module Sequel::Postgres::IntervalDatabaseMethods

  1. lib/sequel/extensions/pg_interval.rb

Methods

Public Class

  1. extended
  2. literal_duration

Public Instance

  1. bound_variable_arg

Constants

DURATION_UNITS = [:years, :months, :weeks, :days, :hours, :minutes, :seconds].freeze  
PARSER = Parser.new  

Single instance of Parser used for parsing, to save on memory (since the parser has no state).

Public Class methods

extended(db)

Reset the conversion procs if using the native postgres adapter, and extend the datasets to correctly literalize ActiveSupport::Duration values.

[show source] 
    # File lib/sequel/extensions/pg_interval.rb
143 def self.extended(db)
144   db.instance_exec do
145     extend_datasets(IntervalDatasetMethods)
146     add_conversion_proc(1186, Postgres::IntervalDatabaseMethods::PARSER)
147     if respond_to?(:register_array_type)
148       register_array_type('interval', :oid=>1187, :scalar_oid=>1186)
149     end
150     @schema_type_classes[:interval] = ActiveSupport::Duration
151   end
152 end
literal_duration(duration)

Return an unquoted string version of the duration object suitable for use as a bound variable.

[show source] 
   # File lib/sequel/extensions/pg_interval.rb
52 def self.literal_duration(duration)
53   h = Hash.new(0)
54   duration.parts.each{|unit, value| h[unit] += value}
55   s = String.new
56 
57   DURATION_UNITS.each do |unit|
58     if (v = h[unit]) != 0
59       s << "#{v.is_a?(Integer) ? v : sprintf('%0.6f', v)} #{unit} "
60     end
61   end
62 
63   if s.empty?
64     '0'
65   else
66     s
67   end
68 end

Public Instance methods

bound_variable_arg(arg, conn)

Handle ActiveSupport::Duration values in bound variables.

[show source] 
    # File lib/sequel/extensions/pg_interval.rb
155 def bound_variable_arg(arg, conn)
156   case arg
157   when ActiveSupport::Duration
158     IntervalDatabaseMethods.literal_duration(arg)
159   else
160     super
161   end
162 end