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Versions: 12
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Contents
module CompositePrimaryKeys
module ActiveRecord
module QueryMethods
def reverse_sql_order(order_query)
if order_query.empty?
# CPK
# return [arel_attribute(primary_key).desc] if primary_key
if primary_key
# break apart CPKs
return primary_key.map do |key|
arel_attribute(key).desc
end
else
raise IrreversibleOrderError,
"Relation has no current order and table has no primary key to be used as default order"
end
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 << " DESC")
end
else
o
end
end
end
end
end
end
Version data entries
12 entries across 12 versions & 1 rubygems