Here is my code , but 'namespace' is not taking , If I write without namespace it is working , also it will work with 'namespace' if I remove class declaration and execute directly .
require 'sinatra'
require 'sinatra/namespace'
class MyApp < Sinatra::Base
namespace "/v1" do
get "/" do
"Hello World!"
end
end
end
1: from test1.rb:4:in <main>'
test1.rb:5:in': undefined method `namespace' for MyApp:Class (NoMethodError)
Based on the Sinatra documentation you need to register the extension:
require 'sinatra'
require 'sinatra/namespace'
class MyApp < Sinatra::Base
register Sinatra::Namespace
namespace "/v1" do
get "/" do
"Hello World!"
end
end
end
Related
I have this helper within my 'app.rb' file, which is used to get the current user object.
helpers do
def get_current_user(column, value)
user = User.where(column => value).first
return user
end
end
get '/' do
user = get_current_user(:id, params[:id])
end
This is what i did in irb:
irb(main):001:0> require './app'
=> true
irb(main):007:0> user = get_current_user(:id, 2)
NoMethodError: undefined method `get_current_user' for main:Object
from (irb):7
from /usr/bin/irb:12:in `<main>'
I don't understand why i can't access the helper methods from irb. Should i explicitly include the helpers or something? If so, why? Because i put them under the same file, under the same class.
get_current_users is metaprogrammed through the helpers method to be an instance method of App. So, if app.rb looks something like this:
require 'sinatra/base'
class App < Sinatra::Base
helpers do
def get_current_user
puts "here!"
end
end
end
...then from irb you can invoke get_current_user on an instance of App like this:
>> require './app'
>> App.new!.get_current_user
here!
=> nil
>>
(If you're wondering why that's new! and not new like most sane ruby code, read this answer.)
This is my first attempt with Sinatra. I built a simple classic app, set up RSpec for it, and got it working. Then, I tried to go modular, in a MVC fashion. Even though the app works in the browser, RSpec throws a NoMethodError. I've read Sinatra docs regarding RSpec, also searched a lot here in SO, but I can't find where the bug is. Any clue?
Thank you very much in advance.
Here are my relevant files:
config.ru
require 'sinatra/base'
Dir.glob('./{app/controllers}/*.rb') { |file| require file }
map('/') { run ApplicationController }
app.rb
require 'sinatra/base'
class ZerifApp < Sinatra::Base
# Only start the server if this file has been
# executed directly
run! if __FILE__ == $0
end
app/controllers/application_controller.rb
class ApplicationController < Sinatra::Base
set :views, File.expand_path('../../views', __FILE__)
set :public_dir, File.expand_path('../../../public', __FILE__)
get '/' do
erb :index
end
end
spec/spec_helper.rb
require 'rack/test'
# Also tried this
# Rack::Builder.parse_file(File.expand_path('../../config.ru', __FILE__))
require File.expand_path '../../app.rb', __FILE__
ENV['RACK_ENV'] = 'test'
module RSpecMixin
include Rack::Test::Methods
def app() described_class end
end
RSpec.configure { |c| c.include RSpecMixin }
spec/app_spec.rb
require File.expand_path '../spec_helper.rb', __FILE__
describe "My Sinatra Application" do
it "should allow accessing the home page" do
get '/'
expect(last_response).to be_ok
end
end
The error
My Sinatra Application should allow accessing the home page
Failure/Error: get '/'
NoMethodError:
undefined method `call' for nil:NilClass
# ./spec/app_spec.rb:5:in `block (2 levels) in <top (required)>'
I'm guessing you're following this recipe, correct?
The described_class in this line:
def app() described_class end
is meant to be the class under test, in this case ZerifApp. Try it like so:
def app() ZerifApp end
EDIT
It turns out the above answer is not correct about what described_class does. I assumed it was a placeholder -- actually it is an RSpec method that returns the class of the implicit subject, that is to say, the thing being tested.
The recipe at the link is misleading because of the way it recommends writing the describe block:
describe "My Sinatra Application" do
This is valid RSpec, but it does not define the subject class. Executing described_class in an example for this block will return nil. To make it work, replace the describe block:
describe ZerifApp do
Now described_class will return the expected value (ZerifApp)
https://pragprog.com/book/7web/seven-web-frameworks-in-seven-weeks
It has some source code to get some ideas from.
This has code example too. https://github.com/laser/sinatra-best-practices
What I want to do is using an alias method (defined in a ruby file) in Haml view.
I defined an alias method like following:
require 'sinatra'
require 'sinatra/base'
require 'data_mapper'
require 'haml'
helpers do
include Haml::Helpers
alias_method :h, :html_escape
end
class App < Sinatra::Base
use Rack::MethodOverride
# ...
end
Then I used method h() in a Haml view like following:
- #notes.each do |note|
%article{:class => note.complete? && "complete"}
%p
=h note.content
But I got an error when I opened the page:
NoMethodError - undefined method `h' for #:
...
When I use Haml::Helpers.html_escape() directly on the haml file, there's no problem:
%p
= Haml::Helpers.html_escape note.content
How can I use my alias method in haml files without errors?
Thanks for any advices or corrections to this questions.
Your helpers are getting defined in Application. Instead define them in your class like this:
class App < Sinatra::Base
helpers do
include Haml::Helpers
alias_method :h, :html_escape
end
# ...
end
or in Base like this:
Sinatra::Base.helpers do
include Haml::Helpers
alias_method :h, :html_escape
end
app.rb:
require 'sinatra'
class MyApp < Sinatra::Application
enable :sessions
if session[:user_id].nil? then
erb :login
end
end
require_relative 'routes/init.rb'
config.ru:
require './app'
run MyApp
Running shotgun config.ru or thin start -R config.ru yields:
app.rb:3:in `<top (required)>': undefined local variable or method `session' for main:Object (NameError)
This is very 101ish. What gives?
I believe the problem is that you don't have that code within a get block or something similar. Basically, sinatra will only know about the session object in the context of a request. Something like this would work for the root url:
require 'sinatra'
class MyApp < Sinatra::Application
enable :sessions
get '/' do
if session[:user_id].nil? then
erb :login
end
end
end
I found nothing about how I can mix-in routes from another module, like this:
module otherRoutes
get "/route1" do
end
end
class Server < Sinatra::Base
include otherRoutes
get "/" do
#do something
end
end
Is that possible?
You don't do include with Sinatra. You use extensions together with register.
I.e. build your module in a separate file:
require 'sinatra/base'
module Sinatra
module OtherRoutes
def self.registered(app)
app.get "/route1" do
...
end
end
end
register OtherRoutes # for non modular apps, just include this file and it will register
end
And then register:
class Server < Sinatra::Base
register Sinatra::OtherRoutes
...
end
It's not really clear from the docs that this is the way to go for non-basic Sinatra apps. Hope it helps others.
You could do this:
module OtherRoutes
def self.included( app )
app.get "/route1" do
...
end
end
end
class Server < Sinatra::Base
include OtherRoutes
...
end
Unlike Ramaze, Sinatra's routes are not methods, and so cannot use Ruby's method lookup chaining directly. Note that with this you can't later monkey-patch OtherRoutes and have the changes reflected in Server; this is just a one-time convenience for defining the routes.
I prefer the use of sinatra-contrib gem to extend sinatra for cleaner syntax and shared namespace
# Gemfile
gem 'sinatra', '~> 1.4.7'
gem 'sinatra-contrib', '~> 1.4.6', require: 'sinatra/extension'
# other_routes.rb
module Foo
module OtherRoutes
extend Sinatra::Extension
get '/some-other-route' do
'some other route'
end
end
end
# app.rb
module Foo
class BaseRoutes < Sinatra::Base
get '/' do
'base route'
end
register OtherRoutes
end
end
sinata-contrib is maintained alongside the sinatra project
Well you can also use the map method to map routes to your sinatra apps
map "/" do
run Rack::Directory.new("./public")
end
map '/posts' do
run PostsApp.new
end
map '/comments' do
run CommentsApp.new
end
map '/users' do
run UserssApp.new
end
Just my two cents:
my_app.rb:
require 'sinatra/base'
class MyApp < Sinatra::Base
set :root, File.expand_path('../', __FILE__)
set :app_file, __FILE__
disable :run
files_to_require = [
"#{root}/app/helpers/**/*.{rb}",
"#{root}/app/routes/**/*.{rb}"
]
files_to_require.each {|path| Dir.glob(path, &method(:require))}
helpers App::Helpers
end
app/routes/health.rb:
MyApp.configure do |c|
c.before do
content_type "application/json"
end
c.get "/health" do
{ Ruby: "#{RUBY_VERSION}",
Rack: "#{Rack::VERSION}",
Sinatra: "#{Sinatra::VERSION}"
}.to_json
end
end
app/helpers/application.rb:
module App
module Helpers
def t(*args)
::I18n::t(*args)
end
def h(text)
Rack::Utils.escape_html(text)
end
end
end
config.ru:
require './my_app.rb'