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ActiveModel + Redis with the aim to mimic ActiveRecord where possible.


Modis 4.0+ supports Rails 5.2 and higher, including Rails 6.1, as well as Ruby 2.3 and above, including Ruby 3.0. Tests are also being run with JRuby. For details please check the current CI setup.

For releases supporting older Rails versions such as 4.2-5.1 please check out the 3.x releases.


Add this line to your application's Gemfile:

gem 'modis'

And then execute:

$ bundle

Or install it yourself as:

$ gem install modis


class MyModel
  include Modis::Model
  attribute :name, :string
  attribute :age, :integer

MyModel.create!(name: 'Ian', age: 28)

all index

Modis, by default, creates an all index in redis in which it stores all the IDs for records created. As a result, a large amount of memory will be consumed if many ids are stored. The all index functionality can be turned off by using enable_all_index

class MyModel
  include Modis::Model
  enable_all_index false

By disabling the all index functionality, the IDs of each record created won't be saved. As a side effect, using all finder method will raise a IndexError exception as we would not have enough information to fetch all records. See for more context.

Supported Features



  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request