Fix Unity 5.5 Downgrading to 5.4 missing GameObject name, activeSelf.

Fix55To54.cs

using UnityEngine;
using UnityEditor;
using System.IO;
using System.Collections.Generic;

public class Fix55To54 {

	[System.SerializableAttribute]
	public class GameObjectData {
		public bool activeSelf;
		public string name;

		public void SetData (GameObject go, object dataObj) {
			go.SetActive (this.activeSelf);
			go.name = this.name;
			List<object> childsList = (dataObj as Dictionary<string, object>)["childs"] as List<object>;
			for (int i = 0; i < childsList.Count; i++) {
				Dictionary<string, object> childDict = childsList[i] as Dictionary<string, object>;
				GameObjectData childData = JsonUtility.FromJson<GameObjectData> (MiniJSON.Json.Serialize (childDict));
				Transform child = go.transform.GetChild (i);
				childData.SetData (child.gameObject, childDict);
			}
		}
	}

	public static string path = "Assets/prefab_datas.json";

	[MenuItem ("Fix55To54/Read")]
	public static void Read () {
		string json = File.ReadAllText (path);
		Debug.Log (json);
		Dictionary<string, object> data = MiniJSON.Json.Deserialize (json) as Dictionary<string, object>;
		foreach (var goDataDict in data) {
			GameObject go = AssetDatabase.LoadAssetAtPath<GameObject> (goDataDict.Key);
			if (go == null) {
				Debug.LogWarning (goDataDict.Key);
				continue;
			}
			Debug.Log (goDataDict.Key);
			GameObjectData goData = JsonUtility.FromJson<GameObjectData> (MiniJSON.Json.Serialize (goDataDict.Value));
			goData.SetData (go, goDataDict.Value);
		}
		AssetDatabase.SaveAssets ();
		AssetDatabase.Refresh ();
	}
	[MenuItem ("Fix55To54/Write")]
	public static void Write () {
		Dictionary<string, object> data = new Dictionary<string, object> ();
		foreach (string assetGuid in AssetDatabase.FindAssets("t:prefab")) {
			string assetPath = AssetDatabase.GUIDToAssetPath(assetGuid);
			GameObject go = AssetDatabase.LoadAssetAtPath<GameObject> (assetPath);
			data[assetPath] = GetGameObjectData (go);
		}
		string json = MiniJSON.Json.Serialize (data);

		FileInfo file = new FileInfo (path);
		if (!file.Directory.Exists) {
			file.Directory.Create ();
		}
		if (!file.Exists) {
			file.Create ();
		}
		File.WriteAllText (path, json);
	}
	
	private static Dictionary<string, object> GetGameObjectData (GameObject go) {
		List<object> childs = new List<object> ();
		for (int i = 0; i < go.transform.childCount; i++) {
			Transform child = go.transform.GetChild (i);
			childs.Add (GetGameObjectData (child.gameObject));
		}
		Dictionary<string, object> data = new Dictionary<string, object> () {
			{ "name", go.name },
			{ "activeSelf", go.activeSelf },
			{ "childs", childs },
		};
		return data;
	}
}

Required:

• MiniJson

Use:

1. Create prefab_datas.json file on Assets/
2. Open project with Unity 5.5
3. Click Fix55To54/Write on menu
4. Close Unity 5.5
5. Open project with Unity 5.4
6. Click Fix55To54/Read on menu
7. Delete prefab_datas.json