Is it possible to export a field with type "TypedArray[String]" to gdscript?

[zhmt]

type GridMapRandomPlant* {.gdsync,tool.} = ptr object of GridMap
  inWater * {.gdexport.}: bool = false
  noise* {.gdexport.}: GdRef[NoiseTexture2D]
  names* {.gdexport.}: TypedArray[String]

It will produce errors when field "names" is added:

ERROR: Parameter "_fp" is null.
   at: _ref (core/variant/array.cpp:53)
core/variant/array.cpp:53 - Parameter "_fp" is null.

[zhmt]

Should I do something like this?
#213

[panno8M]

✅ Explanation

To export a TypedArray, Array, or Dictionary in Godot using gdext-nim,
you must both:

1. Add the {.gdexport.} pragma, and
2. Initialize the field in the onInit method.

So to fix the issue, you can add the following:

method onInit*(self: GridMapRandomPlant) =
  self.names = newTypedArray[String]()

---

❗ About the Error

The error message:

ERROR: Parameter "_fp" is null.
   at: _ref (core/variant/array.cpp:53)

means that Godot expects the TypedArray to be properly initialized (i.e., _fp must point to valid memory),
but it's currently nil.

---

📚 Reference

• Usage of onInit and onDestroy in gdext-nim
• Reference of newTypedArray()

[panno8M]

I myself am aware of the problems with this specification, so I intend to eliminate this initialization process in the future...

[zhmt]

Thank you for your help! It works.

[zhmt]

The tutorial is getting better. Nice work.