snapshot.hasChild(path) now supports deep checks i.e snapshot.hasChild('foo/bar/baz')

Author: Salakar

lib/modules/database/snapshot.js

@@ -2,7 +2,7 @@
  * @flow
  */
 import Reference from './reference.js';
-import { isObject, deepGet } from './../../utils';
+import { isObject, deepGet, deepExists } from './../../utils';
 
 export default class Snapshot {
   static key: String;
@@ -26,6 +26,7 @@ export default class Snapshot {
     this.priority = snapshot.priority === undefined ? null : snapshot.priority;
     this.childKeys = snapshot.childKeys || [];
   }
+
   /*
    * DEFAULT API METHODS
    */
@@ -50,15 +51,15 @@ export default class Snapshot {
   }
 
   forEach(fn: (key: any) => any) {
-    (this.childKeys || []).forEach((key, i) => fn(this.value[key], i));
+    return this.childKeys.forEach((key, i) => fn(this.value[key], i));
   }
 
   getPriority() {
     return this.priority;
   }
 
-  hasChild(key: string) {
-    return this.childKeys.includes(key);
+  hasChild(path: string) {
+    return deepExists(this.value, path);
   }
 
   hasChildren() {