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<?php namespace Illuminate\Database;
use PDO; use Closure; use DateTime; use Illuminate\Database\Query\Processors\Processor; use Doctrine\DBAL\Connection as DoctrineConnection;
class Connection implements ConnectionInterface {
/** * The active PDO connection. * * @var PDO */ protected $pdo;
/** * The active PDO connection used for reads. * * @var PDO */ protected $readPdo;
/** * The query grammar implementation. * * @var \Illuminate\Database\Query\Grammars\Grammar */ protected $queryGrammar;
/** * The schema grammar implementation. * * @var \Illuminate\Database\Schema\Grammars\Grammar */ protected $schemaGrammar;
/** * The query post processor implementation. * * @var \Illuminate\Database\Query\Processors\Processor */ protected $postProcessor;
/** * The event dispatcher instance. * * @var \Illuminate\Events\Dispatcher */ protected $events;
/** * The paginator environment instance. * * @var \Illuminate\Pagination\Paginator */ protected $paginator;
/** * The cache manager instance. * * @var \Illuminate\Cache\CacheManager */ protected $cache;
/** * The default fetch mode of the connection. * * @var int */ protected $fetchMode = PDO::FETCH_ASSOC;
/** * The number of active transactions. * * @var int */ protected $transactions = 0;
/** * All of the queries run against the connection. * * @var array */ protected $queryLog = array();
/** * Indicates whether queries are being logged. * * @var bool */ protected $loggingQueries = true;
/** * Indicates if the connection is in a "dry run". * * @var bool */ protected $pretending = false;
/** * The name of the connected database. * * @var string */ protected $database;
/** * The table prefix for the connection. * * @var string */ protected $tablePrefix = '';
/** * The database connection configuration options. * * @var array */ protected $config = array();
/** * Create a new database connection instance. * * @param PDO $pdo * @param string $database * @param string $tablePrefix * @param array $config * @return void */ public function __construct(PDO $pdo, $database = '', $tablePrefix = '', array $config = array()) { $this->pdo = $pdo;
// First we will setup the default properties. We keep track of the DB // name we are connected to since it is needed when some reflective // type commands are run such as checking whether a table exists. $this->database = $database;
$this->tablePrefix = $tablePrefix;
$this->config = $config;
// We need to initialize a query grammar and the query post processors // which are both very important parts of the database abstractions // so we initialize these to their default values while starting. $this->useDefaultQueryGrammar();
$this->useDefaultPostProcessor(); }
/** * Set the query grammar to the default implementation. * * @return void */ public function useDefaultQueryGrammar() { $this->queryGrammar = $this->getDefaultQueryGrammar(); }
/** * Get the default query grammar instance. * * @return \Illuminate\Database\Query\Grammars\Grammar */ protected function getDefaultQueryGrammar() { return new Query\Grammars\Grammar; }
/** * Set the schema grammar to the default implementation. * * @return void */ public function useDefaultSchemaGrammar() { $this->schemaGrammar = $this->getDefaultSchemaGrammar(); }
/** * Get the default schema grammar instance. * * @return \Illuminate\Database\Schema\Grammars\Grammar */ protected function getDefaultSchemaGrammar() {}
/** * Set the query post processor to the default implementation. * * @return void */ public function useDefaultPostProcessor() { $this->postProcessor = $this->getDefaultPostProcessor(); }
/** * Get the default post processor instance. * * @return \Illuminate\Database\Query\Processors\Processor */ protected function getDefaultPostProcessor() { return new Query\Processors\Processor; }
/** * Get a schema builder instance for the connection. * * @return \Illuminate\Database\Schema\Builder */ public function getSchemaBuilder() { if (is_null($this->schemaGrammar)) { $this->useDefaultSchemaGrammar(); }
return new Schema\Builder($this); }
/** * Begin a fluent query against a database table. * * @param string $table * @return \Illuminate\Database\Query\Builder */ public function table($table) { $processor = $this->getPostProcessor();
$query = new Query\Builder($this, $this->getQueryGrammar(), $processor);
return $query->from($table); }
/** * Get a new raw query expression. * * @param mixed $value * @return \Illuminate\Database\Query\Expression */ public function raw($value) { return new Query\Expression($value); }
/** * Run a select statement and return a single result. * * @param string $query * @param array $bindings * @return mixed */ public function selectOne($query, $bindings = array()) { $records = $this->select($query, $bindings);
return count($records) > 0 ? reset($records) : null; }
/** * Run a select statement against the database. * * @param string $query * @param array $bindings * @return array */ public function select($query, $bindings = array()) { return $this->run($query, $bindings, function($me, $query, $bindings) { if ($me->pretending()) return array();
// For select statements, we'll simply execute the query and return an array // of the database result set. Each element in the array will be a single // row from the database table, and will either be an array or objects. $statement = $me->getReadPdo()->prepare($query);
$statement->execute($me->prepareBindings($bindings));
return $statement->fetchAll($me->getFetchMode()); }); }
/** * Run an insert statement against the database. * * @param string $query * @param array $bindings * @return bool */ public function insert($query, $bindings = array()) { return $this->statement($query, $bindings); }
/** * Run an update statement against the database. * * @param string $query * @param array $bindings * @return int */ public function update($query, $bindings = array()) { return $this->affectingStatement($query, $bindings); }
/** * Run a delete statement against the database. * * @param string $query * @param array $bindings * @return int */ public function delete($query, $bindings = array()) { return $this->affectingStatement($query, $bindings); }
/** * Execute an SQL statement and return the boolean result. * * @param string $query * @param array $bindings * @return bool */ public function statement($query, $bindings = array()) { return $this->run($query, $bindings, function($me, $query, $bindings) { if ($me->pretending()) return true;
$bindings = $me->prepareBindings($bindings);
return $me->getPdo()->prepare($query)->execute($bindings); }); }
/** * Run an SQL statement and get the number of rows affected. * * @param string $query * @param array $bindings * @return int */ public function affectingStatement($query, $bindings = array()) { return $this->run($query, $bindings, function($me, $query, $bindings) { if ($me->pretending()) return 0;
// For update or delete statements, we want to get the number of rows affected // by the statement and return that back to the developer. We'll first need // to execute the statement and then we'll use PDO to fetch the affected. $statement = $me->getPdo()->prepare($query);
$statement->execute($me->prepareBindings($bindings));
return $statement->rowCount(); }); }
/** * Run a raw, unprepared query against the PDO connection. * * @param string $query * @return bool */ public function unprepared($query) { return $this->run($query, array(), function($me, $query) { if ($me->pretending()) return true;
return (bool) $me->getPdo()->exec($query); }); }
/** * Prepare the query bindings for execution. * * @param array $bindings * @return array */ public function prepareBindings(array $bindings) { $grammar = $this->getQueryGrammar();
foreach ($bindings as $key => $value) { // We need to transform all instances of the DateTime class into an actual // date string. Each query grammar maintains its own date string format // so we'll just ask the grammar for the format to get from the date. if ($value instanceof DateTime) { $bindings[$key] = $value->format($grammar->getDateFormat()); } elseif ($value === false) { $bindings[$key] = 0; } }
return $bindings; }
/** * Execute a Closure within a transaction. * * @param Closure $callback * @return mixed * * @throws \Exception */ public function transaction(Closure $callback) { $this->beginTransaction();
// We'll simply execute the given callback within a try / catch block // and if we catch any exception we can rollback the transaction // so that none of the changes are persisted to the database. try { $result = $callback($this);
$this->commit(); }
// If we catch an exception, we will roll back so nothing gets messed // up in the database. Then we'll re-throw the exception so it can // be handled how the developer sees fit for their applications. catch (\Exception $e) { $this->rollBack();
throw $e; }
return $result; }
/** * Start a new database transaction. * * @return void */ public function beginTransaction() { ++$this->transactions;
if ($this->transactions == 1) { $this->pdo->beginTransaction(); }
$this->fireConnectionEvent('beganTransaction'); }
/** * Commit the active database transaction. * * @return void */ public function commit() { if ($this->transactions == 1) $this->pdo->commit();
--$this->transactions;
$this->fireConnectionEvent('committed'); }
/** * Rollback the active database transaction. * * @return void */ public function rollBack() { if ($this->transactions == 1) { $this->transactions = 0;
$this->pdo->rollBack(); } else { --$this->transactions; }
$this->fireConnectionEvent('rollingBack'); }
/** * Get the number of active transactions. * * @return int */ public function transactionLevel() { return $this->transactions; }
/** * Execute the given callback in "dry run" mode. * * @param Closure $callback * @return array */ public function pretend(Closure $callback) { $this->pretending = true;
$this->queryLog = array();
// Basically to make the database connection "pretend", we will just return // the default values for all the query methods, then we will return an // array of queries that were "executed" within the Closure callback. $callback($this);
$this->pretending = false;
return $this->queryLog; }
/** * Run a SQL statement and log its execution context. * * @param string $query * @param array $bindings * @param Closure $callback * @return mixed * * @throws QueryException */ protected function run($query, $bindings, Closure $callback) { $start = microtime(true);
// To execute the statement, we'll simply call the callback, which will actually // run the SQL against the PDO connection. Then we can calculate the time it // took to execute and log the query SQL, bindings and time in our memory. try { $result = $callback($this, $query, $bindings); }
// If an exception occurs when attempting to run a query, we'll format the error // message to include the bindings with SQL, which will make this exception a // lot more helpful to the developer instead of just the database's errors. catch (\Exception $e) { throw new QueryException($query, $this->prepareBindings($bindings), $e); }
// Once we have run the query we will calculate the time that it took to run and // then log the query, bindings, and execution time so we will report them on // the event that the developer needs them. We'll log time in milliseconds. $time = $this->getElapsedTime($start);
$this->logQuery($query, $bindings, $time);
return $result; }
/** * Log a query in the connection's query log. * * @param string $query * @param array $bindings * @param $time * @return void */ public function logQuery($query, $bindings, $time = null) { if (isset($this->events)) { $this->events->fire('illuminate.query', array($query, $bindings, $time, $this->getName())); }
if ( ! $this->loggingQueries) return;
$this->queryLog[] = compact('query', 'bindings', 'time'); }
/** * Register a database query listener with the connection. * * @param Closure $callback * @return void */ public function listen(Closure $callback) { if (isset($this->events)) { $this->events->listen('illuminate.query', $callback); } }
/** * Fire an event for this connection. * * @param string $event * @return void */ protected function fireConnectionEvent($event) { if (isset($this->events)) { $this->events->fire('connection.'.$this->getName().'.'.$event, $this); } }
/** * Get the elapsed time since a given starting point. * * @param int $start * @return float */ protected function getElapsedTime($start) { return round((microtime(true) - $start) * 1000, 2); }
/** * Get a Doctrine Schema Column instance. * * @param string $table * @param string $column * @return \Doctrine\DBAL\Schema\Column */ public function getDoctrineColumn($table, $column) { $schema = $this->getDoctrineSchemaManager();
return $schema->listTableDetails($table)->getColumn($column); }
/** * Get the Doctrine DBAL schema manager for the connection. * * @return \Doctrine\DBAL\Schema\AbstractSchemaManager */ public function getDoctrineSchemaManager() { return $this->getDoctrineDriver()->getSchemaManager($this->getDoctrineConnection()); }
/** * Get the Doctrine DBAL database connection instance. * * @return \Doctrine\DBAL\Connection */ public function getDoctrineConnection() { $driver = $this->getDoctrineDriver();
$data = array('pdo' => $this->pdo, 'dbname' => $this->getConfig('database'));
return new DoctrineConnection($data, $driver); }
/** * Get the current PDO connection. * * @return PDO */ public function getPdo() { return $this->pdo; }
/** * Get the current PDO connection used for reading. * * @return PDO */ public function getReadPdo() { if ($this->transactions >= 1) return $this->getPdo();
return $this->readPdo ?: $this->pdo; }
/** * Set the PDO connection. * * @param PDO $pdo * @return \Illuminate\Database\Connection */ public function setPdo(PDO $pdo) { $this->pdo = $pdo;
return $this; }
/** * Set the PDO connection used for reading. * * @param PDO $pdo * @return \Illuminate\Database\Connection */ public function setReadPdo(PDO $pdo) { $this->readPdo = $pdo;
return $this; }
/** * Get the database connection name. * * @return string|null */ public function getName() { return $this->getConfig('name'); }
/** * Get an option from the configuration options. * * @param string $option * @return mixed */ public function getConfig($option) { return array_get($this->config, $option); }
/** * Get the PDO driver name. * * @return string */ public function getDriverName() { return $this->pdo->getAttribute(\PDO::ATTR_DRIVER_NAME); }
/** * Get the query grammar used by the connection. * * @return \Illuminate\Database\Query\Grammars\Grammar */ public function getQueryGrammar() { return $this->queryGrammar; }
/** * Set the query grammar used by the connection. * * @param \Illuminate\Database\Query\Grammars\Grammar * @return void */ public function setQueryGrammar(Query\Grammars\Grammar $grammar) { $this->queryGrammar = $grammar; }
/** * Get the schema grammar used by the connection. * * @return \Illuminate\Database\Query\Grammars\Grammar */ public function getSchemaGrammar() { return $this->schemaGrammar; }
/** * Set the schema grammar used by the connection. * * @param \Illuminate\Database\Schema\Grammars\Grammar * @return void */ public function setSchemaGrammar(Schema\Grammars\Grammar $grammar) { $this->schemaGrammar = $grammar; }
/** * Get the query post processor used by the connection. * * @return \Illuminate\Database\Query\Processors\Processor */ public function getPostProcessor() { return $this->postProcessor; }
/** * Set the query post processor used by the connection. * * @param \Illuminate\Database\Query\Processors\Processor * @return void */ public function setPostProcessor(Processor $processor) { $this->postProcessor = $processor; }
/** * Get the event dispatcher used by the connection. * * @return \Illuminate\Events\Dispatcher */ public function getEventDispatcher() { return $this->events; }
/** * Set the event dispatcher instance on the connection. * * @param \Illuminate\Events\Dispatcher * @return void */ public function setEventDispatcher(\Illuminate\Events\Dispatcher $events) { $this->events = $events; }
/** * Get the paginator environment instance. * * @return \Illuminate\Pagination\Environment */ public function getPaginator() { if ($this->paginator instanceof Closure) { $this->paginator = call_user_func($this->paginator); }
return $this->paginator; }
/** * Set the pagination environment instance. * * @param \Illuminate\Pagination\Environment|\Closure $paginator * @return void */ public function setPaginator($paginator) { $this->paginator = $paginator; }
/** * Get the cache manager instance. * * @return \Illuminate\Cache\CacheManager */ public function getCacheManager() { if ($this->cache instanceof Closure) { $this->cache = call_user_func($this->cache); }
return $this->cache; }
/** * Set the cache manager instance on the connection. * * @param \Illuminate\Cache\CacheManager|\Closure $cache * @return void */ public function setCacheManager($cache) { $this->cache = $cache; }
/** * Determine if the connection in a "dry run". * * @return bool */ public function pretending() { return $this->pretending === true; }
/** * Get the default fetch mode for the connection. * * @return int */ public function getFetchMode() { return $this->fetchMode; }
/** * Set the default fetch mode for the connection. * * @param int $fetchMode * @return int */ public function setFetchMode($fetchMode) { $this->fetchMode = $fetchMode; }
/** * Get the connection query log. * * @return array */ public function getQueryLog() { return $this->queryLog; }
/** * Clear the query log. * * @return void */ public function flushQueryLog() { $this->queryLog = array(); }
/** * Enable the query log on the connection. * * @return void */ public function enableQueryLog() { $this->loggingQueries = true; }
/** * Disable the query log on the connection. * * @return void */ public function disableQueryLog() { $this->loggingQueries = false; }
/** * Determine whether we're logging queries. * * @return bool */ public function logging() { return $this->loggingQueries; }
/** * Get the name of the connected database. * * @return string */ public function getDatabaseName() { return $this->database; }
/** * Set the name of the connected database. * * @param string $database * @return string */ public function setDatabaseName($database) { $this->database = $database; }
/** * Get the table prefix for the connection. * * @return string */ public function getTablePrefix() { return $this->tablePrefix; }
/** * Set the table prefix in use by the connection. * * @param string $prefix * @return void */ public function setTablePrefix($prefix) { $this->tablePrefix = $prefix;
$this->getQueryGrammar()->setTablePrefix($prefix); }
/** * Set the table prefix and return the grammar. * * @param \Illuminate\Database\Grammar $grammar * @return \Illuminate\Database\Grammar */ public function withTablePrefix(Grammar $grammar) { $grammar->setTablePrefix($this->tablePrefix);
return $grammar; }
}
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