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ServerCommon/Doc/OwnerContents/CartDoc.cs

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+using Newtonsoft.Json;
+
+
+using ServerCore;
+using ServerBase;
+
+
+using META_ID = System.UInt32;
+
+
+namespace ServerCommon;
+
+public class CartAttrib : AttribBase
+{
+    [JsonProperty("cart_items")]
+    public Dictionary<CurrencyType, Dictionary<META_ID/*ItemMetaID*/, Int32/*Count*/>> CartItems { get; set; } = new();
+
+    public CartAttrib()
+        : base(typeof(CartAttrib).Name)
+    { }
+}
+
+//=============================================================================================
+// PK(Partition Key)    : "cart#user_guid"
+// SK(Sort Key)         : ""
+// DocType              : CartDoc
+// CartAttrib           : {}
+// ...
+//=============================================================================================
+public class CartDoc : DynamoDbDocBase
+{
+    private static string getPrefixOfPK() { return "cart#"; }
+
+    public CartDoc()
+        : base(typeof(CartDoc).Name)
+    {
+        appendAttribWrapperAll();
+    }
+
+    public CartDoc(string ownerGuid)
+        : base(typeof(CartDoc).Name)
+    {
+        setCombinationKeyForPK(ownerGuid);
+
+        appendAttribWrapperAll();
+
+        fillUpPrimaryKey(onMakePK(), onMakeSK());
+
+        setExceptionHandler(new DynamoDbQueryExceptionNotifier.ExceptionHandler(DynamoDbQueryExceptionNotifier.ConditionalCheckFailed, ServerErrorCode.CartDocException));
+    }
+
+    private void appendAttribWrapperAll()
+    {
+        appendAttribWrapper(new AttribWrapper<CartAttrib>());
+    }
+
+    protected override string onGetPrefixOfPK()
+    {
+        return getPrefixOfPK();
+    }
+}