code: public function delete()
  	{
  		// Table informations
  		$tableName	= static::tableName();
  		$columns	= static::tableColumns();
  		$idColumn	= static::$idColumn;
  		
  		// Use id column if possible
  		if (isset($this->$idColumn))
  		{
  			$status = Db::query("
  				delete from $tableName
  				where $idColumn = :id
  			", ["id" => $this->$idColumn], static::getDbName(), false);
  		}
  		else
  		{
  			$condition	= "";
  			$params		= [];
  			foreach ($columns as $column)
  			{
  				$name	= $column["column_name"];
  				$key	= $column["column_key"];
  				if (isset($this->$name))
  				{
  					$condition .= "$name = :$name and ";
  					$params[$name] = $this->encodeValue($name);
  				}
  			}
  			$condition = substr($condition, 0, -5);
  
  			var_dump("
  				delete from $tableName
  				where $condition
  			");
  			var_dump($params);
  
  			$status = Db::query("
  				delete from $tableName
  				where $condition
  			", $params, static::getDbName(), false);
  		}
  
  		return $status !== false && $status > 0;
  	}
docs: Delete this model from table
  
  @return bool