Eloquent如何刪除一筆資料呢？

$user = User::find(1);

$user->delete();

	/**
	 * Delete the model from the database.
	 *
	 * @return bool|null
	 * @throws \Exception
	 */
	public function delete()
	{
		if (is_null($this->primaryKey))
		{
			throw new \Exception("No primary key defined on model.");
		}

		if ($this->exists)
		{
			if ($this->fireModelEvent('deleting') === false) return false;

			// Here, we'll touch the owning models, verifying these timestamps get updated
			// for the models. This will allow any caching to get broken on the parents
			// by the timestamp. Then we will go ahead and delete the model instance.
			$this->touchOwners();

			$this->performDeleteOnModel();

			$this->exists = false;

			// Once the model has been deleted, we will fire off the deleted event so that
			// the developers may hook into post-delete operations. We will then return
			// a boolean true as the delete is presumably successful on the database.
			$this->fireModelEvent('deleted', false);

			return true;
		}
	}

	/**
	 * Perform the actual delete query on this model instance.
	 *
	 * @return void
	 */
	protected function performDeleteOnModel()
	{
		$this->newQuery()->where($this->getKeyName(), $this->getKey())->delete();
	}