[Unity]ScriptableObjectの変更が再起動時にリセットされる

Question

前提・実現したいこと

UnityのScriptableObjectにて、インスペクタ上からの変更が再起動時にリセット(文字列は空文字列、intは0)されてしまいます。調べたところ、変更をEditorUtility.SetDirty()、AssetDatabase.SaveAssets()を使って保存する必要があるとあったので試しましたが保存されません。

該当のソースコード

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
using UnityEngine.Events;
#if UNITY_EDITOR
using UnityEditor;
#endif

[CreateAssetMenu(menuName = "MyScriptable/Create WeaponData")]
public class WeaponDataStatic : ScriptableObject
{
	[HideInInspector] private string m_weaponName;
	[HideInInspector] private WeaponTypeEnum m_type;
	[HideInInspector] private int m_attack;
	[HideInInspector] private int m_defense;
	[HideInInspector] private int m_maxHealth;
	[HideInInspector] private int m_critical;
	[HideInInspector] private bool m_designatedSub;
	[HideInInspector] private WeaponSkillActive m_activeSkill;
	[HideInInspector] private WeaponSkillPassive m_passiveSkill;

	//public WeaponDataStatic data = new WeaponDataStatic();

	public string weaponName { get { return m_weaponName; } }
	public WeaponTypeEnum type { get { return m_type; } }
	public int attack { get { return m_attack; } }
	public int defense { get { return m_defense; } }
	public int maxHealth { get { return m_maxHealth; } }
	public int critical { get { return m_critical; } }
	public bool designatedSub { get { return m_designatedSub; } }
	public WeaponSkillActive activeSkill { get { return m_activeSkill; } }
	public WeaponSkillPassive passiveSkill { get { return m_passiveSkill; } }

#if UNITY_EDITOR
	[CustomEditor(typeof(WeaponDataStatic))]
	public class WeaponDataEditor : Editor
	{
		public override void OnInspectorGUI()
		{
			base.OnInspectorGUI();

			WeaponDataStatic data = target as WeaponDataStatic;

			data.m_weaponName = EditorGUILayout.TextField("Name", data.weaponName);
			data.m_type = (WeaponTypeEnum)EditorGUILayout.EnumPopup("Type", data.type);
			data.m_attack = EditorGUILayout.IntField("Attack", data.attack);
			data.m_defense = EditorGUILayout.IntField("Defense", data.defense);
			data.m_maxHealth = EditorGUILayout.IntField("Max Health", data.maxHealth);
			data.m_critical = EditorGUILayout.IntField("Critical", data.critical);
			data.m_designatedSub = EditorGUILayout.Toggle("Designated Sub", data.designatedSub);

			data.m_activeSkill = (WeaponSkillActive)EditorGUILayout.ObjectField("Active Skill", data.activeSkill, typeof(WeaponSkillActive), false);
			if (data.activeSkill)
			{
				EditorGUI.indentLevel++;
				EditorGUI.BeginDisabledGroup(true);
				EditorGUILayout.TextField("Active Skill Name", data.activeSkill.activeSkillName);
				EditorGUILayout.TextField("Cool Time", data.activeSkill.coolTime.ToString());
				EditorGUI.EndDisabledGroup();
				EditorGUI.indentLevel--;
			}
			data.m_passiveSkill = (WeaponSkillPassive)EditorGUILayout.ObjectField("Passive Skill", data.passiveSkill, typeof(WeaponSkillPassive), false);
			if (data.passiveSkill)
			{
				EditorGUI.indentLevel++;
				EditorGUI.BeginDisabledGroup(true);
				EditorGUILayout.TextField("Passive Skill Name", data.passiveSkill.passiveSkillName);
				EditorGUI.EndDisabledGroup();
				EditorGUI.indentLevel--;
			}

			EditorUtility.SetDirty(data);
			AssetDatabase.SaveAssets();
		}
	}
#endif
}

Answer 1

ご提示のコードだとフィールド類が全部シリアライズ対象外になってしまっているんじゃないでしょうか?
フィールドに付けている属性を[HideInInspector]から[HideInInspector, SerializeField]に変更してみるとどうでしょう。