computed_selects

🚀 Select Computed Attributes with Arel

Compute dynamic attributes at query time and return them alongside model fields. Use Arel.sql or Arel nodes to calculate values like discounts, full names, or timestamps differences directly in SQL.

users = User
  .select(
    :id,
    :first_name,
    :last_name,
    Arel.sql("(EXTRACT(epoch FROM (NOW() - created_at)) / 86400)::int AS days_since_signup")
  )