module Sequel::SQL::OperatorBuilders

  1. lib/sequel/sql.rb
Parent: SQL

These methods are designed as replacements for the core extension operator methods, so that Sequel is still easy to use if the core extensions are not enabled.

The following methods are defined via metaprogramming: +, -, *, /, &, |. The +, -, *, and / operators return numeric expressions combining all the arguments with the appropriate operator, and the & and | operators return boolean expressions combining all of the arguments with either AND or OR.

Methods

Public Instance

  1. ~

Public Instance methods

~ (arg)

Invert the given expression. Returns a Sequel::SQL::BooleanExpression created from this argument, not matching all of the conditions.

Sequel.~(nil) # SQL: NOT NULL
Sequel.~([[:a, true]]) # SQL: a IS NOT TRUE
Sequel.~([[:a, 1], [:b, [2, 3]]]) # SQL: a != 1 OR b NOT IN (2, 3)
[show source] 
# File lib/sequel/sql.rb, line 812
def ~(arg)
  if condition_specifier?(arg)
    SQL::BooleanExpression.from_value_pairs(arg, :OR, true)
  else
    SQL::BooleanExpression.invert(arg)
  end
end