in Rails 3.2, what is a safest way for multiple users to increment the same counter

in Rails 3.2, what is a safest way for multiple users to increment the
same counter



1.Active Record Query Interface — Ruby on Rails Guides

Description:Active Record will perform queries on the database for you and
is compatible with most database systems (MySQL, PostgreSQL and SQLite to
name a few).



2.Active Record Validations — Ruby on Rails Guides

Description:The following methods trigger validations, and will save the
object to the database only if the object is valid: create; create! save;
save! update; update!



3.Riding Rails: Releases - Ruby on Rails

Description:Hi everyone! Rails 3.2.17, 4.0.3 and 4.1.0.beta2 have been
released! These three releases contain important security fixes, so please
upgrade as soon as possible!



4.Storing Log Data - MongoDB

Description:Operations¶ Insertion speed is the primary performance concern
for an event logging system. At the same time, the system must be able to
support flexible queries so ...



5.central Excise manual - Scribd

Description:This manual contains very vital information.. Though this is
old still it will be very useful



6.Stop setInterval call in JavaScript - Stack Overflow

Description:The answers above have already explained how setInterval
returns a handle, and how this handle is used to cancel the Interval
timer. Some architectural considerations:



7.Homestead | Get a site, Get found. Get customers.

Description:Allows companies or individuals to create web sites online.



8.Approxion

Description:The world of software development is a world full of
metaphors. Since its early days, software development has been compared to
fields like writing, construction, and ...



9.Time is the Simplest Thing... - CodeProject

Description:03-06-2000 · This says that if you have a background task that
is controlling something, that it will almost never be able to compete
with the foreground task.



10.Slackware Linux Essentials - Slackbook

Description:Slackware Linux is a registered trademark of Patrick
Volkerding and Slackware Linux, Inc. Linux is a registered trademark of
Linus Torvalds. America Online and AOL ...