unique_constraint_name

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb, line 1049
          def unique_constraint_name(table_name, **options)
            options.fetch(:name) do
              column_or_index = Array(options[:column] || options[:using_index]).map(&:to_s)
              identifier = "#{table_name}_#{column_or_index * '_and_'}_unique"
              hashed_identifier = Digest::SHA256.hexdigest(identifier).first(10)

              "uniq_rails_#{hashed_identifier}"
            end
          end