CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-4
Aditya Naidu
Aditya Naidu

Reputation: 697

How does a controller in ruby on rails get id by using params[:id]

I am working on creating a basic blog using ruby on rails. I am new to it. I have two controllers named category and post_controller. Both have a show function as shown:

for category controller:

Category.find(params[:id])

for post_controller

Post.find(params[:id])

When I enter the url 

"localhost:3000/post_controller/2

It displays the posts with id 2. But when I do the same thing for the category controller:

"localhost:3000/categories/2

It shows an error saying

No route matches [GET] "/categories/1"
Rails.root: /home/root/myFirstBlog

And yes ofcourse, I have an element in my categories database with id 2. However when I use this url:

"localhost:3000/categories/show?id=2

It works obviously but what is the difference between the two controllers even though they have identical code.

P.S. I am confused as to what information will be relevant so please let me know in the comments. I will edit my question as required.

Rails.application.routes.draw do

  get 'categories/index'
  get 'categories'=>'categories#index'
  get 'categories/edit'
  get 'categories/new'
  get 'home/index'
  get 'post_controller/edit'
  get 'post_controller/index'
  get 'categories/edit'
  get 'categories/index'
  get 'categories/new'
  get 'categories/show'
  resources :category
  resources :post_controller
  root 'post_controller#index'
end

Upvotes: 1

Views: 1380

Answers (2)

DickieBoy
DickieBoy

Reputation: 4956

First: The resources :thing should be pluralised

resources :things adds these routes.

So no need for all the get 'categories/*' in your routes file.

Im not sure what post_controller is either. Should probably be renamed to. resources :posts

These things are probably why you are seeing inconsistencies. Without delving into it too deep its hard to say exactly whats going on.

Your routes file should look something like:

Rails.application.routes.draw do
  resources :category # handles actions for all categories CRUD
  resources :posts  # handles actions for all posts CRUD
  root 'post_controller#index' #root view. i.e. "/"
end

Upvotes: 1

gyohannes
gyohannes

Reputation: 101

It seems you misspelled the the controller in the URL. If your controller is categories localhost:3000/categories/2 should work.

Upvotes: 0

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