Bug Spline field in a nested class throws exception in inspector.

If you have a Spline field in a class that is a field of a MonoBehaviour, the inspector will throw exceptions when trying to view the contents of the Spline field.

Code (CSharp):

1. public class SplineExample : MonoBehaviour
2. {
3.     [SerializeField] private SplineHolder _splineHolder;
4. }
5.  
6. [System.Serializable]
7. public class SplineHolder
8. {
9.     [SerializeField] private Spline _spline;
10. }

The reason for this is because you are using a naïve implementation to get the Spline value from a SerializedProperty and directly using the property path to get the field info and passing the SerializedObject's target as the object for the GetField(..).

What you need to do is split up the path and walk over the whole thing getting each field along the way and using the value from the previous field to get the value of the next. I have a implementation myself that supports both arrays/lists and SerializeReference if you want to take a look at it.
Github Repo (MIT)

Case 1410152

 

pinging @gabrielw_unity, as his team works on the Spline tools.