Merge pull request #156 from callmephilip/patch-1

add a note regarding reducer for custom redux actions

react-docs/source/cache-updates.md

@@ -377,8 +377,7 @@ const CommentsPageWithData = graphql(CommentsPageQuery, {
 
 As you can see, the `reducer` option can be used to achieve the same goal as `updateQueries`, but it is more flexible and works with any type of **apollo** action, not just mutations. For example, the query result can be updated based on another query's result.
 
-**Coming soon:** will be invoked on any redux action, not just apollo specific.
-
+*Note:* It is not currently possible to respond to actions arriving from outside of Apollo (e.g. your custom Redux actions) in a result reducer. See [this thread](https://github.com/apollographql/apollo-client/issues/1013) for more information.
 
 
 **When should you use reducer vs. updateQueries vs. refetchQueries?**