fix gen code without newton json

Assets/HuaweiService/Editor/cloud_db/ClassTemplate.cs

 
 namespace HuaweiService.CloudDB.Editor {
     public class ClassTemplate {
-        public Permissions[] permissions;
-        public ObjectType[] objectTypes;
+        public System.Collections.Generic.List<Permissions> permissions;
+        public System.Collections.Generic.List<ObjectType> objectTypes;
+    [Serializable]
-        public PermissionInfo[] infos;
+        public System.Collections.Generic.List<PermissionInfo> permissions;
+    [Serializable]
+    [Serializable]
-        public Field[] fields;
+        public System.Collections.Generic.List<Field> fields;
+    [Serializable]
     public class Field {
         public bool isNeedEncrypt;
         public string fieldName;

Assets/HuaweiService/Editor/cloud_db/GenCode.cs

 
         public void GenerateModels (ObjectType objectType) {
             string objectTypeName = objectType.objectTypeName;
-            Field[] fields = objectType.fields;
+            Field[] fields = objectType.fields.ToArray();
 
             string path = ExportFileDir + $"/{objectTypeName}.cs";
             Debug.LogFormat ("Generating Class: {0}.", objectTypeName);