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Diffstat (limited to 'activerecord/CHANGELOG')
| -rw-r--r-- | activerecord/CHANGELOG | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/activerecord/CHANGELOG b/activerecord/CHANGELOG index a914b0c276..0d92e8d574 100644 --- a/activerecord/CHANGELOG +++ b/activerecord/CHANGELOG @@ -14,6 +14,21 @@ * Added Base.validate_presence as an alternative to implementing validate and doing errors.add_on_empty yourself. +* Added Base.validate_uniqueness that alidates whether the value of the specified attributes are unique across the system. + Useful for making sure that only one user can be named "davidhh". + + Model: + class Person < ActiveRecord::Base + validate_uniqueness :user_name + end + + View: + <%= text_field "person", "user_name" %> + + When the record is created, a check is performed to make sure that no record exist in the database with the given value for the specified + attribute (that maps to a column). When the record is updated, the same check is made but disregarding the record itself. + + * Added Base.validate_confirmation that encapsulates the pattern of wanting to validate a password or email address field with a confirmation. Example: Model: |