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Class: Arel::Nodes::JoinSource

Do not use. This class is for internal use only.

Overview

::Class that represents a join source

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

Class Method Summary

Binary - Inherited

.new

Instance Attribute Summary

Binary - Inherited

#left, #right

Node - Inherited

#equality?

Instance Method Summary

Binary - Inherited

#==

Alias for Binary#eql?.
#eql?, #hash, #initialize_copy

::Arel::Math - Included

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

::Arel::OrderPredications - Included

#asc, #desc

::Arel::AliasPredication - Included

#as

::Arel::Predications - Included

#between, #case_insensitive_eq, #case_sensitive_eq, #concat, #contains, #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, #overlaps, #quoted_array, #when, #grouping_all, #grouping_any, #infinity?, #open_ended?, #quoted_node, #unboundable?

::Arel::Expressions - Included

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

Node - Inherited

#and

Factory method to create an And node.
#fetch_attribute, #invert,
#not

Factory method to create a Nodes::Not node that has the recipient of the caller as a child.
#or

Factory method to create a Grouping node that has an Or node as a child.
#to_sql

FIXME: this method should go away.

::Arel::FactoryMethods - Included

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

Create a LOWER() function.

Constructor Details

.new(single_source, joinop = []) ⇒ JoinSource

[ GitHub ] 

  


# File 'activerecord/lib/arel/nodes/join_source.rb', line 13



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


  







Instance Attribute Details



  

    #empty?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/arel/nodes/join_source.rb', line 17



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