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Diffstat (limited to 'guides/source/active_record_validations.md')
| -rw-r--r-- | guides/source/active_record_validations.md | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/guides/source/active_record_validations.md b/guides/source/active_record_validations.md index 6eb5de78be..a086363cf1 100644 --- a/guides/source/active_record_validations.md +++ b/guides/source/active_record_validations.md @@ -638,7 +638,7 @@ class Holiday < ApplicationRecord message: "should happen once per year" } end ``` -Should you wish to create a database constraint to prevent possible violations of a uniqueness validation using the `:scope` option, you must create a unique index on both columns in your database. See [the MySQL manual](http://dev.mysql.com/doc/refman/5.7/en/multiple-column-indexes.html) for more details about multiple column indexes or [the PostgreSQL manual](http://www.postgresql.org/docs/current/static/ddl-constraints.html) for examples of unique constraints that refer to a group of columns. +Should you wish to create a database constraint to prevent possible violations of a uniqueness validation using the `:scope` option, you must create a unique index on both columns in your database. See [the MySQL manual](http://dev.mysql.com/doc/refman/5.7/en/multiple-column-indexes.html) for more details about multiple column indexes or [the PostgreSQL manual](https://www.postgresql.org/docs/current/static/ddl-constraints.html) for examples of unique constraints that refer to a group of columns. There is also a `:case_sensitive` option that you can use to define whether the uniqueness constraint will be case sensitive or not. This option defaults to |