diff options
Diffstat (limited to 'activerecord')
3 files changed, 37 insertions, 15 deletions
diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md index 8bbd27bb58..a45d912017 100644 --- a/activerecord/CHANGELOG.md +++ b/activerecord/CHANGELOG.md @@ -11,6 +11,20 @@ *Lauro Caetano* +* Calling `delete_all` on an unloaded `CollectionProxy` no longer + generates a SQL statement containing each id of the collection: + + Before: + + DELETE FROM `model` WHERE `model`.`parent_id` = 1 + AND `model`.`id` IN (1, 2, 3...) + + After: + + DELETE FROM `model` WHERE `model`.`parent_id` = 1 + + *Eileen M. Uchitelle*, *Aaron Patterson* + * Fixed error for aggregate methods (`empty?`, `any?`, `count`) with `select` which created invalid SQL. diff --git a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb index da25e640c1..47f2ad9b10 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb @@ -381,7 +381,7 @@ module ActiveRecord end def binds_from_relation(relation, binds) - if relation.is_a?(Relation) && binds.blank? + if relation.is_a?(Relation) && binds.empty? relation, binds = relation.arel, relation.bind_values end [relation, binds] diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb index c2b9dc08fe..7af4b29ebc 100644 --- a/activerecord/lib/active_record/relation/finder_methods.rb +++ b/activerecord/lib/active_record/relation/finder_methods.rb @@ -129,9 +129,9 @@ module ActiveRecord # def first(limit = nil) if limit - find_nth_with_limit(offset_value, limit) + find_nth_with_limit(offset_index, limit) else - find_nth(:first, offset_value) + find_nth(0, offset_index) end end @@ -181,7 +181,7 @@ module ActiveRecord # Person.offset(3).second # returns the second object from OFFSET 3 (which is OFFSET 4) # Person.where(["user_name = :u", { u: user_name }]).second def second - find_nth(:second, offset_value ? offset_value + 1 : 1) + find_nth(1, offset_index) end # Same as +second+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record @@ -197,7 +197,7 @@ module ActiveRecord # Person.offset(3).third # returns the third object from OFFSET 3 (which is OFFSET 5) # Person.where(["user_name = :u", { u: user_name }]).third def third - find_nth(:third, offset_value ? offset_value + 2 : 2) + find_nth(2, offset_index) end # Same as +third+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record @@ -213,7 +213,7 @@ module ActiveRecord # Person.offset(3).fourth # returns the fourth object from OFFSET 3 (which is OFFSET 6) # Person.where(["user_name = :u", { u: user_name }]).fourth def fourth - find_nth(:fourth, offset_value ? offset_value + 3 : 3) + find_nth(3, offset_index) end # Same as +fourth+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record @@ -229,7 +229,7 @@ module ActiveRecord # Person.offset(3).fifth # returns the fifth object from OFFSET 3 (which is OFFSET 7) # Person.where(["user_name = :u", { u: user_name }]).fifth def fifth - find_nth(:fifth, offset_value ? offset_value + 4 : 4) + find_nth(4, offset_index) end # Same as +fifth+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record @@ -245,7 +245,7 @@ module ActiveRecord # Person.offset(3).forty_two # returns the fifth object from OFFSET 3 (which is OFFSET 44) # Person.where(["user_name = :u", { u: user_name }]).forty_two def forty_two - find_nth(:forty_two, offset_value ? offset_value + 41 : 41) + find_nth(41, offset_index) end # Same as +forty_two+ but raises <tt>ActiveRecord::RecordNotFound</tt> if no record @@ -334,6 +334,10 @@ module ActiveRecord private + def offset_index + offset_value || 0 + end + def find_with_associations join_dependency = construct_join_dependency @@ -468,20 +472,24 @@ module ActiveRecord end end - def find_nth(ordinal, offset) + def find_nth(index, offset) if loaded? - @records.send(ordinal) + @records[index] else + offset += index @offsets[offset] ||= find_nth_with_limit(offset, 1).first end end def find_nth_with_limit(offset, limit) - if order_values.empty? && primary_key - order(arel_table[primary_key].asc).limit(limit).offset(offset).to_a - else - limit(limit).offset(offset).to_a - end + relation = if order_values.empty? && primary_key + order(arel_table[primary_key].asc) + else + self + end + + relation = relation.offset(offset) unless offset.zero? + relation.limit(limit).to_a end def find_last |