Ternary mode: result with negative number causes error on SpEL expression import

[enlightenedmouse]

Describe the bug
When using ternary mode and a result of any condition or default is a negative number e.g. -1, the SPEL expression is generated correctly but if that same expression is imported an error occurs: "Can't convert arg of type op-minus"

To Reproduce
Import the SpEL expression "(num > 0 ? num : -1)" into the demo query builder

Expected behavior
The expression should be successfully parsed and have the negative number displayed.

[johnkennedyb]

I'd like to work on the issue where importing a SpEL expression like (num > 0 ? num : -1) throws an error due to the negative number. The issue seems to come from how the parser handles the unary minus (-1) during import. I plan to fix this by updating the parser to correctly recognize and handle negative numbers in ternary expressions, and then add tests to make sure it works in all cases.

Why I'm the best for the job fit

I’ve worked with expression parsers and query builders before and understand how these kinds of bugs happen—especially with unary operators like -. I can quickly identify the root cause and apply a clean fix that improves how SpEL expressions are imported. I’m confident I can solve this and improve the overall reliability of the system.

[johnkennedyb]

@ukrbublik , it has been fixed, please check for pr

[ukrbublik]

What is the number of PR?

[johnkennedyb]

@ukrbublik (Issue #1280)

[sebmaz93]

is this issue fixed ? I couldn't find any PRs related to this issue.

@ukrbublik (Issue #1280)