Question

I have just deployed my app to heroku, and after some problems, it seem to work.
But then i try to add a record to an sqlite3 database from the app, it’s not working, and isn’t redirecting me to ‘/’.

It’s a sinatra app, i have installed all the data mapper dependencies, and the logs doesn’t repost errors.
here is the code

require 'rubygems'
require 'sinatra'
require 'dm-core'  
require 'dm-timestamps'  
require 'dm-validations'  
require 'dm-migrations'
DataMapper::setup(:default, "sqlite3://#{Dir.pwd}/rubrica.db")

class Contatto  
  include DataMapper::Resource  
  property :id, Serial  
  property :fname, Text
  property :lname, Text
  property :phone, Text  
  property :mail, Text
end  

DataMapper.finalize.auto_upgrade!  

get '/' do
    @title = 'Tutti'
  @Contatti = Contatto.all
    erb :home
end

get '/add' do
    @title = 'Aggiungi'
    erb :aggiungi
end

post '/' do
    c = Contatto.new
    c.fname = params[:fname]
c.lname = params[:lname]
c.phone = params[:phone]
c.mail = params[:mail]
c.save
redirect '/'

end

and the link
here

Answer 1

The problem is that Heroku doesn’t use sqlite. If you specify sqlite as your database of choice, Heroku will do some black magic when it receives the push, and replace the sqlite3 gem with the postgres gem, and then run your application with a postgres database. So that explains why your DataMapper::setup(:default, "sqlite3://#{Dir.pwd}/rubrica.db") call isn’t working.

Read this Heroku doc for more information.

Upon some further reading of the Heroku docs, it appears that you need to change your call to Datamapper to be as such:

DataMapper.setup(:default, ENV['DATABASE_URL'] || 'sqlite3://#{Dir.pwd}/rubrica.db')