Error : cannot modify external-realm or non-realm object

[DIGIX666]

I create a file test for my realm but I have this error test pkg: panic: cannot modifiy external-realm or non-realm object

In my code, I think I don't call other realm for modify.
Does anyone know what the problem is?

Link for my code

[deelawn]

Hey @DIGIX666. This looks like it is expected behavior -- the test is trying to modify a package (non-realm) object. The short explanation is that modification of package (/p/) state is not allowed after package initialization. So when that realm test is run, it produces an error because it tries to add a new book to the package's state. The ideal approach for something like this is to store state in the realm by defining a type in the package that has methods to modify the state owned by the realm. Something like:

type Library struct {
    books []Book
}

func (l *Library) AddBook(id, title, author string) {
    l.books = append(l.books, Book{...})
}

Then in the realm:

var lib libPkg.Library

func AddBook(id, title, author string) string {
	lib.AddBook(id, title, author)
	return "Book added successfully"
}

So try something like that and let me know if that fixes it.

[DIGIX666]

Thanks a lot for your explication ^^

I just changed

var lib libPkg.Library

to

var lib library.Library

[deelawn]

No problem -- glad you got it figured out