fix 合成藏宝图中的bug

shared/db/Item.ts

@@ -39,15 +39,17 @@ export default class Item extends BaseModel {
   }
 
   public static async decreaseItems(roleId: string, items: Array<{id: number, count: number}>, lean = true) {
-    let wrongItems = new Array<{id: number, count: number}>();
+    let updateItems = new Array<{id: number, count: number}>(), hasError: boolean = false;
     for(let {id, count} of items) {    
       const rec = await ItemModel.findOneAndUpdate({roleId, id, count: {$gte: count} },{ $inc: { count: -1 * count }}, {new: true}).lean(lean);
-      if(!rec) {
-        wrongItems.push({id, count}); break;
+      if(rec) {
+        updateItems.push({id, count});
+      } else {
+        hasError = true; break;
       }
     }
-    if(wrongItems.length > 0) { // 数量不足
-      for(let {id, count} of wrongItems) { 
+    if(hasError) { // 数量不足
+      for(let {id, count} of updateItems) { 
         await ItemModel.findOneAndUpdate({roleId, id },{ $inc: { count }}, {new: true}).lean(lean);
       } 
       return false