fix: align backend APIs and upload flow

2026-09-15 14:10:55 +08:00
parent 32177a7293
commit 53e6195938
149 changed files with 4791 additions and 435 deletions
@@ -0,0 +1,81 @@
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace MessageService.Infrastructure.Migrations
+{
+    [DbContext(typeof(MessageDbContext))]
+    [Migration("20260911000100_ConversationUniqueness")]
+    public partial class ConversationUniqueness : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.Sql("""
+                CREATE TEMPORARY TABLE `conversation_dedup` AS
+                SELECT
+                    `Id`,
+                    ROW_NUMBER() OVER (
+                        PARTITION BY `UserId`, `ChatType`, `TargetId`
+                        ORDER BY COALESCE(`ModificationTime`, `CreationTime`) DESC, `Id` DESC
+                    ) AS `row_num`,
+                    MAX(`UnreadCount`) OVER (
+                        PARTITION BY `UserId`, `ChatType`, `TargetId`
+                    ) AS `max_unread_count`,
+                    MAX(`LastReadSequenceId`) OVER (
+                        PARTITION BY `UserId`, `ChatType`, `TargetId`
+                    ) AS `max_last_read_sequence_id`
+                FROM `conversations`
+                WHERE `IsDeleted` = 0;
+                """);
+
+            migrationBuilder.Sql("""
+                UPDATE `conversations` AS `conversation`
+                INNER JOIN `conversation_dedup` AS `dedup` ON `conversation`.`Id` = `dedup`.`Id`
+                SET
+                    `conversation`.`UnreadCount` = CASE
+                        WHEN `dedup`.`row_num` = 1 THEN `dedup`.`max_unread_count`
+                        ELSE `conversation`.`UnreadCount`
+                    END,
+                    `conversation`.`LastReadSequenceId` = CASE
+                        WHEN `dedup`.`row_num` = 1 THEN `dedup`.`max_last_read_sequence_id`
+                        ELSE `conversation`.`LastReadSequenceId`
+                    END,
+                    `conversation`.`IsDeleted` = CASE
+                        WHEN `dedup`.`row_num` = 1 THEN `conversation`.`IsDeleted`
+                        ELSE 1
+                    END,
+                    `conversation`.`Deletion` = CASE
+                        WHEN `dedup`.`row_num` = 1 THEN `conversation`.`Deletion`
+                        ELSE CURRENT_TIMESTAMP(6)
+                    END;
+                """);
+
+            migrationBuilder.Sql("DROP TEMPORARY TABLE `conversation_dedup`;");
+
+            migrationBuilder.AddColumn<string>(
+                name: "ActiveConversationKey",
+                table: "conversations",
+                type: "varchar(96)",
+                maxLength: 96,
+                nullable: true,
+                computedColumnSql: "CASE WHEN `IsDeleted` = 0 THEN CONCAT(`UserId`, ':', `ChatType`, ':', `TargetId`) ELSE NULL END",
+                stored: true);
+
+            migrationBuilder.CreateIndex(
+                name: "UX_conversations_ActiveConversationKey",
+                table: "conversations",
+                column: "ActiveConversationKey",
+                unique: true);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "UX_conversations_ActiveConversationKey",
+                table: "conversations");
+
+            migrationBuilder.DropColumn(
+                name: "ActiveConversationKey",
+                table: "conversations");
+        }
+    }
+}