method

unique_constraint

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

unique_constraint(*args)

public

Adds a unique constraint.

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

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

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_definitions.rb, line 323
        def unique_constraint(*args)
          @base.add_unique_constraint(name, *args)
        end

unique_constraint

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