koobas.hobune.stream
Get asset file from scriptableobject (Nested Scriptableobjects)
Ok i think i found the issue: When OnEnable is called the actual asset isnt created, it is created AFTER OnEnable. So you cant nest Scriptable Objects into a scriptable after creating an container asset :/
EDIT1:Is it possible to get the asset file of an scriptable object in its OnEnable method?
ORIGINAL:Hi, im playing around with Scriptable Objects. But I'm running into multiple errors. Most of the code and examples i can find only are 2+ years old.
I was trying some basic thing, basicly a linked list: I have an mono behaviour holding a reference on a Container, which has a reference on a child (and each child has a child reference too, ...)
1st Try
[Serializable][CreateAssetMenu]
public class Container : ScriptableObject{
[SerializeField] public Child root; // Child derives from ScriptableObject
public void OnEnable() {
if (root == null) {
root = CreateInstance<Child>();
} } }
At this point i've run into my first error: type missmatch . Well I see why i happens: The Child instance is created but isn't saved anywhere (Maybe someone can explain it better than me).
2nd Try
But i want the childs to live inside this container, and not everyone getting an own file.
[Serializable][CreateAssetMenu]
public class Container : ScriptableObject{
[SerializeField] public Child root; // Child derives from ScriptableObject
public void OnEnable() {
if (root == null) {
root = CreateInstance<Child>();
AssetDatabase.AddObjectToAsset(root, this);
AssetDatabase.SaveAssets();
} } }
Now I've got the error:
AddAssetToSameFile failed because the other asset is not persistent
I've googled for that error, but this error seems to be rare :/
So, how would one do something like that?
Scriptable objects needs to be saved to file to be persistent. You do this through AssetDatabase.CreateAsset. So you want:
if (root == null) {
root = CreateInstance<Child>();
AssetDatabase.CreateAsset(child, "Path_To_Object");
... //as before
}
what is child? did you mean root? If so: this solution does not work.
To create the container as asset file i use the [CreateAsset$$anonymous$$enu] attribute. Why do i need CreateAsset? the asset file exists, which is the reason OnEnable is called.
and i want to add the root object to this existing asset file. Based on the documention it should not be necessary to create the subasset with createAsset
late to the party but i had the same issue and there is a relatively simple solution - search for the path of your object and check whether it's null or empty:
[Serializable][CreateAssetMenu]
public class Container : ScriptableObject
{
[SerializeField]
public Child root;
public void OnEnable()
{
var path = AssetDatabase.GetAssetPath(this);
if (string.IsNullOrEmpty(path))
{ return; }
if (root == null)
{
root = CreateInstance<Child>();
AssetDatabase.AddObjectToAsset(root, this);
AssetDatabase.SaveAssets();
}
}
}
