As I understand it, the Sinatra framework, unlike Rails, does not provide an ORM. In that case, how do you talk to a DB in a Sinatra app? Or is Sinatra only for apps that don't use a DB?
If you're using Sinatra, I can't recommend DataMapper highly enough. I have a couple Rails apps where I'm stuck with ActiveRecord, and I'm constantly cursing its shortcomings and design flaws. If you're on Sinatra, DataMapper is a very practical choice.
require "rubygems"
require "sinatra"
require "datamapper"
DataMapper.setup(:default, "sqlite3::memory:")
class Post
include DataMapper::Resource
property :id, Integer, :serial => true
property :title, String
end
Post.auto_migrate!
first_post = Post.new
first_post.title = "First!"
first_post.save
get "/" do
Post.get(1).title
end