instance method
reverse_sql_order
Ruby on Rails 5.0.7.2
Since v3.0.20 Private — implementation detail, not part of the public APISignature
reverse_sql_order(order_query)No documentation comment.
Parameters
-
order_queryreq
Source
# File activerecord/lib/active_record/relation/query_methods.rb, line 1116
def reverse_sql_order(order_query)
if order_query.empty?
return [arel_attribute(primary_key).desc] if primary_key
raise IrreversibleOrderError,
"Relation has no current order and table has no primary key to be used as default order"
end
order_query.flat_map do |o|
case o
when Arel::Attribute
o.desc
when Arel::Nodes::Ordering
o.reverse
when String
if does_not_support_reverse?(o)
raise IrreversibleOrderError, "Order #{o.inspect} can not be reversed automatically"
end
o.split(',').map! do |s|
s.strip!
s.gsub!(/\sasc\Z/i, ' DESC') || s.gsub!(/\sdesc\Z/i, ' ASC') || s.concat(' DESC')
end
else
o
end
end
end
Defined in activerecord/lib/active_record/relation/query_methods.rb line 1116
· View on GitHub
· Improve this page
· Find usages on GitHub
Defined in ActiveRecord::QueryMethods