Merge pull request #1392 from sharetribe/handle-sparse-attributes-in-…

…data-update

Handle entity update with sparse attributes

CHANGELOG.md

@@ -14,6 +14,8 @@ way to update this template, but currently, we follow a pattern:
 
 ## Upcoming version 2020-XX-XX
 
+- [change] Handle entity update with sparse attributes.
+  [#1392](https://github.com/sharetribe/ftw-daily/pull/1392)
 - [change] Remove react-google-maps dependency. It has not been maintained for 3 years. From now on,
   we use Google Maps API directly. However, the default map provider is still Mapbox.
   [#1389](https://github.com/sharetribe/ftw-daily/pull/1389)

src/util/data.js

@@ -27,7 +27,10 @@ export const combinedResourceObjects = (oldRes, newRes) => {
     throw new Error('Cannot merge resource objects with different ids or types');
   }
   const attributes = newRes.attributes || oldRes.attributes;
-  const attrs = attributes ? { attributes: { ...attributes } } : null;
+  const attributesOld = oldRes.attributes || {};
+  const attributesNew = newRes.attributes || {};
+  // Allow (potentially) sparse attributes to update only relevant fields
+  const attrs = attributes ? { attributes: { ...attributesOld, ...attributesNew } } : null;
   const relationships = combinedRelationships(oldRes.relationships, newRes.relationships);
   const rels = relationships ? { relationships } : null;
   return { id, type, ...attrs, ...rels };