From 91ff816839daf9099d117c95252f0da27963b27c Mon Sep 17 00:00:00 2001
From: Marco129 <marco.website01@gmail.com>
Date: Mon, 7 Mar 2016 14:14:28 +0800
Subject: [PATCH] Improve delete flow for non-existence _Join collection

---
 src/Schema.js | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/Schema.js b/src/Schema.js
index 0ed5552792..545b4953bf 100644
--- a/src/Schema.js
+++ b/src/Schema.js
@@ -409,10 +409,14 @@ class Schema {
 
             if (this.data[className][fieldName].startsWith('relation<')) {
               //For relations, drop the _Join table
-              return database.collectionExists(`_Join:${fieldName}:${className}`).then(exist => {
-                if (exist) {
-                  return database.dropCollection(`_Join:${fieldName}:${className}`);
+              return database.dropCollection(`_Join:${fieldName}:${className}`)
+              .then(() => {
+                return Promise.resolve();
+              }, error => {
+                if (error.message == 'ns not found') {
+                  return Promise.resolve();
                 }
+                return Promise.reject(error);
               });
             }