No route matches [POST] "/companyrating/index" - ruby-on-rails

Question

I am newbie to ruby on rails. I am getting this error. I have followed this tutorial http://www.codelearn.org/ruby-on-rails-tutorial/forms-form_tag-params-attr_accessible-model-validation
for the form posting. But when I click on submit i was getting an error
this is my
controller
class CompanyratingController < ApplicationController
def index
#companies = Companyrating.all
end
def add
#companies.create(:companies => params[:name, :place, :rate, :rank])
#redirect_to :action => 'index'
#companies = Companyrating.new(params[:name])
if #companies.save
flash[:success] = "Welcome to My Space!"
redirect_to root_url
end
end
end
this is modal
class Companyrating < ActiveRecord::Base
attr_accessible :name, :place, :rate, :rank
end
this is my routes file
get "companyrating/index"
match "companyrating/add" => "todos#add", :via => :post
my index file
<title>Shared Todo App </title>
<h1>Shared Todo App</h1>
<p>All your todos here</p>
<ul><li> <% #companies.each do |t| %>
<li> <%= t.companies_name %> </li>
<li> <%= t.companies_place %> </li>
<li> <%= t.companies_rate%> </li>
<li> <%= t.companies_rank %> </li>
<% end %>
</li></ul>
<%= form_for("#companies/add", :method=>"post") do |f| %>
<%= f.label :name %>
<%= f.text_field :name %>
<%= f.label :place %>
<%= f.text_field :place %>
<%= f.label :rate %>
<%= f.text_field :rate %>
<%= f.label :rank %>
<%= f.text_field :rank %>
<%= f.label :user_id%>
<%= f.text_field :user_id %>
<%= f.submit "Save changes", class: "btn btn-large btn-primary" %>
<% end %>
This was my error: No route matches [POST] "/companyrating/index"
can anyone help me in solving this error

Answer 1

in controller:
def new
#companyrating = Companyrating.new
end
def create
#companies = Companyrating.new(params[:companyrating])
if #companies.save
flash[:success] = "Welcome to My Space!"
redirect_to root_url
else
flash[:error] = "Can't create companyrating."
render 'new'
end
end
in routes.rb:
resources :companyrating
in form:
<%= form_for(#companyrating, method: :post) do |f| %>

Answer 2

The problem you're having is two-fold - with your routes and controller actions
I know Monk_Code gave an answer, but since you're new, I'll explain how it all works for you, with the goal of helping you understand the system a bit better:
Routes
Your first issue is to do with your routes
Rails has done an amazing job of creating great routing structures, and the core of this is the idea of resourceful routes
By using the following code, your Rails app creates a series of 7 routes which Rails uses to send "default" traffic to your controller actions:
#config/routes.rb
resources :companyratings
This routing structure creates the following routes in your app:
new [GET]
index [GET]
create [POST]
edit [GET]
update [POST]
destroy [DELETE]
show [GET]
All of these routes take directed traffic, and routes it to the relevant controller action. This means that if you send a user to /companyratings/, it's going to load the index action, likewise /companyratings/15 will show the show action in the controller
On top of this, you also need to know what the HTTP "verb" does. This is a key principle which Rails uses to route your traffic accordingly. The "verb" in your request is the type of request that's sent, and is dependent on the browser
As you can see from the list above, every route has an associated HTTP verb. The reason why this is important is because if you send a [GET] request to a route which only works with the [DELETE] verb, you're going to get a problem, hence why you're seeing errors when you send a [POST] request to your index action
You should read the Rails tutorial on this, as you can either fix the issue by sending the correct HTTP verb (using :method => :get), or specify the [POST] verb in your index action route
Controller Actions
Controller actions are the function defined in your controller, which are loaded when you run a particular request in Rails
The default index actions are listed above, but you can also have any others you like, as long as you provide the correct routes. Your problem is that you've just used the add action, where you should have used the create action:
class CompanyratingController < ApplicationController
def index
#companies = Companyrating.all
end
def new
#companyrating = Companyrating.new
end
def create
#companies = Companyrating.new(new_company_rating)
if #companies.save
flash[:success] = "Welcome to My Space!"
redirect_to root_url
end
end
private
def new_company_rating
params.require(:company_rating).permit(:variables, :listed, :here)
end
end