Fixed error calling length of undefined

chaitanya-bhagavan · chaitanya-bhagavan · commit 80133de83167 · 2016-11-17T12:30:32.000+05:30
diff --git a/lib/modules/database.js b/lib/modules/database.js
@@ -232,7 +232,7 @@ class DatabaseRef extends ReferenceBase {
     const path = this.dbPath();
     return this.db.off(path, evt, origCB)
       .then(({callback, subscriptions}) => {
-        if (dbSubscriptions[path] && dbSubscriptions[path][evt].length > 0) {
+        if (dbSubscriptions[path] && dbSubscriptions[path][evt] && dbSubscriptions[path][evt].length > 0) {
           return subscriptions;
         }
 

Original file line number	Diff line number	Diff line change
`@@ -232,7 +232,7 @@ class DatabaseRef extends ReferenceBase {`
`232`	`232`	`const path = this.dbPath();`
`233`	`233`	`return this.db.off(path, evt, origCB)`
`234`	`234`	`.then(({callback, subscriptions}) => {`
`235`		`- if (dbSubscriptions[path] && dbSubscriptions[path][evt].length > 0) {`
	`235`	`+ if (dbSubscriptions[path] && dbSubscriptions[path][evt] && dbSubscriptions[path][evt].length > 0) {`
`236`	`236`	`return subscriptions;`
`237`	`237`	`}`
`238`	`238`