diff options
Diffstat (limited to 'activerecord/lib/active_record/relation/finder_methods.rb')
| -rw-r--r-- | activerecord/lib/active_record/relation/finder_methods.rb | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/relation/finder_methods.rb b/activerecord/lib/active_record/relation/finder_methods.rb index ba222aac93..86976077d6 100644 --- a/activerecord/lib/active_record/relation/finder_methods.rb +++ b/activerecord/lib/active_record/relation/finder_methods.rb @@ -79,6 +79,19 @@ module ActiveRecord # Person.where(["user_name = :u", { u: user_name }]).first # Person.order("created_on DESC").offset(5).first # Person.first(3) # returns the first three objects fetched by SELECT * FROM people LIMIT 3 + # + # ==== Rails 3 + # + # Person.first # SELECT "users".* FROM "users" LIMIT 1 + # + # NOTE: Rails 3 may not +order+ this query by be the primary key. + # The order will depend on the database implementation. + # In order to ensure that behavior use <tt>User.order(:id).first</tt> instead. + # + # ==== Rails 4 + # + # Person.first # SELECT "users".* FROM "users" ORDER BY "users"."id" ASC LIMIT 1 + # def first(limit = nil) if limit if order_values.empty? && primary_key |