extract_value_from_default

Icon_private_sm = private
Icon_protected_sm = protected

extract_value_from_default(default) private

Extracts the value from a PostgreSQL column default definition.

# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 544
        def extract_value_from_default(default)
          case default
            # Quoted types
          when /\A[\(B]?'(.*)'.*::"?([\w. ]+)"?(?:\[\])?\z/
            # The default 'now'::date is CURRENT_DATE
            if $1 == "now".freeze && $2 == "date".freeze
              nil
            else
              $1.gsub("''".freeze, "'".freeze)
            end
            # Boolean types
          when "true".freeze, "false".freeze
            default
            # Numeric types
          when /\A\(?(-?\d+(\.\d*)?)\)?(::bigint)?\z/
            $1
            # Object identifier types
          when /\A-?\d+\z/
            $1
          else
            # Anything else is blank, some user type, or some function
            # and we can't know the value of that, so return nil.
            nil
          end
        end

extract_value_from_default

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