Force reimport ScriptableObject

Question

Hello!

I am trying to change C# Script of ScriptableObject and then fill newly created fields on an instance of that ScriptableObject. Earlier I've been trying to use Reflections or SerializedProperty to fill these fields on object but the new fields were null, so I've changed my attempt to manualy fill the .asset file using YAML, it's slightly better. Does not cause errors (how would it?) but in my ScriptableObject the newly added fields have null values until i restart Unity. I've tried multiple different attempts, including using attaching to assembliesCompiled event, using Assets Postprocessor, but each time I got the same result. Does anyone know how should I solve it? I suppose I need to force Unity to unload ScriptableObject and parse it from YAML again, but I have not found a way to do that.

My code looks like that (this version is stripped):

 void DoYourJob()
 {
     string filePath = Application.dataPath + "/Scripts/ExampleScriptableObject.cs";
     FileStream fileStream;
     fileStream = File.Open( filePath, FileMode.OpenOrCreate );
     fileStream.SetLength( 0 );
     fileStream.Flush();

     StreamWriter streamWriter = new StreamWriter(fileStream);

     streamWriter.WriteLine( "using UnityEngine;" );
     streamWriter.WriteLine( "" );
     streamWriter.WriteLine( "public class ExampleScriptableObject : ScriptableObject {" );
     //Writing other fields here
     [...]
     //Creating an example field
     streamWriter.WriteLine( "public ScriptableObject anObject;" );
     streamWriter.WriteLine( "}" );
     streamWriter.Dispose();
     fileStream.Dispose();

     AssetDatabase.ImportAsset( filePath, ImportAssetOptions.ForceUpdate );

     string path = AssetDatabase.GUIDToAssetPath(AssetDatabase.FindAssets("t:ExampleScriptableObject")[0]);
     fileStream = File.Open( path, FileMode.Create );
     fileStream.SetLength( 0 );
     fileStream.Flush();

     streamWriter = new StreamWriter( fileStream );
     //Writing YAML header and other fields here
     [...]

     //Setting any asset (the guid is correct) to newly created example field
     streamWriter.WriteLine( "  anObject: {fileID: 11400000, guid: " + someScriptableObjectGuid + ", type: 2}");
     streamWriter.Dispose();
     fileStream.Dispose();        
     AssetDatabase.ImportAsset(path, ImportAssetOptions.ForceUpdate);
 }

Answer 1

 #if UNITY_EDITOR
 using System.IO;
 using System.Linq;
 using UnityEngine;
 using UnityEditor;
 
 using NaughtyAttributes;
 
 public class CodeGen : MonoBehaviour
 {
     [SerializeField] Object _anObject = null;
 
     void Start () => DoYourJob();
 
     [Button("Do Your Job")]
     void DoYourJob ()
     {
         string className = "ExampleScriptableObject";
         string scriptFileAbsPath = Path.Combine( Application.dataPath , $"Scripts/{className}.cs" );
         using( var stream = File.Open( scriptFileAbsPath , FileMode.OpenOrCreate ) )
         {
             stream.SetLength(0);
             stream.Flush();
             using( var writer = new StreamWriter(stream) )
             {
                 writer.WriteLine( "using UnityEngine;" );
                 writer.WriteLine( "" );
                 writer.WriteLine( $"[CreateAssetMenu( menuName=\"{this.GetType().Name}/{className}\" , order=0 )]" );
                 writer.WriteLine( $"public class {className} : ScriptableObject {{" );
                 // Writing other fields here
                 {
 
                 }
                 // Creating an example field
                 writer.WriteLine( $"\tpublic Object {nameof(_anObject)};" );
                 writer.WriteLine( "}" );
             }
         }
         string scriptFileAssetPath = $"Assets/Scripts/{className}.cs";
         AssetDatabase.ImportAsset( scriptFileAssetPath , ImportAssetOptions.ForceUpdate );
         string scriptFileGuid = AssetDatabase.AssetPathToGUID( scriptFileAssetPath );
 
         string objectAssetGuid = AssetDatabase.FindAssets( $"t:{className}").FirstOrDefault();
         string assetGuid = AssetDatabase.FindAssets( $"t:{className}").FirstOrDefault();
         string assetPath = AssetDatabase.GUIDToAssetPath( objectAssetGuid );
         if( string.IsNullOrEmpty(assetPath) )
         {
             Debug.Log($"asset instance t:{className} not found, create one first");
             return;
         }
         
         using( var stream = File.Open(assetPath,FileMode.Create) )
         {
             stream.SetLength(0);
             stream.Flush();
             using( var writer = new StreamWriter( stream ) )
             {
                 // Writing YAML header and other fields here
                 {
                     writer.WriteLine("%YAML 1.1");
                     writer.WriteLine("%TAG !u! tag:unity3d.com,2011:");
                     writer.WriteLine("--- !u!114 &11400000");
                     writer.WriteLine("MonoBehaviour:");
                     writer.WriteLine("  m_ObjectHideFlags: 0");
                     writer.WriteLine("  m_CorrespondingSourceObject: {fileID: 0}");
                     writer.WriteLine("  m_PrefabInstance: {fileID: 0}");
                     writer.WriteLine("  m_PrefabAsset: {fileID: 0}");
                     writer.WriteLine("  m_GameObject: {fileID: 0}");
                     writer.WriteLine("  m_Enabled: 1");
                     writer.WriteLine("  m_EditorHideFlags: 0");
                     writer.WriteLine($"  m_Script: {{fileID: 11500000, guid: {scriptFileGuid}, type: 3}}");
                     writer.WriteLine("  m_Name: New Example Scriptable Object");
                     writer.WriteLine("  m_EditorClassIdentifier:");
                 }
                 // Setting any asset (the guid is correct) to newly created example field
                 if( AssetDatabase.TryGetGUIDAndLocalFileIdentifier( _anObject , out string targetGuid , out long targetLocalId ) )
                     writer.WriteLine( $"  {nameof(_anObject)}: {{fileID: {targetLocalId}, guid: {targetGuid}, type: 2}}");
             }
         }
 
         AssetDatabase.ImportAsset( assetPath , ImportAssetOptions.ForceUpdate );
     }
 }
 #endif

For NaughtyAttributes install https://github.com/dbrizov/NaughtyAttributes.git#upm package

Force reimport ScriptableObject

1 Reply

Your answer

Follow this Question

Related Questions