code: protected function encodeValue($column)
  	{
  		/// @todo for compatibility
  		$val = in_array($column, static::$jsons) ? to_json($this->$column) : $this->$column;
  
  		// Convert jsons into valid json strings
  		if (isset(static::$casts[$column]) && (static::$casts[$column] === "object" || static::$casts[$column] === "array"))
  			$val = to_json($this->$column);
  
  		// Convert bools to ints
  		if (is_bool($val)) $val = (int)$val;
  
  		return $val;
  	}
docs: Get column value
  
  @param string $column name of the column
  
  @return string