Added related model updating from belongs_to relationship.

laravel/database/eloquent/model.php

@@ -174,6 +174,22 @@ public static function create($attributes)
 		return ($success) ? $model : false;
 	}
 
+	/**
+	 * Update a model instance in the database.
+	 *
+	 * @param  mixed  $id
+	 * @param  array  $attributes
+	 * @return int
+	 */
+	public static function update($id, $attributes)
+	{
+		$model = new static(array(), true);
+
+		if (static::$timestamps) $attributes['updated_at'] = $model->get_timestamp();
+
+		return $model->query()->where($model->key(), '=', $id)->update($attributes);
+	}
+
 	/**
 	 * Find a model by its primary key.
 	 *

laravel/database/eloquent/relationships/belongs_to.php

@@ -12,6 +12,17 @@ public function results()
 		return parent::first();
 	}
 
+	/**
+	 * Update the parent model of the relationship.
+	 *
+	 * @param  array  $attributes
+	 * @return int
+	 */
+	public function update($attributes)
+	{
+		return $this->model->update($this->foreign_value(), $attributes);
+	}
+
 	/**
 	 * Set the proper constraints on the relationship table.
 	 *
@@ -19,9 +30,7 @@ public function results()
 	 */
 	protected function constrain()
 	{
-		$foreign = $this->base->get_attribute($this->foreign);
+		$this->table->where($this->base->key(), '=', $this->foreign_value());
-
-		$this->table->where($this->base->key(), '=', $foreign);
 	}
 
 	/**
@@ -80,4 +89,14 @@ public function match($relationship, &$children, $parents)
 		}
 	}
 
+	/**
+	 * Get the value of the foreign key from the base model.
+	 *
+	 * @return mixed
+	 */
+	public function foreign_value()
+	{
+		return $this->base->get_attribute($this->foreign);
+	}
+
 }

laravel/database/eloquent/relationships/has_many_and_belongs_to.php

@@ -114,7 +114,9 @@ public function insert($attributes, $joining = array())
 	 */
 	public function delete()
 	{
-		return $this->joining_table()->where($this->foreign_key(), '=', $this->base->get_key())->delete();
+		$id = $this->base->get_key();
+
+		return $this->joining_table()->where($this->foreign_key(), '=', $id)->delete();
 	}
 
 	/**

laravel/database/eloquent/relationships/relationship.php

@@ -57,7 +57,7 @@ public static function foreign($model, $foreign = null)
 	{
 		if ( ! is_null($foreign)) return $foreign;
 
-		// If the model is an object, we will simply get the class of the object and
+		// If the model is an object we'll simply get the class of the object and
 		// then take the basename, which is simply the object name minus the
 		// namespace, and we'll append "_id" to the name.
 		if (is_object($model))