Merge pull request #19 from cmmartin/patch-1

Return null instead of empty object when document doesn't exist

Author: chrisbianca

firestore/helpers/index.ts

@@ -3,7 +3,10 @@ import { firestore } from 'firebase';
 export const snapshotToData = (
   snapshot: firestore.DocumentSnapshot,
   idField?: string
-) => ({
-  ...snapshot.data(),
-  ...(idField ? { [idField]: snapshot.id } : null),
-});
+) => {
+  if (!snapshot.exists) return null;
+  return {
+    ...snapshot.data(),
+    ...(idField ? { [idField]: snapshot.id } : null),
+  };
+};