Error When Starting Sinatra: "Tried to Create Proc Object Without a Block"

Error when starting Sinatra: tried to create Proc object without a block

From what I can tell, and I've encountered this before, v1.2.5 of Sinatra is the problem. v1.2.3 doesn't do it, so try

gem install sinatra -v 1.2.3

to install the previous version, then add:

gem 'sinatra', '=1.2.3'

before the require statement.

This is documented as an issue.

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EDIT: Sinatra just bumped to a new version, 1.2.6, which fixes this problem. Use gem update sinatra, followed by gem uninstall sinatra -v 1.2.5 to remove the old, buggy, version.

Proc throws error when used with do end

Your first code is interpreted as:

run(Proc.new) do |env|
  ...
end

and the block is is passed to run instead of new. The problem can be solved by doing:

run(Proc.new do |env|
  ...
end)

Why won't Sinatra work correctly?

Looks like it's a bug in sinatra: https://github.com/sinatra/sinatra/issues/258.

As a workaround, try the previous version of sinatra: gem install sinatra -v 1.2.3, either in a new rvm gemset, or specify the version you want in your file with gem 'sinatra' '=1.2.3' before your require sinatra line.

Update:

Sinatra 1.2.5 (the version at fault) has been yanked and a new version released. Anyone getting this error can now just do gem update sinatra and use the updated gem.

How to display sinatra error and other variables in minitest output

You can use puts last_response.errors to show the Rack error messages for the last response.

Resolving Sinatra and HTTParty method name clashes

The get method is a class method.

Please try to the following, but I've not tried it out yet...

self.class.get

Sinatra with a Pure Ruby database

To take a leaf about of sinatra-redis's book, you can do something like this:

require 'sinatra'
require 'kirbybase'

helpers do
  # Create a helper to allow easier access to settings.kirby
  # Name it whatever you want
  def kirby
    settings.kirby
  end
end

configure do
  # Initialise kirby
  set :kirby, KirbyBase.new
end

get '/' do
  cars_tbl = kirby.get_table(:cars)
  ferrari = cars_tbl.select { |r| r.recno == 9 }
  "Car is #{ferrari}"
end

Heroku production issues with Sinatra app (Error R10)

Heroku dynamically assigns the port. You are starting the app on port 4567 when you call the run! method in lines 85-97 of myapp.rb. You should be able to remove those three lines and use config.ru to start your app.

It you add the heroku gem to your Gemfile, you can remove the Procfile. Otherwise you should cahnge it start the app via backup:

web: bundle exec rackup config.ru -p $PORT

You could also add 'thin' to your Gemfile and use a Procfile like this

web: bundle exec thin start -R config.ru -e $RACK_ENV -p $PORT

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