Formula field type

[brianlah87]

Propose a new read-only field, which accepts a formula and computes a value based on other fields.

Value should be cached in database, and updated whenever a related field is modified.

Example use cases - given a field for Date of Birth, calculate age. Given an estimated cost and actual cost, calculate difference. Given a bunch of checkbox and dropdown box values, calculate if record is eligible for something.

[bereldhuin]

+1 this will be a really nice feature.