Cloud9 Rails エラー

Question

エラー内容

NoMethodError in Books#index
Showing /home/ec2-user/environment/Bookers/app/views/books/index.html.erb where line #14 raised:

undefined method `each' for nil:NilClass
Extracted source (around line #14):
12
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14
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16
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</thead> <tbody> <% @list.each do |list| %> <div class="book-item"> <div class="book-image"><%= image_tag('img/forest.jpg', class: 'book-image') %></div> <section class="book-text">

### views

<tbody> <% @list.each do |list| %> <div class="book-item"> <div class="book-image"><%= image_tag('img/forest.jpg', class: 'book-image') %></div> <section class="book-text"> <h3 class="book-text-heading"><%= link_to book.title, book_path(book) %></h3> <p class="book-date"><%= book.created_at %></p> <span class="category"><%= book.category %></span> </section> </div> <% end %> </tbody>

コントローラー

class BooksController < ApplicationController

def top
end

def edit
end

def new
@list = List.new
end

def create
list = List.new(list_params)
list.save
redirect_to books_path(list.id)
end

def index
@lists = List.all
end

def show
@list = List.find(params[:id])
end

private
def list_params
params.require(:list).permit(:title, :body)
end
end

ルート

Rails.application.routes.draw do
get 'todolists/new'
get 'top' => 'homes#top'
post 'todolists' => 'todolists#create'
get 'todolists' => 'todolists#index'
get 'todolists/:id' => 'todolists#show', as: 'todolist'
get 'books/:id' => 'books#show', as: 'book'
get 'homes/index'
get 'homes/show'
get 'homes/new'
get 'homes/edit'
get 'top' => 'books#top'
get 'books/index'
get 'books/show'
get 'books/new'
get 'books/edit'
get 'books' => 'books#index'
get 'books' => 'homes#top'

For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html

end

エラーの原因また解決方法を教えてください。
よろしくお願いします。

Comments

[m.ts10806]

コードやエラーはマークダウンのcode機能を利用してご提示ください。
https://teratail.com/questions/238564

あと、エラーの原因はエラーに書いてありますよ。
https://qiita.com/cannorin/items/eb062aae88bfe2ad6fe5

Answer 1

def index では @lists = List.all です
viewでは <% @list.each do |list| %> です。