1 files changed, 21 insertions, 0 deletions

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+class AddLatestPostAtToStream < ActiveRecord::Migration[7.1]
+  def up
+    add_column :streams, :latest_post_at, :datetime
+    
+    Stream.all.each do |stream|
+      if stream.updates.empty?
+        stream.latest_post_at = stream.created_at
+      else
+        stream.latest_post_at = stream.updates.order(created_at: :desc).first.created_at
+      end
+
+      stream.save!
+    end
+
+    change_column_null :streams, :latest_post_at, false
+  end
+
+  def down
+    remove_column :streams, :latest_post_at, :datetime
+  end
+end