BI Tooling with Rails
summary
A small Rails app called bi is open sourced at paperless post/bi and it replaces a thousand-plus nightly cron queries by letting non‑technical staff run parameterized reports and download CSVs on demand. It uses ActiveRecord to connect to multiple datasources (replica DBs, Graphite, Mixpanel, Elasticsearch) and relies on ERB SQL templates so one developer writes a query once and everyone can change dates or groupings. KPIs persist daily values and percent changes; initial release ships without auth.
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