📄️ Sum of prices
Roll up line amounts onto a parent — for example the total of an order from all its items. Use an auto field with a sum formula on connected records.
📄️ Priced dropdown
Let users pick a product (or service, fee, room…) from a dropdown, and automatically fill the price from a linked catalogue. Combine a Reference field with an auto field that copies the price.
📄️ Line total (live formula)
Show quantity × unit price instantly while the user fills a form. A form Live formula runs in the browser; use an auto field when the same total must stay correct after imports, API writes, or related-record changes.
📄️ Discount tiers
Apply different discount rates from rules on the same record — for example by customer type, order size, or age. Use an auto field with several conditional rules; Bobuild evaluates them in order.
📄️ Count open children
Show how many related records are still open — open tickets on a customer, pending applications on a job, unchecked items on a request. Use an auto field with Set to the count of records of type and a filter.
📄️ Sequential counters
Issue a human-facing sequence — invoice numbers, ticket codes, protocol IDs — that stays contiguous. Allocate numbers yourself, not from the auto-generated record id.