Enable caching of schema.rbschema-cache

This is a lesser known Rails feature that removes the need for querying
various internal tables for schema details (e.g. column types) every
time Rails boots up.

This feature is described in http://iempire.ru/2016/12/13/schema-cache/
and was brought to our attention by @stanhu.

Since the schema cache is specific to the database we only enable this
on PostgreSQL.

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/tasks/db.rake b/lib/tasks/db.rake
new file mode 100644
index 00000000000..664e75494b8
--- /dev/null
+++ b/lib/tasks/db.rake
@@ -0,0 +1,7 @@
+namespace :db do
+  namespace :schema do
+    task 'dump' do
+      Rake::Task['db:schema:cache:dump'].invoke
+    end
+  end
+end