Two-dimensional arrays are not serialized in some cases

Issue #594 invalid
Alberto Fuentes created an issue


I have a class where I serialize an array of a list of a custom class (List<ClassA>[ ]) and an array of such class (ClassA[ ]). The problem is that first collection (List<ClassA>[ ]) is serialized properly, but the second one is not.

I will attach two simple scripts which you can use to reproduce it. You add those scripts to a Unity project and then you create a (Serialized)ScriptableObject by (right-clicking in Project tab)>Create>Test>OdinTest. You will apprecite that collection1 (array) and collection2 (list) variables don’t serialize the two-dimensional integer array from the custom class, but the collection3 (two-dimensional array) and collection4 (array of list) variables serialize it properly. You can see the result here:

In the cases Odin doesn' show the testArray variable, it’s not stored in the ScriptableObject and the values are lost.

  • I’m using Unity 2019.2.9f1 and Odin 2.1.4.
  • Editor Only mode is disabled.
  • I’m using Windows 10 Pro.

I found a work-around for the issue: I’ll use an array of size 1 of an array of my desired size so Odin will serialize it as a two-dimensional array, but I think it should work the other way too.

Comments (2)

  1. Tor Esa Vestergaard

    I'm afraid this isn't a bug, but Odin working exactly as expected and intended. You can confirm in the serialization debugger that this is the case - and you can find more information about why it is the case here.

    Otherwise, thank you for an excellent issue report! 🙂 We really do appreciate it.

  2. Alberto Fuentes reporter

    Oh, sorry, I understand now. Thank you for your quick reply!

    Just in case someone needs something similar, the best solution seems to be adding the [Sirenix.Serialization.OdinSerialize] and [NonSerialized]attributes to that variable, so it will be serialized just with Odin.

    Also, good job with Odin and its Serialization Debugger tool, really useful!

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