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ServerCommon/Doc/UserBase/ItemFirstPurchaseHistoryDoc.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+
+using Newtonsoft.Json;
+
+
+using ServerCore;
+using ServerBase;
+
+
+using META_ID = System.UInt32;
+using OWNER_GUID = System.String;
+
+
+
+namespace ServerCommon;
+
+public class ItemFirstPurchaseHistoryAttrib : AttribBase
+{
+    [JsonProperty("item_meta_id")]
+    public META_ID ItemMetaId { get; set; } = 0;
+
+    [JsonProperty("first_purchase_time")]
+    public DateTime FirstPurchaseTime { get; set; } = new();
+
+    public ItemFirstPurchaseHistoryAttrib()
+        : base(typeof(ItemFirstPurchaseHistoryAttrib).Name)
+    { }
+}
+
+//=============================================================================================
+// PK(Partition Key)                : "item_first_purchase_history#user_guid"
+// SK(Sort Key)                     : "item_meta_id"
+// DocType                          : ItemFirstPurchaseHistoryDoc
+// ItemFirstPurchaseHistoryAttrib   : {}
+// ...
+//=============================================================================================
+public class ItemFirstPurchaseHistoryDoc : DynamoDbDocBase
+{
+    private static string getPrefixOfPK() { return "item_first_purchase_history#"; }
+    private static string getPrefixOfSK() { return ""; }
+
+    public ItemFirstPurchaseHistoryDoc()
+        : base(typeof(ItemFirstPurchaseHistoryDoc).Name)
+    {
+        appendAttribWrapperAll();
+    }
+
+    public ItemFirstPurchaseHistoryDoc(string userGuid, META_ID socialActionMetaId)
+        : base(typeof(ItemFirstPurchaseHistoryDoc).Name)
+    {
+        setCombinationKeyForPK(userGuid);
+        setCombinationKeyForSK(socialActionMetaId.ToString());
+
+        appendAttribWrapperAll();
+
+        fillUpPrimaryKey(onMakePK(), onMakeSK());
+    }
+
+    private void appendAttribWrapperAll()
+    {
+        appendAttribWrapper(new AttribWrapper<ItemFirstPurchaseHistoryAttrib>());
+    }
+
+    protected override string onGetPrefixOfPK()
+    {
+        return getPrefixOfPK();
+    }
+
+    protected override ServerErrorCode onCheckAndSetSK(string sortKey)
+    {
+        getPrimaryKey().fillUpSK(sortKey);
+        setCombinationKeyForSK(sortKey);
+
+        return ServerErrorCode.Success;
+    }
+}