I'm looking to run migrations for a Sinatra app called "sinatra_active_record_start" but can't get my settings right.
When I run bundle exec rake -T I get:
LoadError: cannot load such file -- sinatra_active_record_start
/Users/jasonnappy/ga_wdi/exisiting_resources/wdi_london/resources/materials/local/06-server-applications/ruby/sinatra/active-record/sinatra_active_record_start/Rakefile:1:in `require'
Same as when I run:
bundle exec rake db:create_migration first_migration
My Gemfile is:
source "https://rubygems.org"
gem "sinatra"
gem "activerecord"
gem "sinatra-activerecord"
gem "rake"
gem "thin"
My Rakefile is:
require "sinatra_active_record_start"
require "sinatra/activerecord/rake"
namespace :db do
desc "Migrate the database"
task(:migrate => :environment) do
ActiveRecord::Base.logger = Logger.new(STDOUT)
ActiveRecord::Migration.verbose = true
ActiveRecord::Migrator.migrate("db/migrate")
end
end
The top of app.rb is:
require "bundler/setup"
require "sinatra"
require "activerecord"
require "sinatra/activerecord"
I know there are some redundancies, but at this point, I'm just trying to plug in and make something work that I found on the internet.
First, it doesn't look like you are requiring an adapter for your database. Adding one, like
gem "sqlite3"
to your Gemfile, should fix that.
Second, sinatra/activerecord creates migrations in a directory called "db/migrate" by default. That's where your migrations should live, not the root directory.
Move your migration there and remove
require "sinatra_active_record_start"
from your Rakefile. That's the code that is causing the immediate error. You shouldn't need to require each migration in the Rakefile.
Following these steps should make your migrations run, although you should rename the file to follow ActiveRecord convention. Run
rake db:create_migration NAME='sinatra_active_record_start'
to create a new one with a timestamp.
"Sinatra Active Record Starter Kit" is an example repo to help you get started.
Related
I am building a Sinatra app and trying to use ActiveRecord. Rake is not recognizing my controller file and returning rake aborted! LoadError: cannot load such file whenever I run any rake task. Here are my gems:
source "https://rubygems.org"
ruby "2.7.2"
gem 'sinatra'
gem 'thin'
gem 'shotgun'
gem 'require_all'
gem 'activerecord'
gem 'sinatra-activerecord'
gem 'sqlite3'
gem 'rake', '~> 13.0.6'
And here's the Rakefile:
# Rakefile
require 'sinatra/activerecord/rake'
require_relative './app/test_controller.rb'
Any ideas? In the Rakefile, I've tried require_relative for ./app, /app, ../app, etc. Also, I'm on a bit of a time crunch, so if I can't sort this out quickly do I need Rake to use ActiveRecord?
TL/DR:
remove require_relative './app/test_controller.rb' from your Rakefile.
Details:
Rake is a tool that lets us define and run commands from the command line (e.g. rake db:migrate). Activerecord comes bundled with a few rake tasks (like generating a migration file, running one, dumping/loading your database schema, etc) that make it much easier to work with.
Rake tasks are just ruby, so to run a Rake task successfully it will need to load any classes/files it depends on (which is typically handled independently by each rake task). If you're going to write your own rake tasks you'll want to ensure that the tasks require the relevant files. Loading your app (or sinatra controllers) in a base Rakefile wouldn't generally be advised as it wouldn't always be needed.
The exception to this would be if you needed to load some kind of 'boot' or 'config' file in order to setup your database connections/configuration so that the activerecord rake tasks could successfully connect to your database.
im developing a application in ruby with sinatra. evrything worked finely until i put it on heroku. heroku gives me internal server error but no error code ):
currently my workstation is a windows computer.
my log loooks like this: http://i.imgur.com/Xd3QAms.png
config.ru
require 'tilt/haml'
require 'sass/plugin/rack'
require '4c96748'
run Sinatra::Application
gemfile
source 'https://rubygems.org'
ruby '2.2.3'
gem 'sinatra', '1.1.0'
procfile
web: bundle exec rackup config.ru -p $PORT
4c96748.rb
require 'sinatra'
require 'tilt/haml'
get '/' do
haml :index
end
pleaase help me, what do i need to do?
try following in your 6c96748.rb
require 'rubygems'
require 'sinatra'
require 'haml'
get '/' do
haml :index
end
From your logfile:
LoadError - cannot load such file -- haml
There is no Haml installed on Heroku. Every dependency you need on Heroku needs to be in your Gemfile.
Add the following Line to Gemfile:
gem 'haml'
Don't forget to run bundle before commiting your changes and pushing to heroku again.
(As a sidenote, your Sinatra version is quite outdated. The current version is 1.4.6 (see https://rubygems.org/gems/sinatra))
I'm writing a gem that depends on another gem I've created.
In my host gem, I'm requiring my gem as a dependency like this:
$:.push File.expand_path('../lib', __FILE__)
Gem::Specification.new do |s|
s.require_path = "lib"
s.files = Dir["lib/**/*"]
s.test_files = Dir["spec/**/*"]
s.add_dependency "my_other_gem"
end
My gemfile looks like this:
source "http://rubygems.org"
gem 'my_other_gem' path: '../my_other_gem', require: 'my_other_gem'
gemspec
And inside the host gem, I've got a class that requires my_other_gem:
require 'my_other_gem'
In my_other_gem, inside lib/my_other_gem.rb, I've got two more require classes. So it looks like this:
require 'my_other_gem/foo'
require 'my_other_gem/bar'
When I spin up IRB in the host app and run require 'my_other_gem', I get this error
LoadError: cannot load such file -- my_other_gem
When I'm playing in the my_other_gem directory and I spin up IRB, the same require 'my_other_gem' command does not error out. Everything runs normally. But for some reason I can't require my_other_gem when I'm in my host gem.
What step am I missing?
How do you start irb? You need to run it in the bundler context with bundle exec.
I just tried and if I just run irb, I get the same error.
But if I run bundle exec irb, it works.
I am trying to write my first Rake file. It looks something like this:
lib\tasks\routes_check.rake:
require 'curb'
task :route_test do
puts "checking routes"
end
Running rake route_test fails with the message:
rake aborted!
no such file to load -- curb
I ran it with --trace and the trace is here.
I can't figure out why this does not work. In the same lib/tasks directory, I saved a .rb file which looks like:
task.rb:
require 'curb'
puts "Hello"
When I run this file with ruby task.rb, it works fine. What am I doing wrong here?
Rails applications by default use Bundler, so you need to add gem "curb" to your Gemfile and then ”install” (register) the new gem to Rails bundle with gem install.
I'm wondering how one can use Bundler with Sinatra. The idea is to use the gems that Bundler downloads inside the .gems folder.
Inside your Sinatra app, you just have to require the bundler setup:
require "bundler/setup"
require "sinatra"
get "/" do
"Hello world!"
end
Alternatively, if you don't want to add the additional require "bundler/setup" at the top of your app, you can instead invoke sinatra via bundle exec (e.g. bundle exec ruby myapp.rb)
This assumes that you have a Gemfile in the root of your application. It might look like this:
source "http://rubygems.org"
gem "sinatra"
This also assumes that you've already installed bundler (gem install bundler) and that you ran bundle install to install all the gem dependencies.
I believe the best way is described here on EngineYard blog:
# This makes sure the bundled gems are in our $LOAD_PATH
require File.expand_path(File.join(File.dirname(__FILE__), 'vendor', 'gems', 'environment'))
# This actually requires the bundled gems
Bundler.require_env
class MyApp < Sinatra::Base
# stuff
end
As my original answer was quite old but there seems to be still attention to this topic here's the latest version of bundler/sinatra setup which will cover most of the use case:
A minimal config.ru
require './my_sinatra_app'
run MySinatraApp
An environment env.rb file that requires all the bundled gems (also supports loading the current environment's group):
require 'bundler/setup'
APP_ENV = ENV["RACK_ENV"] || "development"
Bundler.require :default, APP_ENV.to_sym
Then your app file (requiring the environment) with your sinatra app (Sinatra::Base):
require_relative 'env'
class MyApp < Sinatra::Base
get "/" do
"hello world"
end
end
Start your development server with rackup, and Sinatra will be loaded via Bundler, your app will be accessible from http://localhost:9292.
$ rackup
or bundle exec rackup if needed
Make sure you have a Gemfile like the following one and you run the bundle command before starting the app
source "https://rubygems.org"
gem "sinatra"
gem "puma" # a better rack server than the default webrick
+1 for the guide on the bundler website, but if you have a simple app and use Sinatra's dsl at the top level, then you need to do the following:
in your Gemfile (tell bundler not require sinatra):
gem 'sinatra', :require => false
and in the app's file (explicitly require sinatra):
require 'rubygems'
require 'bundler'
Bundler.require
require 'sinatra'
get '/' do
'hello world'
end
To use bundler with a Sinatra application, you only need to do two things. First, create a Gemfile.
gem 'sinatra'
Then, set up your config.ru file to load the bundle before it loads your Sinatra app.
require 'rubygems'
require 'bundler'
Bundler.require
require './my_sinatra_app'
run MySinatraApp
Start your development server with rackup, and Sinatra will be loaded via Bundler.
rackup
source bundler docs