No route matches [POST] "/tv_series/new" - ruby-on-rails

Question

When I display the form, I type in some stuff then I want it to take to the index view
_form.html.erb
<%= simple_form_for #series, :url => { :action => :new } do |f| %>
<%= f.input :title, label: "Series Title" %>
<%= f.input :description %>
<%= f.input :actor %>
<%= f.button :submit %>
<% end %>
Can some one please help me indentify the error for me? I don't know why its not creating the tvseries when I try to create, when I check tvseries.connection, it says its nil, there isn't anything in.
tv_series_controller.rb
class TvSeriesController < ApplicationController
def index
end
def new
#series = Series.new
end
def create
#series = Series.new(serie_params)
if #series.save
redirect_to root_path
else
render 'new'
end
end
private
def show
params.require(:series).permit(:title, :description,:actor)
end
end
new.html.erb
<h1>New Serie</h1>
<%= render 'form' %>
routes.rb
Rails.application.routes.draw do
resources :tv_series
root 'tv_series#index'
end
_create_series.rb
class CreateSeries < ActiveRecord::Migration
def change
create_table :series do |t|
t.string :title
t.text :description
t.string :actor
t.timestamps null: false
end
end
end

Answer 1

Remove the , :url => { :action => :new } and you should be good to go.
This is because there is no route that matches POST /tv_series/new. Instead let Rails figure out the route for you by removing the line above and it will use POST /tv_series.
If you run rake routes you should be able to see all of the available routes along w/ their corresponding HTTP verb (GET, POST, PATCH, etc)
On a sidenote I think your private method is named incorrectly. Looks like you have def show when what you meant to have is def serie_params.

Answer 2

Run rake routes to the console you will get different path for HTTP Verb (GET, POST, PUT/PATCH, DELETE)
Accordingly use the path.
In your case for creating tv_series you have to use post HTTP verb.
Replace :url => { :action => :new } with create action path provided for POST HTTP verb. It will work fine.
Refer this link: http://guides.rubyonrails.org/routing.html

Answer 3

For rails 4, as default it has same name of controller, model, and view. In this context, you have different name of model and controller/view. So you have to determine your URL in your form into this:
<%= simple_form_for #series, :url => { :controller => :tv_series, :action => :create }, :method => :post do |f| %>
or
<%= simple_form_for #series, :url => tv_series_path, :method => :post do |f| %>
I hope this help you.