Class: Arel::Nodes::JoinSource

Inherits:
Binary show all
Defined in:
lib/arel/nodes/join_source.rb

Overview

Class that represents a join source

http://www.sqlite.org/syntaxdiagrams.html#join-source

Instance Attribute Summary

Attributes inherited from Binary

#left, #right

Instance Method Summary collapse

Methods inherited from Binary

#eql?, #hash, #initialize_copy

Methods included from Math

#&, #*, #+, #-, #/, #<<, #>>, #^, #|, #~@

Methods included from OrderPredications

#asc, #desc

Methods included from AliasPredication

#as

Methods included from Predications

#between, #concat, #does_not_match, #does_not_match_all, #does_not_match_any, #does_not_match_regexp, #eq, #eq_all, #eq_any, #gt, #gt_all, #gt_any, #gteq, #gteq_all, #gteq_any, #in, #in_all, #in_any, #is_distinct_from, #is_not_distinct_from, #lt, #lt_all, #lt_any, #lteq, #lteq_all, #lteq_any, #matches, #matches_all, #matches_any, #matches_regexp, #not_between, #not_eq, #not_eq_all, #not_eq_any, #not_in, #not_in_all, #not_in_any, #when

Methods included from Expressions

#average, #count, #extract, #maximum, #minimum, #sum

Methods inherited from Node

#and, #each, #not, #or, #to_sql

Methods included from FactoryMethods

#coalesce, #create_and, #create_false, #create_join, #create_on, #create_string_join, #create_table_alias, #create_true, #grouping, #lower

Constructor Details

#initialize(single_source, joinop = []) ⇒ JoinSource

Returns a new instance of JoinSource.



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# File 'lib/arel/nodes/join_source.rb', line 11

def initialize(single_source, joinop = [])
  super
end

Instance Method Details

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/arel/nodes/join_source.rb', line 15

def empty?
  !left && right.empty?
end