Record and show last used date of SSH Keys

Addresses: Issue #13810

1. Adds a last_used_at attribute to the Key table/model
2. Update a key's last_used_at whenever it gets used
3. Display how long ago an ssh key was last used

2 files changed, 10 insertions, 0 deletions

diff --git a/db/migrate/20161221152132_add_last_used_at_to_key.rb b/db/migrate/20161221152132_add_last_used_at_to_key.rb
new file mode 100644
index 00000000000..fb2b15817de
--- /dev/null
+++ b/db/migrate/20161221152132_add_last_used_at_to_key.rb
@@ -0,0 +1,9 @@
+class AddLastUsedAtToKey < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def change
+    add_column :keys, :last_used_at, :datetime
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 2198dcee2cd..6834218553f 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -528,6 +528,7 @@ ActiveRecord::Schema.define(version: 20161226122833) do
     t.string "fingerprint"
     t.boolean "public", default: false, null: false
     t.boolean "can_push", default: false, null: false
+    t.datetime "last_used_at"
   end
 
   add_index "keys", ["fingerprint"], name: "index_keys_on_fingerprint", unique: true, using: :btree