[both][database] Fixed an issue where the reference from a child snapshot was being returned as the parent snapshot when listening to child events

lib/modules/database/reference.js

@@ -262,13 +262,11 @@ export default class Reference extends ReferenceBase {
     if (_failureCallback) {
       _failureCallback = (error) => {
         if (error.message.startsWith('FirebaseError: permission_denied')) {
-
-          error.message = `permission_denied at /${this.path}: Client doesn\'t have permission to access the desired data.`
+          error.message = `permission_denied at /${this.path}: Client doesn't have permission to access the desired data.`
         }
 
         failureCallbackOrContext(error);
-
-      }
+      };
     }
 
     let _successCallback;
@@ -375,11 +373,9 @@ export default class Reference extends ReferenceBase {
    * @param onComplete
    * @param applyLocally
    */
-  transaction(
-    transactionUpdate: Function,
+  transaction(transactionUpdate: Function,
               onComplete: (error: ?Error, committed: boolean, snapshot: ?Snapshot) => *,
-    applyLocally: boolean = false
-  ) {
+              applyLocally: boolean = false) {
     if (!isFunction(transactionUpdate)) {
       return Promise.reject(
         new Error('Missing transactionUpdate function argument.')
@@ -588,7 +584,7 @@ export default class Reference extends ReferenceBase {
    *
    * {@link https://firebase.google.com/docs/reference/js/firebase.database.Reference#parent}
    */
-  get parent(): Reference|null {
+  get parent(): Reference | null {
     if (this.path === '/') return null;
     return new Reference(this.database, this.path.substring(0, this.path.lastIndexOf('/')));
   }

lib/modules/database/snapshot.js

@@ -17,9 +17,14 @@ export default class Snapshot {
   _childKeys: Array<string>;
 
   constructor(ref: Reference, snapshot: Object) {
-    this.ref = ref;
     this.key = snapshot.key;
 
+    if (ref.key !== snapshot.key) {
+      this.ref = ref.child(snapshot.key);
+    } else {
+      this.ref = ref;
+    }
+
     // internal use only
     this._value = snapshot.value;
     this._priority = snapshot.priority === undefined ? null : snapshot.priority;