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Contents
module Arel
module Visitors
###
# This class produces SQL for JOIN clauses but omits the "single-source"
# part of the Join grammar:
#
# http://www.sqlite.org/syntaxdiagrams.html#join-source
#
# This visitor is used in SelectManager#join_sql and is for backwards
# compatibility with Arel V1.0
class JoinSql < Arel::Visitors::ToSql
private
def visit_Arel_Nodes_SelectCore o
[o.froms].grep(Nodes::Join).map { |x| visit x }.join ', '
end
def visit_Arel_Nodes_StringJoin o
[
(visit o.left if Nodes::Join === o.left),
visit(o.right)
].compact.join ' '
end
def visit_Arel_Nodes_OuterJoin o
[
(visit o.left if Nodes::Join === o.left),
"LEFT OUTER JOIN #{visit o.right} #{visit o.constraint if o.constraint}"
].compact.join ' '
end
def visit_Arel_Nodes_InnerJoin o
[
(visit o.left if Nodes::Join === o.left),
"INNER JOIN #{visit o.right} #{visit o.constraint if o.constraint}"
].compact.join ' '
end
end
end
end
Version data entries
13 entries across 13 versions & 2 rubygems