*
*
* @param string $sql
* @param array $bindings
* @return object
*/
public function first($sql, $bindings = array())
{
if (count($results = $this->query($sql, $bindings)) > 0) return $results[0];
}
/**
* Execute a SQL query against the connection.
*
* The method returns the following based on query type:
*
* SELECT -> Array of stdClasses
* UPDATE -> Number of rows affected.
* DELETE -> Number of Rows affected.
* ELSE -> Boolean true / false depending on success.
*
*
* // Execute a query against the database connection
* $users = DB::connection()->query('select * from users');
*
* // Execute a query with bound parameters
* $user = DB::connection()->query('select * from users where id = ?', array($id));
*
*
* @param string $sql
* @param array $bindings
* @return mixed
*/
public function query($sql, $bindings = array())
{
$this->queries[] = compact('sql', 'bindings');
return $this->execute($this->pdo->prepare(trim($sql)), $bindings);
}
/**
* Execute a prepared PDO statement and return the appropriate results.
*
* @param PDOStatement $statement
* @param array $results
* @return mixed
*/
protected function execute(PDOStatement $statement, $bindings)
{
$result = $statement->execute($bindings);
if (strpos(strtoupper($statement->queryString), 'SELECT') === 0)
{
return $statement->fetchAll(PDO::FETCH_CLASS, 'stdClass');
}
elseif (strpos(strtoupper($statement->queryString), 'INSERT') === 0)
{
return $result;
}
return $statement->rowCount();
}
/**
* Begin a fluent query against a table.
*
* @param string $table
* @return Query
*/
public function table($table)
{
return new Query($this, $this->grammar(), $table);
}
/**
* Create a new query grammar for the connection.
*
* @return Grammars\Grammar
*/
protected function grammar()
{
if (isset($this->grammar)) return $this->grammar;
switch (isset($this->config['grammar']) ? $this->config['grammar'] : $this->driver())
{
case 'mysql':
return $this->grammar = new Grammars\MySQL;
default:
return $this->grammar = new Grammars\Grammar;
}
}
/**
* Get the driver name for the database connection.
*
* @return string
*/
public function driver()
{
return $this->pdo->getAttribute(PDO::ATTR_DRIVER_NAME);
}
/**
* Magic Method for dynamically beginning queries on database tables.
*/
public function __call($method, $parameters)
{
return $this->table($method);
}
}