Exception: LowCardTables::Errors::LowCardNoUniqueIndexError
- Inherits:
-
LowCardError
- Object
- StandardError
- LowCardError
- LowCardTables::Errors::LowCardNoUniqueIndexError
- Defined in:
- lib/low_card_tables/errors.rb
Overview
Raised when there is no unique index present on the low-card table across all value columns. This index is required for operation of low_card_tables
; various facilities in its support for migrations (and an explicit API call) will create or remove it for you at your request, or just maintain it automatically.