Avoid re-loading already loaded relationships. Also fixes issue where wrong

button would be displayed in account lists for unloaded relationships

app/assets/javascripts/components/actions/accounts.jsx

@@ -579,15 +579,18 @@ export function expandFollowingFail(id, error) {
   };
 };
 
-export function fetchRelationships(account_ids) {
+export function fetchRelationships(accountIds) {
   return (dispatch, getState) => {
-    if (account_ids.length === 0) {
+    const loadedRelationships = getState().get('relationships');
+    const newAccountIds = accountIds.filter(id => loadedRelationships.get(id, null) === null);
+
+    if (newAccountIds.length === 0) {
       return;
     }
 
-    dispatch(fetchRelationshipsRequest(account_ids));
+    dispatch(fetchRelationshipsRequest(newAccountIds));
 
-    api(getState).get(`/api/v1/accounts/relationships?${account_ids.map(id => `id[]=${id}`).join('&')}`).then(response => {
+    api(getState).get(`/api/v1/accounts/relationships?${newAccountIds.map(id => `id[]=${id}`).join('&')}`).then(response => {
       dispatch(fetchRelationshipsSuccess(response.data));
     }).catch(error => {
       dispatch(fetchRelationshipsFail(error));

app/assets/javascripts/components/selectors/index.jsx

@@ -5,7 +5,7 @@ const getStatuses = state => state.get('statuses');
 const getAccounts = state => state.get('accounts');
 
 const getAccountBase         = (state, id) => state.getIn(['accounts', id], null);
-const getAccountRelationship = (state, id) => state.getIn(['relationships', id]);
+const getAccountRelationship = (state, id) => state.getIn(['relationships', id], null);
 
 export const makeGetAccount = () => {
   return createSelector([getAccountBase, getAccountRelationship], (base, relationship) => {