public function deleteAllBlocksExcept($blocks_to_keep)
{
$height_to_keep = $this->findLatestBlockHeight() - $blocks_to_keep;
$affected_rows = Block::where('height', '<=', $height_to_keep)->delete();
return;
}
/**
* remove a block
*
* @return Redirect
*/
protected function postRemoveBlock(Request $request, $id)
{
$block = Block::where('id', $id)->firstOrFail();
$questionaire = $block->questionaire()->get()->first();
$this->authorize('questionaire-block-edit', $questionaire);
$this->removeBlock($block, $request);
return Redirect::action('Observation\\QuestionaireController@getBlocks', $questionaire->id)->with('status', 'Removed');
}