diff --git a/.gitignore b/.gitignore
index 4f20167..325db43 100644
--- a/.gitignore
+++ b/.gitignore
@@ -89,3 +89,22 @@ fastlane/test_output
 
 iOSInjectionProject/
 .DS_Store
+
+
+# Swift Package Manager
+/.build
+/Packages
+Package.resolved
+
+# 如果你用 Xcode 打开 Package.swift，会生成 .swiftpm
+.swiftpm/xcode
+
+# Playground 支持
+timeline.xctimeline
+playground.xcworkspace
+
+# SwiftPM artifact cache (Swift 5.8+，如果用到了 binary target)
+.artifacts
+
+# Xcode Preview snapshots
+*.preview-thumbnails
diff --git a/Sources/SmartCodable/Core/JSONEncoder/EncodingCache.swift b/Sources/SmartCodable/Core/JSONEncoder/EncodingCache.swift
index 6e9b564..4bf2ece 100644
--- a/Sources/SmartCodable/Core/JSONEncoder/EncodingCache.swift
+++ b/Sources/SmartCodable/Core/JSONEncoder/EncodingCache.swift
@@ -20,6 +20,7 @@ class EncodingCache: Cachable {
             
             var snapshot = EncodingSnapshot()
             snapshot.objectType = object
+            snapshot.codingPath = codingPath
             snapshot.transformers = object.mappingForValue()
             snapshots.append(snapshot)
         }
diff --git a/Sources/SmartCodable/Core/JSONEncoder/Impl/_SpecialTreatmentEncoder.swift b/Sources/SmartCodable/Core/JSONEncoder/Impl/_SpecialTreatmentEncoder.swift
index 4b64ed4..f5f8d1a 100644
--- a/Sources/SmartCodable/Core/JSONEncoder/Impl/_SpecialTreatmentEncoder.swift
+++ b/Sources/SmartCodable/Core/JSONEncoder/Impl/_SpecialTreatmentEncoder.swift
@@ -67,11 +67,10 @@ extension _SpecialTreatmentEncoder {
             return try self.wrapObject(object as! [String: Encodable], for: additionalKey)
         default:
             
-            impl.cache.cacheSnapshot(for: E.self, codingPath: codingPath)
-            
             let encoder = self.getEncoder(for: additionalKey)
+            encoder.cache.cacheSnapshot(for: E.self, codingPath: encoder.codingPath)
             try encodable.encode(to: encoder)
-            impl.cache.removeSnapshot(for: E.self)
+            encoder.cache.removeSnapshot(for: E.self)
 
             // If it is modified by SmartFlat, you need to encode to the upper layer to restore the data.
             if encodable is FlatType {
diff --git a/Tests/Example.swift b/Tests/Example.swift
index 56bae76..ef50020 100644
--- a/Tests/Example.swift
+++ b/Tests/Example.swift
@@ -1,4 +1,6 @@
 import XCTest
+import SmartCodableInherit
+import Foundation
 @testable import SmartCodable
 
 
@@ -33,8 +35,36 @@ class Tests: XCTestCase {
         
     }
     
+    
+    func testJSONEncode() {
+        var dic: [String: Any] = [
+            "id": 563,
+            "owner_id": 264,
+            "title": "langwang004+82 ワークスペース",
+            "icon": "",
+            "type": 2,
+            "used_seat": 1,
+            "created_at": "2025-07-25T02:58:35Z",
+        ]
+        
+        let subscription: [String: Any] = [
+            "cancel_at_period_end": true,
+            "current_period_end_at": "2025-07-30T03:37:03Z",
+            "price_id": "personal_plan_annual_trial",
+            "status": "past_due"
+        ]
+        dic["subscription"] = subscription as any Equatable
+        
+        let model = WorkspaceModel.deserialize(from: dic)
+        XCTAssertNotNil(model)
+        let modelDic = model?.toDictionary(useMappedKeys: true)
+        XCTAssertNotNil(modelDic)
+        let res = deepEqualDict(dic, modelDic!)
+        XCTAssertTrue(res)
+    }
 }
 
+
 // SmartCodable
 struct Smart: SmartCodable {
     var name: String?
@@ -66,3 +96,94 @@ class SubModel: BaseModel {
         return "我的名字是\(self.name)"
     }()
 }
+
+// MARK: - Test JSON Encode
+func deepEqual(_ lhs: Any, _ rhs: Any) -> Bool {
+    switch (lhs, rhs) {
+    case let (a as Int, b as Int): return a == b
+    case let (a as Double, b as Double): return a == b
+    case let (a as String, b as String): return a == b
+    case let (a as Bool, b as Bool): return a == b
+    case let (a as [String: Any], b as [String: Any]):
+        return deepEqualDict(a, b)
+    case let (a as [Any], b as [Any]):
+        return deepEqualArray(a, b)
+    case let (a as NSNumber, b as NSNumber):
+        return a == b
+    case (is NSNull, is NSNull):
+        return true
+    default:
+        return false
+    }
+}
+
+func deepEqualDict(_ lhs: [String: Any], _ rhs: [String: Any]) -> Bool {
+    guard lhs.count == rhs.count else { return false }
+    for (key, lValue) in lhs {
+        print("compare key: \(key), lValue: \(lValue)")
+        guard let rValue = rhs[key] else {
+            print("not found rValue for key: \(key), in rhs: \(rhs)")
+            return false
+        }
+        if !deepEqual(lValue, rValue) {
+            print("lValue: \(lValue) not equal to rValue: \(rValue)")
+            return false
+        }
+    }
+    print("key value equal in both")
+    return true
+}
+
+func deepEqualArray(_ lhs: [Any], _ rhs: [Any]) -> Bool {
+    guard lhs.count == rhs.count else { return false }
+    for (l, r) in zip(lhs, rhs) {
+        if !deepEqual(l, r) {
+            return false
+        }
+    }
+    return true
+}
+
+open class SCRootModel {
+    
+    required public init() { }
+    
+    open func didFinishMapping() {
+        
+    }
+    
+    open class func mappingForKey() -> [SmartKeyTransformer]? {
+        nil
+    }
+    
+    open class func mappingForValue() -> [SmartValueTransformer]? {
+        nil
+    }
+}
+
+
+class WorkspaceModel: SCRootModel, SmartCodable {
+    var id: Int = 0
+    var owner_id: Int = 0
+    var title: String = ""
+    var icon: String = ""
+    var type: Int = 0
+    var used_seat: Int = 0
+    var created_at: String = ""
+    var subscription: WorkspaceSubscription?
+}
+
+class WorkspaceSubscription: SCRootModel, SmartCodable {
+    var cancelAtPeriodEnd: Bool = false
+    var currentPeriodEndAt: String = ""
+    var priceid: String = ""
+    var status: String = ""
+    
+    override class func mappingForKey() -> [SmartKeyTransformer]? {
+        [
+            CodingKeys.cancelAtPeriodEnd <--- "cancel_at_period_end",
+            CodingKeys.currentPeriodEndAt <--- "current_period_end_at",
+            CodingKeys.priceid <--- "price_id",
+        ]
+    }
+}