Class: Object

Inherits:
BasicObject
Defined in:
lib/sequel/extensions/sql_expr.rb,
lib/sequel/extensions/blank.rb

Overview

The sql_expr extension adds the sql_expr method to every object, which returns an wrapped object that works nicely with Sequel's DSL. This is best shown by example:

1.sql_expr < :a     # 1 < a
false.sql_expr & :a # FALSE AND a
true.sql_expr | :a  # TRUE OR a
~nil.sql_expr       # NOT NULL
"a".sql_expr + "b"  # 'a' || 'b'

Instance Method Summary (collapse)

Instance Method Details

- (Boolean) blank?

Objects are blank if they respond true to empty?

Returns:

  • (Boolean) 


12
13
14
 
# File 'lib/sequel/extensions/blank.rb', line 12

def blank?
  respond_to?(:empty?) && empty?
end

- (Object) sql_expr

Return a copy of the object wrapped in a Sequel::SQL::Wrapper. Allows easy use of the Object with Sequel's DSL. You'll probably have to make sure that Sequel knows how to literalize the object properly, though.



17
18
19
 
# File 'lib/sequel/extensions/sql_expr.rb', line 17

def sql_expr
  Sequel::SQL::Wrapper.new(self)
end