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Bug in tutorial: syntax error, unexpected ':', expecting keyword_end
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Closed 7 years ago.
I am following the getting started tutorial here:
http://guides.rubyonrails.org/getting_started.html
I am finding routes quite confusing:
We still need a way to list all our posts, so let's do that. We'll use a specific route from config/routes.rb:
posts GET /posts(.:format) posts#index
When adding this to my routes.rb file, I encounter an error
SyntaxError
/Users/example/blog/config/routes.rb:12: syntax error, unexpected ':', expecting keyword_end #get 'posts/:format' => 'posts#index' ^ /Users/thoad/blog/config/routes.rb:12: syntax error, unexpected tIDENTIFIER, expecting keyword_end #get 'posts/:format' => 'posts#index' ^
When I just omit the line altogether, everything works fine...
So... why do I need that line, and could someone explain the structure of it to me please?
This is not a line you have to add to config/routes.rb. This line comes from running the following command: rake routes. The line means that action index in controller posts is responsible for handling the path /posts. The next step of the guide is creating said action. In your controllers and views, you can use posts_path in order to redirect to this specific path or link to it. Hope this helps.
I must say that bit of the documentation is a little misleading, but jump back a few steps in the documentation to 5 Getting up and running and you'll find the code
Blog::Application.routes.draw do
resources :posts
root to: "welcome#index"
end
This is what you should have in your routes.rb file, and it's what is responsible for producing the output that you have in your question.
If you put that into your routes.rb file, and then in a console, run rake routes you'll get the output
posts GET /posts(.:format) posts#index
POST /posts(.:format) posts#create
new_post GET /posts/new(.:format) posts#new
edit_post GET /posts/:id/edit(.:format) posts#edit
post GET /posts/:id(.:format) posts#show
PATCH /posts/:id(.:format) posts#update
PUT /posts/:id(.:format) posts#update
DELETE /posts/:id(.:format) posts#destroy
root / welcome#index
Notice that in that output, the first line is what is in your question. The routing system is pretty complex in Rails, so don't get too overwhelmed now. For now, stick with the very basics.
If you want to add routes to Create, Read, Update, andDeletea record, then you want to use theresources` method in your routes file, as shown above. This will automatically create 8 routes for you. Rails will automatically associate it with the appropriate controller as well so you must make sure you name things correctly.
Related
I have created one controller and added default 7 action methods , I have also created 4 views and those are index , new , show , edit all contains difeent data
also added resources :posts controller configuration into my routing file as well
'
My problem is when i try to navigate to index or edit views using url .. it displays me only show views , however index method is working as a default
below are my urls `enter code here`
1 . http://localhost:3000/posts/index[^]
if i try this it gives me show view data
localhost:3000/posts
this gives me proper index data (default without mentioning index action name)
http://localhost:3000/posts/edit[^]
this one but always shows me data present in show view and not in data present in edit view
Please suggest
Below are few lines from my route file.
Hide Copy Code
Rails.application.routes.draw do
get 'home/index'
resources :posts
# The priority is based upon order of creation: first created -> highest priority.
# See how all your routes lay out with "rake routes".
# You can have the root of your site routed with "root"
root 'home#index'
Please read the Rails guide entry on default resource routing, there's nothing unusual going on here.
/posts is how you access your posts#index, not /posts/index.
For show and edit, you need your post id in the URL so that Rails knows which record to retrieve, ie /posts/1/edit
You can run rake routes from the console to see all of your routes. The result of resources :posts should be the following seven routes:
Prefix Verb URI Pattern Controller#Action
POST /posts(.:format) posts#create
new_sheet GET /posts/new(.:format) posts#new
edit_sheet GET /posts/:id/edit(.:format) posts#edit
sheet GET /posts/:id(.:format) posts#show
PATCH /posts/:id(.:format) posts#update
PUT /posts/:id(.:format) posts#update
DELETE /posts/:id(.:format) posts#destroy
Rails will match the URL to the URI pattern and take the matching controller action. btw you can use rake routes CONTROLLER=posts to see just the routes for posts.
I need a little bit of help on RESTful routing. Basically, im trying to recreate http://medium.com to help improve my skills in rails.
I have the registration done via Devise.
Im stuck at the actual blog routing. I want the routes to be something like this: domain.com/username/post-title. Im not sure if it is possible to make this kind of app follow the restful pattern.
How would I do it?
I was thinking of doing something like this:
scope module: :username do
resources :posts
end
but when I rake routes, I just get something weird:
posts GET /posts(.:format) username/posts#index
POST /posts(.:format) username/posts#create
new_post GET /posts/new(.:format) username/posts#new
edit_post GET /posts/:id/edit(.:format) username/posts#edit
post GET /posts/:id(.:format) username/posts#show
PATCH /posts/:id(.:format) username/posts#update
PUT /posts/:id(.:format) username/posts#update
DELETE /posts/:id(.:format) username/posts#destroy
root GET / home#index
The url for these routes still stay /posts and for some reason arent :username/posts.
I really dont know how to apprach this.
Thanks! :)
That is because you are using 'scope'. Try using 'namespace' instead if you want the module name in your url
namespace :username do
resources :posts
end
I'm trying to follow this guide:
http://guides.rubyonrails.org/getting_started.html#hello-rails-bang
and in section 5.7 it says to add this line.
post GET /posts/:id(.:format) posts#show
What does this do, and where should I put it? I tried putting it in the "create" method that follows this form:
http://dixonc3-72812.use1.nitrousbox.com/posts/new
I also tried putting it in the "view" because I figured it was accepting the "POST" method. How do I proceed? New to Ruby on Rails and trying to figure out the kinks.
I'm trying to follow this guide:
http://guides.rubyonrails.org/getting_started.html#hello-rails-bang
and in section 5.7 it says to add this line.
post GET /posts/:id(.:format) posts#show
Section 5.7 doesn't tell you that. What it tells you is the following is output of rake routes for the show action:
post GET /posts/:id(.:format) posts#show
The output is presented in a tabular format where the four columns are (from left to right): Prefix, Verb, URI Pattern, Controller#Action.
In order to get this, you need to declare posts as a resource in config/routes.rb as:
resources :posts, only: [:show]
Now if you run rake routes in your terminal, you will see the line included from the guide.
The above line in config/routes.rb defines a route for the show action. You can remove only: [ :show ] option to have routes defined for all standard RESTful actions, i.e. in your config/routes.rb:
resources :posts
This is the routes for show action of posts controller, for create action you find something like
posts#create
I am completely new to ruby, andI am following this ruby rails tutorial step by step, except for the detail that I've called my app "cinema".
I created a resource named "posts", there is a controller class called posts controller. From the page posts/new I should post a text with title, and execute an action (show). I am trying to add the show action in the routes file and in the controller class.
The show action should be called when a form is submitted, the form includes a title and a text field, mapped into the database.
In paragraph 5.7, there is a non-clear instruction: it says to add this line:
post GET /posts/:id(.:format) posts#show
To my routes.rb file, but it doesn't say where to write it exactly, I put it under resources:posts (maybe it's the wrong place, it doesn't saying anything about that).
I also added the show method to the controller class:
def show
#post = Post.find(params[:id])
end
private
def post_params
params.require(:post).permit(:title,:test);
end
But when I submit the form I still get this error:
The rake routes command result:
Prefix Verb URI Pattern Controller#Action
welcome_index GET /welcome/index(.:format) welcome#index
root GET / welcome#index
posts GET /posts(.:format) posts#index
POST /posts(.:format) posts#create
new_post GET /posts/new(.:format) posts#new
edit_post GET /posts/:id/edit(.:format) posts#edit
post GET /posts/:id(.:format) posts#show
PATCH /posts/:id(.:format) posts#update
PUT /posts/:id(.:format) posts#update
DELETE /posts/:id(.:format) posts#destroy
It doesn't tell you to add it to routes.rb. It's one of the routes that is created automatically with:
resources :posts
Remove the line from your routes.rb restart the server and continue with the tutorial.
Tip: you can run rake routes to see all available routes in your application.
Your whole question seems completely contradictory to me.
You never do this in rails routes -
post GET /posts/:id(.:format) posts#show
Instead in routes.rb file.
get 'posts/:id' => 'posts#show'
The routing is done on a priority basis (first come first serve), so if your are adding get 'posts/:id' after the resources :posts, it is of no use as resources :posts already does it for you (read the rails routing guide on resources).
Your form submission should be a post data, if you are using resources 'new' should be a 'get' data and the corresponding 'post' should be 'create'. Your 'new' route has an error, then where else are you rendering your form to submit the form data?
My suggestion is that you keep the 'resources :post' and remove every other this corresponding to your :post from routes file. If you have everything else right then it should probably work fine.
resources :posts
delete it
rails s
paste resources :posts
rails s
I make it and success
I'm new to Linux/Ruby/Rails, so I'm trying to learn by doing the Getting Started with Rails tutorial. In section 5.7, it doesn't specifically say what to do with this line:
post GET /posts/:id(.:format) posts#show
I assume I am to put this in the routes.rb file? I did, but then I get this when I try to GET any of the controller actions:
SyntaxError
/.../blog/config/routes.rb:9: syntax error, unexpected ':', expecting keyword_end post GET /posts/:id(.:format) posts#show ^
Being such a newbie, I have no idea what I should do at this point. What is the error on this line?
Thanks,
James
You do not put the following in the config/routes.rb file.
post GET /posts/:id(.:format) posts#show
This is the result of a route entry, which is what you'd put in your routes.rb file. E.g.
get 'posts/:id', to: "posts#show"
Here get is the HTTP method, posts/:id is the path pattern, and the to: "posts#show" is the name of the controller and action. So, when this pattern is encountered, Rails is going to execute show action in PostsController.
Recommend a read on "Rails Routing from the Outside In".