/ Ruby on Rails
/
method

unique_constraint

rails latest stable - Class: ActiveRecord::ConnectionAdapters::PostgreSQL::Table

Method not available on this version

This method is only available on newer versions. The first available version (v8.1.1) is shown here.

unique_constraint(...)
public

Adds a unique constraint.

t.unique_constraint(:position, name: 'unique_position', deferrable: :deferred, nulls_not_distinct: true)

See {connection.add_unique_constraint}[rdoc-ref:SchemaStatements#add_unique_constraint]