名将擂台：添加事务

shared/db/LadderMatch.ts

@@ -93,8 +93,13 @@ export default class LadderMatch extends BaseModel {
         return defense;
     }
 
-    public static async changeRank(isSuccess: boolean, attackInfo: LadderOppPlayerInfo, defenseInfo: LadderOppPlayerInfo) {
+    public static async changeRank(isSuccess: boolean, attackInfo: LadderOppPlayerInfo, defenseInfo: LadderOppPlayerInfo, times = 0) {
-        // TODO transaction
+        if(times > 10) return { isChange: false }
+        const session = await mongoose.connection.startSession();
+        session.startTransaction()
+
+        try {
+    
             let atkLadderMatch: LadderMatchType, defLadderMatch: LadderMatchType, isChange = false;
             if(defenseInfo.isRobot) {
                 atkLadderMatch = await LadderMatchModel.findOne({ roleId: attackInfo.roleId }).lean();
@@ -111,7 +116,13 @@ export default class LadderMatch extends BaseModel {
                     isChange = true;
                 }
             }
+            await session.commitTransaction()
             return { isChange, atkLadderMatch, defLadderMatch }
+        } catch(e) {
+            return await this.changeRank(isSuccess, attackInfo, defenseInfo, times + 1);
+        } finally {
+            session.endSession()
+        }
     }
 }