Kaminari API Meta Data

A gem for adding Kaminari collection meta data to your API responses that matches the format that works with the Kaminari paginate helper method.

• Ruby >= 3.0

Add this line to your application's Gemfile:

gem "kaminari-api-meta-data", require: "kaminari_api_meta_data"

And then execute:

$ bundle

Or install it yourself as:

$ gem install kaminari-api-meta-data

and then add require "kaminari_api_meta_data" to your Ruby file(s)

Add the include to your class, in this example using the ApplicationController from a Rails API project.

class ApplicationController < ActionController::API
  include ::KaminariApiMetaData

  # ...
end

Then in a controller method use something like:

def index
  @things = Thing.unscoped.page(params[:page]).per(20)

  render json: @things, root: :things, meta: meta_data(@things)
end

This will return JSON like so:

{
  "things": [],
  "meta": {
    "current_page": 1,
    "next_page": 2,
    "per_page": 20,
    "prev_page": null,
    "total_pages": 5,
    "total_count": 91
  }
}

It is possible to extend the meta data returned by providing an optional Hash of properties to the meta_data method.

meta = meta_data(@things, foo: "bar")
puts meta
# {
#   current_page: 1,
#   next_page: 2,
#   per_page: 20,
#   prev_page: nil,
#   total_pages: 5,
#   total_count: 91,
#   foo: "bar"
# }

• Check out the latest master and/or develop branches to make sure the feature hasn't been implemented or the bug hasn't been fixed yet
• Check out the issue tracker to make sure someone already hasn't requested it and/or contributed it
• Fork the project
• Start a feature/bugfix branch off of develop (using Git Flow approach)
• Commit and push until you are happy with your contribution
• Make sure to add tests for it. This is important so I don't break it in a future version unintentionally
• When you are done generate a pull request
• Please try not to mess with the Rakefile, version, or history. If you want to have your own version, or is otherwise necessary, that is fine, but please isolate to its own commit so I can cherry-pick around it.

The gem is available as open source under the terms of the MIT License.