Mongoid sample, for sinatra app.

readme.txt

./mongoimport -d mongoid_test -c tmps --type csv --file testlist.csv --headerline

app.rb

require 'sinatra'
require 'mongoid'
require 'json'
require 'sinatra/reloader' if development?

Mongoid.load!("mongoid.yml", :development)

class Tmp
  include Mongoid::Document

  field :name, type: String
  field :num, type: Integer
  field :val, type: Integer
end 

get '/test.json' do
  content_type :json
  allTmp = Tmp.all
  allTmp.to_json
end

get '/' do
  "Hello world, %d"%Tmp.count
  
end

config.ru

require 'sinatra'
require './app'

run Sinatra::Application

mongoid.yml

development:
  sessions:
    default:
      database: mongoid_test
      hosts: 
        - localhost:27017

testlist.csv