Hi there, I am using PostgreSQL and I noticed that if a column is an array and set to be validated for uniqueness it generates an invalid SQL query such as: SELECT 1 AS one FROM "postgresql_arrays" WHERE "postgresql_arrays"."nicknames" = ''["john", "johnny"]'' LIMIT 1 This happens because the validator does not encode/typecast the Ruby Array to its database counterpart, and instead is just converted to String with to_s. I have a small patch for this and I would like to hear your opinions. This patch does not break existing tests for PostgreSQL, SQLite or MySQL: https://github.com/w3p/rails/commit/26204692476314298cc6a1ad06c2cddf355a5949 (currently the added test is PostgreSQL-specific, but is located in uniqueness_validation_test.rb, so I''d be happy if someone could give some guidance into proper test organization for this) Thanks, Pedro Padron -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Core" group. To view this discussion on the web visit https://groups.google.com/d/msg/rubyonrails-core/-/yi9pojmJdIIJ. To post to this group, send email to rubyonrails-core@googlegroups.com. To unsubscribe from this group, send email to rubyonrails-core+unsubscribe@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rubyonrails-core?hl=en.