Here's my routes file
Dumb::Application.routes.draw do
# an auto-named route
get '/a/b', to: 'a#b'
# apparently not auto-named???
get '/a/z/:something', to: 'a#z'
end
Here's output of rake routes
a_b GET /a/b(.:format) a#b
GET /a/z/:something(.:format) a#z
Wow that sucks! At least for consistency's sake. If I change the a#z route to
get '/a/z/:something', to: 'a#z', as: "a_z"
rake routes will display
a_b GET /a/b(.:format) a#b
a_z GET /a/z/:something(.:format) a#z
Ok that's good, but having to name the route like that is annoying.
Is this the only solution?
My guess is that Rails can't assign a name to your route because it does not understand it. Usually, you will want to write your route as such :
/a/:id/b/:id # instead of /a/b/:id which Rails does not understand.
Rails maps a to a controller with a model instance with id :id and b to another controller with another model instance with id :id.
/a/b/:id does not refer to anything in terms of Rails convention.
Getting GET /a/b named to a_b was just a guess Rails made, but it can't work out GET /a/z/:something. What would it be? a_z_something?
Related
I am trying to learn about namespacing.
I've asked a few questions on this topic previously, but I'm not understanding what is going on.
I have made a folder in my controller's folder called 'features'. In it, I have saved a file called app_roles_controller.rb.
The first line of that controller is:
class Features::AppRolesController < ApplicationController
The purpose of the features folder is so I can organise my files better (that's it).
In my routes.rb, I have tried:
resources :app_roles, :namespace => "features", :controller => "app_roles"
I have also tried:
namespace :features do
resources :app_roles
end
I have a model (top level) called app_role.rb and I have a views folder saved as views/features/app_roles which then has the index, show etc files in it. The table in my schema is called 'app_roles".
When I rake routes for app_roles, I get:
Paths Containing (app_role):
app_roles_path GET /app_roles(.:format)
app_roles#index {:namespace=>"features"}
POST /app_roles(.:format)
app_roles#create {:namespace=>"features"}
new_app_role_path GET /app_roles/new(.:format)
app_roles#new {:namespace=>"features"}
edit_app_role_path GET /app_roles/:id/edit(.:format)
app_roles#edit {:namespace=>"features"}
app_role_path GET /app_roles/:id(.:format)
app_roles#show {:namespace=>"features"}
PATCH /app_roles/:id(.:format)
app_roles#update {:namespace=>"features"}
PUT /app_roles/:id(.:format)
app_roles#update {:namespace=>"features"}
DELETE /app_roles/:id(.:format)
app_roles#destroy {:namespace=>"features"}
I can't understand what it is that I'm doing wrong.
When I try:
http://localhost:3000/app_roles#index
I get an error that says:
uninitialized constant AppRolesController
When I try:
http://localhost:3000/features/app_roles#index
I get an error that says:
No route matches [GET] "/features/app_roles"
I'm looking for a plain English explanation of how to set this up. I've tried the programming ruby book (several times over).
Please, can you help me understand what needs to happen to introduce organisational files in my rails app?
It looks like your other attempt was actually correct. As outlined in the Rails documentation, if you want to generate routes for the resource app_roles under the namespace features you can add the following to your routes.rb file:
namespace :features do
resources :app_roles
end
Now, you run rake routes you will see the following:
Prefix Verb URI Pattern Controller#Action
features_app_roles GET /features/app_roles(.:format) features/app_roles#index
POST /features/app_roles(.:format) features/app_roles#create
new_features_app_role GET /features/app_roles/new(.:format) features/app_roles#new
edit_features_app_role GET /features/app_roles/:id/edit(.:format) features/app_roles#edit
features_app_role GET /features/app_roles/:id(.:format) features/app_roles#show
PATCH /features/app_roles/:id(.:format) features/app_roles#update
PUT /features/app_roles/:id(.:format) features/app_roles#update
DELETE /features/app_roles/:id(.:format) features/app_roles#destroy
The first line for example means that if you make a GET request to /features/app_roles it will be routed to the index action in the features/app_roles controller.
In other words, if you visit http://localhost:3000/features/app_roles it will route the request to index action that is located in app/controllers/features/app_roles_controller.rb which it expects to have the class Features::AppRolesController.
So your app/controllers/features/app_roles_controller.rb file should look something like this:
class Features::AppRolesController < ApplicationController
def index
end
end
I'm trying to get a quick-and-dirty Ajax UI going for an app that already has its data model well in hand - it's basically been managed via rails console so far. Anyway, I thought I would start by auto-generating the missing controller logic that you would get from a rails g scaffold, only instead with rails g scaffold_controller for an existing controller.
It created the controller, and the views, and the assets.. but it didn't touch the routes at all! It didn't even try, didn't say "warning: routes.rb has been modified, not changing" or anything like that, and there's no mention of routes at all in the help output of rails g scaffold_controller.
So how do I say "Just give me the normal routes you would have given me if I started from scratch, please!"?
If I understand the question:
Please, open the config/routes.rb file, and inside the block (routes.draw) add the resources method with the table name (plural of model) as param. Like this:
MyApp::Application.routes.draw do
resources :products
... # rest of code
end
That define the routes for RESTful actions over products. You can read more here
At the console you can run: rake routes to see the available routes at your app.
Although this is asking about Rails 4 for long time ago, but with Rails 5, rails g scaffold_controller still won't auto-generate route, I did it with below monkey patch:
require 'rails/generators/rails/scaffold_controller/scaffold_controller_generator'
patcher = Module.new do
extend ActiveSupport::Concern
included do
hook_for :resource_route, required: true
end
end
Rails::Generators::ScaffoldControllerGenerator.send :include, patcher
I have to modify the routes file in order to have SEO improvement.
This is my context, a rails backend generate a JSON feed with the route's name in, I have to read it and change the default name.
For example, I have this:
get '/people' => 'people#show', as: :people
and I'd like to change /people in some value read from my JSON feed.
I created a class to get the JSON object in my app
class JSONDatabase
def initialize(kind_of_site)
#kind_of_site = kind_of_site
end
def fetch_database_remote(url)
JSON.parse(open(url).read)
end
end
but how can i access it in routes file?
Thank you
You don't necessarily need to modify your application's routes. What you can do is define a wild card route that leads to a unique controller where you read the updated route. This approach is kind of hackish but gives you the unlimited routes you need without modifying the routes.
Your config/routes.rb file would look something like this:
resources :defined_models
root to: 'controller#action'
# At last we define the wildcard route
get '/:route' => 'routing_controller#routing_action'
Then, at this routing action we can do the job of seeing if this route (now defined in the params[:route] variable) corresponds to the modified one. Just remember to redirect to a 404 if the route given is not defined, since with this approach you loose the Rails default way of dealing with undefined routes.
I'm trying to get a simple route working
/agenda_items/5/feed
To do this, I have the following route setup
resources :agenda_items do
member do
get "/feed", to: "comments#feed"
end
end
In each of my controllers, I'm using CanCan to handle the authentication and it works fine, however on this one action I'm having an issue, which I'm pretty sure is down to railsnaming generation. When I runrake routes`, the route above is produced as
feed_agenda_item /agenda_items/:id/feed(.:format) agenda_items/:id#feed
As far as I can tell, CanCan is expecting the :id parameter, to actually be :agenda_item_id so as a result, my parent resource isn't being loaded.
Is there any way I can get rails to change this so that CanCan will work without me having to manually load and authorize the resource, or is there a way I can get CanCan to change what it's looking for on certain actions?
The problem is that your routes are wrong. You try to create a member action for agenda items which routes to the comments controller. If you want a feed of all the commments from a single agenda item you should do something like this:
resources :agenda_items do
resources :comments do
collection do
get :feed
end
end
end
You should now get the following when running rake routes:
feed_agenda_item_comments /agenda_items/:agenda_item_id/feed(.:format) comments#feed
I have a community_users model that I route in the following way:
resources :communities do
resources :users
end
This creates the route /communities/:id/users/.
I'd like to configure this route so that only the name of the community with the corresponding :id is shown.
In other words, if a community has an id of '1' and the name 'rails-lovers' - the route would read:
/rails-lovers
and not:
/communities/1/users/
You might want to check out the gem friendly_id
That will give you the clean URLs you are looking for.
I'm not quite sure if this is what you're looking for, but:
One option would be to create the route
match ':community_name' => 'users#show_users_for_community'
and then in the UsersController have
def show_users_for_community
#community = Community.find_by_name(params[:community_name])
<do what you need to do here>
end
I'm not sure if that route will match too many URLs or not -- it's a very general route. So if you do this, maybe put it low down in your routes file.