instance method `unique_constraint`

Ruby on Rails 8.1.2

Since v7.1.6

Available in: v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

unique_constraint(...)

Adds a unique constraint.

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

See connection.add_unique_constraint

Parameters

... req

Source

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 316
        def unique_constraint(...)
          @base.add_unique_constraint(name, ...)
        end

Defined in activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb line 316 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::ConnectionAdapters::PostgreSQL::Table

Signature

Parameters