have cursor be the date of the oldest comment

client/coral-embed-stream/src/Embed.js

@@ -78,9 +78,14 @@ class Embed extends Component {
   }
 
   loadMoreComments = () => {
+
+    if (!this.props.asset.comments.length) {
+      return;
+    }
+
     this.props.loadMore({
       limit: 10,
-      cursor: new Date(),
+      cursor: this.props.asset.comments[this.props.asset.comments.length - 1].created_at,
       asset_id: this.props.asset.id,
       sort: 'REVERSE_CHRONOLOGICAL'
     })

client/coral-framework/graphql/queries/index.js

@@ -35,13 +35,14 @@ export const queryStream = graphql(STREAM_QUERY, {
           asset_id,
           sort
         },
-        updateQuery: ({asset}, {fetchMoreResult:{data:{new_top_level_comments}}}) => {
-          const comments = asset.comments.concat(new_top_level_comments);
+        updateQuery: (oldData, {fetchMoreResult:{data:{new_top_level_comments}}}) => {
+          const asset = {
+            ...oldData.asset,
+            comments: [...oldData.asset.comments, ...new_top_level_comments]
+          };
           return {
-            asset: {
-              ...asset,
-              comments
-            }
+            ...oldData,
+            asset
           };
         }
       });

client/coral-sign-in/components/SignInContent.js

@@ -97,7 +97,7 @@ const SignInContent = ({
 SignInContent.propTypes = {
   auth: PropTypes.shape({
     isLoading: PropTypes.bool.isRequired,
-    error: PropTypes.object,
+    error: PropTypes.string,
     emailVerificationFailure: PropTypes.bool
   }).isRequired,
   fetchSignInFacebook: PropTypes.func.isRequired,