Phase 1: standalone events, external_url on nodes

- Migration: node_id nullable on events and occurrences, add
  title/description/is_primary to events, external_url to nodes
- Existing events marked is_primary: true (were all 1:1 with nodes)
- Node: has_one :event -> has_many :events
- Event: belongs_to :node optional, validates title presence for
  standalone events, is_primary uniqueness scoped to node_id,
  display_title helper falling back through node title
- Occurrence: belongs_to :node optional, summary falls back to
  event.display_title
- nodes_helper: event_information uses events.first (interim; will
  be replaced in Phase 3 event UI)
- Tests: fix node.event -> node.events.first in event_test

1 files changed, 6 insertions, 5 deletions

diff --git a/app/helpers/nodes_helper.rb b/app/helpers/nodes_helper.rb
index a054a2e..d88d12a 100644
--- a/app/helpers/nodes_helper.rb
+++ b/app/helpers/nodes_helper.rb
@@ -30,12 +30,13 @@ module NodesHelper
   end
 
   def event_information
-    if @node.event
+    if @node.events.first
+      event = @node.events.first
       safe_join([
-        "#{@node.event.start_time.to_fs(:db)} - #{@node.event.end_time.to_fs(:db)} > ",
-        link_to('show', event_path(@node.event)),
-        ' ',
-        link_to('edit', edit_event_path(@node.event))
+        "#{event.start_time.to_fs(:db)} - #{event.end_time.to_fs(:db)} > ",
+        link_to('show', event_path(event)),
+        ' > ',
+        link_to('edit', edit_event_path(event))
       ])
     else
       safe_join([