diff --git a/src/decorators/nojson.ts b/src/decorators/nojson.ts
index 8d49fb1..e4c5518 100644
--- a/src/decorators/nojson.ts
+++ b/src/decorators/nojson.ts
@@ -1,18 +1,32 @@
 import 'reflect-metadata'
+import { singleton } from './singleton'
 
 const noJsonMetadataKey = ('noJsonSet')
 
+@singleton
+export class NoJsonClass {
+  private noJsonPropSet: Set<string> = new Set()
+
+  public addKey(className: string, propertyKey: string) {
+    this.noJsonPropSet.add(className+'_'+propertyKey)
+  }
+
+  public checkExist(className: string, propertyKey: string) {
+    return this.noJsonPropSet.has(className+'_'+propertyKey)
+  }
+}
 /**
- * 这方法无效
  * 在不需要toJson方法输出的字段上加上 @noJson
  * @return {{(target: Function): void, (target: Object, propertyKey: (string | symbol)): void}}
  */
 export function noJson() {
-  return Reflect.metadata(noJsonMetadataKey, !0)
+  // return Reflect.metadata(noJsonMetadataKey, !0)
+  return function(target: Object, propertyKey: string) {
+    console.log(target)
+    new NoJsonClass().addKey(target.constructor.name, propertyKey)
+  }
 }
 
 export function checkJson(target: any, propertyKey: string) {
-  let val = Reflect.getMetadata(noJsonMetadataKey, target, propertyKey)
-  let s = Reflect.getMetadata('typegoose:properties', target, propertyKey)
-  return !val
+  return !new NoJsonClass().checkExist(target.constructor.modelName, propertyKey)
 }
diff --git a/src/models/Base.ts b/src/models/Base.ts
index e57640b..58a11a0 100644
--- a/src/models/Base.ts
+++ b/src/models/Base.ts
@@ -28,7 +28,7 @@ export abstract class BaseModule extends FindOrCreate {
     let result: any = {}
     // @ts-ignore
     for (let key in this._doc) {
-      if (jsonExcludeKeys.indexOf(key) == -1) {
+      if (checkJson(this, key+'' ) && jsonExcludeKeys.indexOf(key) == -1) {
         result[key] = this[key]
       }
     }
diff --git a/src/models/content/Puzzle.ts b/src/models/content/Puzzle.ts
index 6d21ab4..14eb80e 100644
--- a/src/models/content/Puzzle.ts
+++ b/src/models/content/Puzzle.ts
@@ -13,7 +13,6 @@ import { noJson } from '../../decorators/nojson'
 class PuzzleClass extends BaseModule {
   @prop()
   public question: string
-
   @prop()
   public a1: string
   @prop()