This Rails engine allows you to build simple and effective data/reporting APIs and expose them securely to your users. Custom data universes can be queired by clients via SQL-like URL query parameters.
GET https://my.api.host/reports/site_stats.json?select[]=page_views&by[]=date|site&where[site_id.in]=33|44|55&where[date.between]=-30..0
Add it to your Gemfile:
gem 'fiddle'
Mount it in your config/routes.rb:
MyApp::Application.routes.draw do
# ...
mount Fiddle::Engine => "/fiddle", as: :fiddle
end
The engine will add models & controllers to manage which allow you to connect to various RDMS sources, setup data cubes with dimensions, measures, contraints & lookups.
Once in place, users can be given access to these cubes in controllers. Example:
# reports_controller.rb
def show
@cube = Fiddle::Cube.find_by_name!(params[:id])
parser = Fiddle::ParamParser.new(@cube, params)
render json: Fiddle::SQLBuilder.new(@cube, parser.to_hash).dataset
end
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