Added transaction method to database connection and eloquent model.

laravel/database/connection.php

@@ -84,6 +84,33 @@ class Connection {
 		}
 	}
 
+	/**
+	 * Execute a callback wrapped in a database transaction.
+	 *
+	 * @param  Closure  $callback
+	 * @return void
+	 */
+	public function transaction($callback)
+	{
+		$this->pdo->beginTransaction();
+
+		// After beginning the database transaction, we will call the Closure
+		// so that it can do its database work. If an exception occurs we'll
+		// rollback the transaction and re-throw back to the developer.
+		try
+		{
+			call_user_func($callback);
+		}
+		catch (\Exception $e)
+		{
+			$this->pdo->rollBack();
+
+			throw $e;
+		}
+
+		$this->pdo->commit();
+	}
+
 	/**
 	 * Execute a SQL query against the connection and return a single column result.
 	 *

laravel/database/eloquent/model.php

@@ -103,17 +103,6 @@ abstract class Model {
 		$this->fill($attributes);
 	}
 
-	/**
-	 * Set the accessible attributes for the given model.
-	 *
-	 * @param  array  $attributes
-	 * @return void
-	 */
-	public static function accessible($attributes)
-	{
-		static::$accessible = $attributes;
-	}
-
 	/**
 	 * Hydrate the model with an array of attributes.
 	 *
@@ -157,6 +146,28 @@ abstract class Model {
 		return $this;
 	}
 
+	/**
+	 * Set the accessible attributes for the given model.
+	 *
+	 * @param  array  $attributes
+	 * @return void
+	 */
+	public static function accessible($attributes)
+	{
+		static::$accessible = $attributes;
+	}
+
+	/**
+	 * Execute a callback wrapped in a database transaction.
+	 *
+	 * @param  Closure  $callback
+	 * @return void
+	 */
+	public static function transaction($callback)
+	{
+		with(new static)->query()->connection()->transaction($callback);
+	}
+
 	/**
 	 * Create a new model and store it in the database.
 	 *
@@ -211,9 +222,7 @@ abstract class Model {
 	 */
 	public static function all()
 	{
-		$model = new static;
+		return with(new static)->query()->get();
-
-		return $model->query()->get();
 	}
 
 	/**

laravel/database/eloquent/query.php

@@ -243,7 +243,7 @@ class Query {
 	 *
 	 * @return Connection
 	 */
-	protected function connection()
+	public function connection()
 	{
 		return Database::connection($this->model->connection());
 	}