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SQLiteConnection.php
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SQLiteConnection.php
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<?php
namespace Illuminate\Database;
use Exception;
use Illuminate\Database\Query\Grammars\SQLiteGrammar as QueryGrammar;
use Illuminate\Database\Query\Processors\SQLiteProcessor;
use Illuminate\Database\Schema\Grammars\SQLiteGrammar as SchemaGrammar;
use Illuminate\Database\Schema\SQLiteBuilder;
use Illuminate\Database\Schema\SqliteSchemaState;
use Illuminate\Filesystem\Filesystem;
class SQLiteConnection extends Connection
{
/**
* Create a new database connection instance.
*
* @param \PDO|\Closure $pdo
* @param string $database
* @param string $tablePrefix
* @param array $config
* @return void
*/
public function __construct($pdo, $database = '', $tablePrefix = '', array $config = [])
{
parent::__construct($pdo, $database, $tablePrefix, $config);
$enableForeignKeyConstraints = $this->getForeignKeyConstraintsConfigurationValue();
if ($enableForeignKeyConstraints === null) {
return;
}
$schemaBuilder = $this->getSchemaBuilder();
try {
$enableForeignKeyConstraints
? $schemaBuilder->enableForeignKeyConstraints()
: $schemaBuilder->disableForeignKeyConstraints();
} catch (QueryException $e) {
if (! $e->getPrevious() instanceof SQLiteDatabaseDoesNotExistException) {
throw $e;
}
}
}
/**
* Escape a binary value for safe SQL embedding.
*
* @param string $value
* @return string
*/
protected function escapeBinary($value)
{
$hex = bin2hex($value);
return "x'{$hex}'";
}
/**
* Determine if the given database exception was caused by a unique constraint violation.
*
* @param \Exception $exception
* @return bool
*/
protected function isUniqueConstraintError(Exception $exception)
{
return boolval(preg_match('#(column(s)? .* (is|are) not unique|UNIQUE constraint failed: .*)#i', $exception->getMessage()));
}
/**
* Get the default query grammar instance.
*
* @return \Illuminate\Database\Query\Grammars\SQLiteGrammar
*/
protected function getDefaultQueryGrammar()
{
($grammar = new QueryGrammar)->setConnection($this);
return $this->withTablePrefix($grammar);
}
/**
* Get a schema builder instance for the connection.
*
* @return \Illuminate\Database\Schema\SQLiteBuilder
*/
public function getSchemaBuilder()
{
if (is_null($this->schemaGrammar)) {
$this->useDefaultSchemaGrammar();
}
return new SQLiteBuilder($this);
}
/**
* Get the default schema grammar instance.
*
* @return \Illuminate\Database\Schema\Grammars\SQLiteGrammar
*/
protected function getDefaultSchemaGrammar()
{
($grammar = new SchemaGrammar)->setConnection($this);
return $this->withTablePrefix($grammar);
}
/**
* Get the schema state for the connection.
*
* @param \Illuminate\Filesystem\Filesystem|null $files
* @param callable|null $processFactory
*
* @throws \RuntimeException
*/
public function getSchemaState(?Filesystem $files = null, ?callable $processFactory = null)
{
return new SqliteSchemaState($this, $files, $processFactory);
}
/**
* Get the default post processor instance.
*
* @return \Illuminate\Database\Query\Processors\SQLiteProcessor
*/
protected function getDefaultPostProcessor()
{
return new SQLiteProcessor;
}
/**
* Get the database connection foreign key constraints configuration option.
*
* @return bool|null
*/
protected function getForeignKeyConstraintsConfigurationValue()
{
return $this->getConfig('foreign_key_constraints');
}
}