ComponentReflection::convertType() empty string problem

[romanbartl]

Hey there,

When you declare persistent variable of int|null type inside of Control, and in URL coresponding parameter is empty string, than type error occurs. From what I've learnt this error happens in ComponentReflection in castScalar() method when you try to check whether data-loss happens. It seems that this peace of code does not count with nullable persistent parameters. It happens because strict typed comparassion.

I would expect that when there is given an empty string in GET/POST, and declared coresponding persistent variable is nullable, than 'null' should be assigned. If it makes sence.

Tested on version: 3.1.17.

[redwormik]

Hi,

I also encountered this, convertType stopped working for empty-string-to-null/nullable conversion after upgrading.
The behaviour changed in https://github.com/nette/application/releases/tag/v3.1.14 (commit 68783c1#diff-605f970edb9605bf1d71055c0e65624965041ddbbb4b26d27182d936cb640410L202)
The previous behaviour seems unintended, given there are no tests for converting to null