diff options
Diffstat (limited to 'activerecord/lib/active_record/relation/finder_methods.rb')
| -rw-r--r-- | activerecord/lib/active_record/relation/finder_methods.rb | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb index 3ea3c33fcc..9186b33bd2 100644 --- a/activerecord/lib/active_record/relation/finder_methods.rb +++ b/activerecord/lib/active_record/relation/finder_methods.rb @@ -1,5 +1,7 @@ module ActiveRecord module FinderMethods + ONE_AS_ONE = '1 AS one' + # Find by id - This can either be a specific id (1), a list of ids (1, 5, 6), or an array of ids ([5, 6, 10]). # If no record can be found for all of the listed ids, then RecordNotFound will be raised. If the primary key # is an integer, find by id coerces its arguments using +to_i+. @@ -32,7 +34,7 @@ module ActiveRecord # end # # ==== Variations of +find+ - # + # # Person.where(name: 'Spartacus', rating: 4) # # returns a chainable list (which can be empty). # @@ -49,7 +51,7 @@ module ActiveRecord # # Person.where(name: 'Spartacus', rating: 4).exists?(conditions = :none) # # returns a boolean indicating if any record with the given conditions exist. - # + # # Person.where(name: 'Spartacus', rating: 4).select("field1, field2, field3") # # returns a chainable list of instances with only the mentioned fields. # @@ -124,7 +126,7 @@ module ActiveRecord # def first(limit = nil) if limit - find_first_with_limit(order_values, limit) + find_first_with_limit(limit) else find_first end @@ -202,7 +204,7 @@ module ActiveRecord relation = construct_relation_for_association_find(construct_join_dependency) return false if ActiveRecord::NullRelation === relation - relation = relation.except(:select, :order).select("1 AS one").limit(1) + relation = relation.except(:select, :order).select(ONE_AS_ONE).limit(1) case conditions when Array, Hash @@ -211,7 +213,6 @@ module ActiveRecord relation = relation.where(table[primary_key].eq(conditions)) if conditions != :none end - relation = relation.with_default_scope connection.select_value(relation.arel, "#{name} Exists", relation.bind_values) end @@ -354,11 +355,11 @@ module ActiveRecord if loaded? @records.first else - @first ||= find_first_with_limit(with_default_scope.order_values, 1).first + @first ||= find_first_with_limit(1).first end end - def find_first_with_limit(order_values, limit) + def find_first_with_limit(limit) if order_values.empty? && primary_key order(arel_table[primary_key].asc).limit(limit).to_a else |