NoMethodError in ArticlesController#create - ruby-on-rails

Question

So I am trying to follow the tutorial here: http://guides.rubyonrails.org/getting_started.html
And I have some idea as to what's happening, but at this point I am becoming exponentially more upset and unequipped to look at this in a way that makes sense.here is my controller currently. it's very simple and I thought I knew what was going on:
articles_controller.rb
class ArticlesController < ApplicationController
def new
end
def create
#article = Article.new(article_params)
#article.save
redirect_to #article
end
private
def article_params
params.require(:article).permit(:title, :text)
end
end
routes.rb
Rails.application.routes.draw do
get 'welcome/index'
Rails.application.routes.draw do
resource :articles
root 'welcome#index'
end
end
But I am now out of my depth and can no longer proceed. If it makes a difference I am running windows 8 pro. Any help would be appreciated. I can tell the error has something to do with 'redirect_to' but I don't know anything outside of that!
My error now looks like:
NoMethodError in ArticlesController#create
undefined method `article_url' for #<ArticlesController:0x979bfc0>
Extracted source (around line #0):
app/controllers/articles_controller.rb:9:in `create'
And the stack trace looks like this:
actionpack (4.2.0) lib/action_dispatch/routing/polymorphic_routes.rb:268:in `handle_model_call'
actionpack (4.2.0) lib/action_dispatch/routing/url_for.rb:167:in `url_for'
actionpack (4.2.0) lib/action_controller/metal/redirecting.rb:95:in `_compute_redirect_to_location'
turbolinks (2.5.3) lib/turbolinks/xhr_headers.rb:21:in `_compute_redirect_to_location'
actionpack (4.2.0) lib/action_controller/metal/redirecting.rb:75:in `redirect_to'
actionpack (4.2.0) lib/action_controller/metal/flash.rb:57:in `redirect_to'
actionpack (4.2.0) lib/action_controller/metal/instrumentation.rb:61:in `block in redirect_to'
activesupport (4.2.0) lib/active_support/notifications.rb:164:in `block in instrument'
activesupport (4.2.0) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (4.2.0) lib/active_support/notifications.rb:164:in `instrument'
actionpack (4.2.0) lib/action_controller/metal/instrumentation.rb:60:in `redirect_to'
app/controllers/articles_controller.rb:9:in `create'
actionpack (4.2.0) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
actionpack (4.2.0) lib/abstract_controller/base.rb:198:in `process_action'
actionpack (4.2.0) lib/action_controller/metal/rendering.rb:10:in `process_action'
actionpack (4.2.0) lib/abstract_controller/callbacks.rb:20:in `block in process_action'
activesupport (4.2.0) lib/active_support/callbacks.rb:117:in `call'
activesupport (4.2.0) lib/active_support/callbacks.rb:117:in `call'
activesupport (4.2.0) lib/active_support/callbacks.rb:234:in `block in halting'
activesupport (4.2.0) lib/active_support/callbacks.rb:234:in `call'
activesupport (4.2.0) lib/active_support/callbacks.rb:234:in `block in halting'
activesupport (4.2.0) lib/active_support/callbacks.rb:169:in `call'
activesupport (4.2.0) lib/active_support/callbacks.rb:169:in `block in halting'
activesupport (4.2.0) lib/active_support/callbacks.rb:169:in `call'
activesupport (4.2.0) lib/active_support/callbacks.rb:169:in `block in halting'
activesupport (4.2.0) lib/active_support/callbacks.rb:234:in `call'
activesupport (4.2.0) lib/active_support/callbacks.rb:234:in `block in halting'
activesupport (4.2.0) lib/active_support/callbacks.rb:169:in `call'
activesupport (4.2.0) lib/active_support/callbacks.rb:169:in `block in halting'
activesupport (4.2.0) lib/active_support/callbacks.rb:92:in `call'
activesupport (4.2.0) lib/active_support/callbacks.rb:92:in `_run_callbacks'
activesupport (4.2.0) lib/active_support/callbacks.rb:734:in `_run_process_action_callbacks'
activesupport (4.2.0) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (4.2.0) lib/abstract_controller/callbacks.rb:19:in `process_action'
actionpack (4.2.0) lib/action_controller/metal/rescue.rb:29:in `process_action'
actionpack (4.2.0) lib/action_controller/metal/instrumentation.rb:31:in `block in process_action'
activesupport (4.2.0) lib/active_support/notifications.rb:164:in `block in instrument'
activesupport (4.2.0) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
activesupport (4.2.0) lib/active_support/notifications.rb:164:in `instrument'
actionpack (4.2.0) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
actionpack (4.2.0) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
activerecord (4.2.0) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
actionpack (4.2.0) lib/abstract_controller/base.rb:137:in `process'
actionview (4.2.0) lib/action_view/rendering.rb:30:in `process'
actionpack (4.2.0) lib/action_controller/metal.rb:195:in `dispatch'
actionpack (4.2.0) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
actionpack (4.2.0) lib/action_controller/metal.rb:236:in `block in action'
actionpack (4.2.0) lib/action_dispatch/routing/route_set.rb:73:in `call'
actionpack (4.2.0) lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
actionpack (4.2.0) lib/action_dispatch/routing/route_set.rb:42:in `serve'
actionpack (4.2.0) lib/action_dispatch/journey/router.rb:43:in `block in serve'
actionpack (4.2.0) lib/action_dispatch/journey/router.rb:30:in `each'
actionpack (4.2.0) lib/action_dispatch/journey/router.rb:30:in `serve'
actionpack (4.2.0) lib/action_dispatch/routing/route_set.rb:802:in `call'
rack (1.6.0) lib/rack/etag.rb:24:in `call'
rack (1.6.0) lib/rack/conditionalget.rb:38:in `call'
rack (1.6.0) lib/rack/head.rb:13:in `call'
actionpack (4.2.0) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
actionpack (4.2.0) lib/action_dispatch/middleware/flash.rb:260:in `call'
rack (1.6.0) lib/rack/session/abstract/id.rb:225:in `context'
rack (1.6.0) lib/rack/session/abstract/id.rb:220:in `call'
actionpack (4.2.0) lib/action_dispatch/middleware/cookies.rb:560:in `call'
activerecord (4.2.0) lib/active_record/query_cache.rb:36:in `call'
activerecord (4.2.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:647:in `call'
activerecord (4.2.0) lib/active_record/migration.rb:378:in `call'
actionpack (4.2.0) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
activesupport (4.2.0) lib/active_support/callbacks.rb:88:in `call'
activesupport (4.2.0) lib/active_support/callbacks.rb:88:in `_run_callbacks'
activesupport (4.2.0) lib/active_support/callbacks.rb:734:in `_run_call_callbacks'
activesupport (4.2.0) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (4.2.0) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (4.2.0) lib/action_dispatch/middleware/reloader.rb:73:in `call'
actionpack (4.2.0) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
web-console (2.0.0) lib/action_dispatch/debug_exceptions.rb:18:in `middleware_call'
web-console (2.0.0) lib/action_dispatch/debug_exceptions.rb:13:in `call'
actionpack (4.2.0) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
railties (4.2.0) lib/rails/rack/logger.rb:38:in `call_app'
railties (4.2.0) lib/rails/rack/logger.rb:20:in `block in call'
activesupport (4.2.0) lib/active_support/tagged_logging.rb:68:in `block in tagged'
activesupport (4.2.0) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (4.2.0) lib/active_support/tagged_logging.rb:68:in `tagged'
railties (4.2.0) lib/rails/rack/logger.rb:20:in `call'
actionpack (4.2.0) lib/action_dispatch/middleware/request_id.rb:21:in `call'
rack (1.6.0) lib/rack/methodoverride.rb:22:in `call'
rack (1.6.0) lib/rack/runtime.rb:18:in `call'
activesupport (4.2.0) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
rack (1.6.0) lib/rack/lock.rb:17:in `call'
actionpack (4.2.0) lib/action_dispatch/middleware/static.rb:113:in `call'

Answer 1

Basically the "undefined method `article_url' for " means that rails can't find an appropriate route for the #article record. When defining a route, rails generates two methods ending in _url and _path. You can use them in your application to access the respective urls without hardcoding them. Looking at the code in your routes.rb file, I have found three things:
You only need one call to Rails.application.routes.draw
The key word for generating the CRUD routes for a model is "resources" (plural), not "resource" (singular)
(Not concerning the error) Your "get 'welcome/index'" looks not finished. Maybe you meant something line "get '/index', to: 'welcome#index'". The first string specifies the url path, the to specifies the controller#action.
Try with the following routes.rb:
Rails.application.routes.draw do
resources :articles
root 'welcome#index'
end
I recommend that you also go through the routing guide while you are at it. Good luck!

Answer 2

Ah you see, the problem is that you used the singular resource word, not the resources (note the s), in your case you should be using resources, because you have multiple articles
More about resources, and resource

Answer 3

You are redirecting to the #article show page after creating article but you don't have this method defined in your ArticlesController. You have to define that method and create a view for it. Also, what are your routes?

Answer 4

This is one hard code that implement resource work
You can pass json object to redirect_to
class ArticlesController < ApplicationController
def show
#article = Article.find(params[:id])
end
def new
end
def create
#article = Article.new(article_params)
#article.save
redirect_to articles_path({:id => #article.id})
end
private
def article_params
params.require(:article).permit(:title, :text)
end
end