From b4cdf4899a54586d7dc23616240397b19cd15b78 Mon Sep 17 00:00:00 2001
From: Julian Krauser <jkrauser209@gmail.com>
Date: Thu, 19 Dec 2024 10:32:28 +0100
Subject: [PATCH] prevent duplicate table names by depth

---
 src/helpers/dynamicQueryBuilder.ts | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/helpers/dynamicQueryBuilder.ts b/src/helpers/dynamicQueryBuilder.ts
index ad0ba7b..437fd9c 100644
--- a/src/helpers/dynamicQueryBuilder.ts
+++ b/src/helpers/dynamicQueryBuilder.ts
@@ -55,9 +55,10 @@ export default abstract class DynamicQueryBuilder {
     offset: number = 0,
     count: number = 25
   ): SelectQueryBuilder<ObjectLiteral> {
-    let query = dataSource.getRepository(queryObj.table).createQueryBuilder(queryObj.table + "_0");
+    let affix = Math.random().toString(36).substring(2);
+    let query = dataSource.getRepository(queryObj.table).createQueryBuilder(`${queryObj.table}_${affix}`);
 
-    this.buildDynamicQuery(query, queryObj);
+    this.buildDynamicQuery(query, queryObj, affix);
 
     query.offset(offset);
     query.limit(count);
@@ -68,9 +69,10 @@ export default abstract class DynamicQueryBuilder {
   private static buildDynamicQuery(
     query: SelectQueryBuilder<ObjectLiteral>,
     queryObject: DynamicQueryStructure,
+    affix: string = "",
     depth: number = 0
   ): void {
-    const alias = queryObject.table + "_" + depth;
+    const alias = queryObject.table + "_" + affix;
     let firstSelect = true;
     let selects: Array<string> = [];
 
@@ -97,9 +99,10 @@ export default abstract class DynamicQueryBuilder {
 
     if (queryObject.join) {
       for (const join of queryObject.join) {
-        query.leftJoinAndSelect(`${alias}.${join.foreignColumn}`, join.table + "_" + (depth + 1));
+        let subaffix = Math.random().toString(36).substring(2);
+        query.leftJoinAndSelect(`${alias}.${join.foreignColumn}`, join.table + "_" + subaffix);
 
-        this.buildDynamicQuery(query, join, depth + 1);
+        this.buildDynamicQuery(query, join, subaffix, depth + 1);
       }
     }