ohm-tallyable

A tally plugin for Ohm that keeps counts of records for every value of an attribute

Setup

1. Include the Callbacks and Tallyable modules in your model:

    include Ohm::Callbacks 
    include Ohm::Tallyable
   

2. Add a tally to your model with the following line:

    tally :category
   

You will need to resave every model if they already exist.

Usage

To query the tallies, use the leaderboard class method.

>> Post.leaderboard(:category)
=> [["Personal", 2], ["Work", 1]]

Advanced Usage

You can also partition the tally by a certain attribute:

tally :category, :by => :site_id

You will need to provide a value for this attribute every time you check the leaderboard:

Post.leaderboard(:category, :site_id => 'ar') 

If for any reason you find yourself having to recompute the tallies, you can do so with this line of code:

Post.retally(:category)

Requirements

This plugin works with Ohm versions higher than 0.1.3.

Acknowledgements

Many thanks to Damian Janowski (https://github.com/djanowski) who took care to explain me the details of coding an Ohm plugin and providing many ideas on how to handle certain cases.