diff options
Diffstat (limited to 'activerecord/lib/active_record/relation/merger.rb')
| -rw-r--r-- | activerecord/lib/active_record/relation/merger.rb | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/activerecord/lib/active_record/relation/merger.rb b/activerecord/lib/active_record/relation/merger.rb index 182f654897..03824ffff9 100644 --- a/activerecord/lib/active_record/relation/merger.rb +++ b/activerecord/lib/active_record/relation/merger.rb @@ -135,19 +135,17 @@ module ActiveRecord if other.reordering_value # override any order specified in the original relation relation.reorder! other.order_values - elsif other.order_values + elsif other.order_values.any? # merge in order_values from relation relation.order! other.order_values end - relation.extend(*other.extending_values) unless other.extending_values.blank? + extensions = other.extensions - relation.extensions + relation.extending!(*extensions) if extensions.any? end def merge_single_values - if relation.from_clause.empty? - relation.from_clause = other.from_clause - end - relation.lock_value ||= other.lock_value + relation.lock_value ||= other.lock_value if other.lock_value unless other.create_with_value.blank? relation.create_with_value = (relation.create_with_value || {}).merge(other.create_with_value) @@ -155,11 +153,15 @@ module ActiveRecord end def merge_clauses - CLAUSE_METHODS.each do |method| - clause = relation.get_value(method) - other_clause = other.get_value(method) - relation.set_value(method, clause.merge(other_clause)) + if relation.from_clause.empty? && !other.from_clause.empty? + relation.from_clause = other.from_clause end + + where_clause = relation.where_clause.merge(other.where_clause) + relation.where_clause = where_clause unless where_clause.empty? + + having_clause = relation.having_clause.merge(other.having_clause) + relation.having_clause = having_clause unless having_clause.empty? end end end |