method

reset_pk_sequence!

v4.2.7 - Show latest stable - 0 notes - Class: SchemaStatements

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What's this?

reset_pk_sequence!(table, pk = nil, sequence = nil) public

Resets the sequence of a table’s primary key to the maximum value.

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb, line 323
        def reset_pk_sequence!(table, pk = nil, sequence = nil) #:nodoc:
          unless pk and sequence
            default_pk, default_sequence = pk_and_sequence_for(table)

            pk ||= default_pk
            sequence ||= default_sequence
          end

          if @logger && pk && !sequence
            @logger.warn "#{table} has primary key #{pk} with no default sequence"
          end

          if pk && sequence
            quoted_sequence = quote_table_name(sequence)

            select_value               SELECT setval('#{quoted_sequence}', (SELECT COALESCE(MAX(#{quote_column_name pk})+(SELECT increment_by FROM #{quoted_sequence}), (SELECT min_value FROM #{quoted_sequence})) FROM #{quote_table_name(table)}), false), 'SCHEMA'
          end
        end

reset_pk_sequence!

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