Question [SOLVED] Entity cache can't be cleared

I keep getting this error

Code (CSharp):

1. SerializationException: Failed to deserialize Property=[Value] for Type=[Unity.Collections.FixedString32Bytes]. The default constructed instance does not match the deserialized type. The property needs to be writable, default constructed with the correct type, or ignored by serialization using [DontSerializeAttribute]

I have only 2 properties with the type of

FixedString32Bytes

and the name of

Value

. I change the type and name, and the error still there. Even I clear entity cache from perferences, and delete library & obj folders, the error still there.

How to fully clean cache?

 

I finally know what happened. The

Value

is from

FixedString32Bytes

and it is a get-only property.

Code (CSharp):

1. [Serializable]
2.     [StructLayout(LayoutKind.Sequential, Size=32)]
3.     [GenerateTestsForBurstCompatibility]
4.     public partial struct FixedString32Bytes
5.         : INativeList<byte>
6.         , IUTF8Bytes
7.         , IComparable<String>
8.         , IEquatable<String>
9.         , IComparable<FixedString32Bytes>
10.         , IEquatable<FixedString32Bytes>
11.         , IComparable<FixedString64Bytes>
12.         , IEquatable<FixedString64Bytes>
13.         , IComparable<FixedString128Bytes>
14.         , IEquatable<FixedString128Bytes>
15.         , IComparable<FixedString512Bytes>
16.         , IEquatable<FixedString512Bytes>
17.         , IComparable<FixedString4096Bytes>
18.         , IEquatable<FixedString4096Bytes>
19.     {
20.         internal const ushort utf8MaxLengthInBytes = 29;
21.  
22.         [SerializeField] internal ushort utf8LengthInBytes;
23.         [SerializeField] internal FixedBytes30 bytes;
24.  
25.         /// <summary>
26.         /// Returns the maximum number of UTF-8 bytes that can be stored in this string.
27.         /// </summary>
28.         /// <returns>
29.         /// The maximum number of UTF-8 bytes that can be stored in this string.
30.         /// </returns>
31.         public static int UTF8MaxLengthInBytes => utf8MaxLengthInBytes;
32.  
33.         /// <summary>
34.         /// For internal use only. Use <see cref="ToString"/> instead.
35.         /// </summary>
36.         /// <value>For internal use only. Use <see cref="ToString"/> instead.</value>
37.         [CreateProperty]
38.         [System.ComponentModel.EditorBrowsable(System.ComponentModel.EditorBrowsableState.Never)]
39.         [ExcludeFromBurstCompatTesting("Returns managed string")]
40.         public string Value => ToString();
41.  
42. ...
43. }

So I think this is a bug from

Unity.Serialization

.

 

Can I replace the standard serialization adpter with my own one? I try to write my own adapter according to this thread: https://forum.unity.com/threads/how-to-de-serialize-an-object-containing-nativearrays.934200/
But not working, the adapter not even called.

 

I think maybe it is because of nested Fixed structs with structure like this

Code (CSharp):

1. public struct A {
2.     public FixedList4096Bytes<B> List;
3. }
4.  
5. public struct B {
6.     public int Index;
7.     public FixedString32Bytes Name;
8. }

Now I change

FixedList4096Bytes<B>

into

BlobArray<B>

, everything works perfectly for now.