質問編集履歴
1
内容修正
test
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File without changes
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test
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@@ -1,41 +1,172 @@
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1
1
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新規投稿画面でpost_pathの未定義エラーが発生します。
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2
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新規投稿の空投稿に対するエラーメッセージを表
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2
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+
新規投稿の空投稿に対するエラーメッセージを表示するために実装しているときに起きている事象です。
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3
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```
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undefined method `posts_path' for #<#<Class:0x00007f880a71ddd0>:0x00007f880a727e70>
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5
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```
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```new.html.erb
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<div class="main posts-new">
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<div class="container">
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<h1 class="form-heading"style="text-align: center">投稿する</h1>
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<%= form_with(model: @post, local: true) do |form| %>
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<div class="form">
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7
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-
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<div class="form-body">
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ここから
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<% @post.errors.full_messages.each do |message| %>
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<div class="form-error">
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<%= message %>
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</div>
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<% end %>
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ここまで
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<div>
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<%= form.label :comment, "ひとこと" %>
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<%= form.text_field :comment %>
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</div>
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<div>
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<%= form.label :url, "URL" %>
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<%= form.text_field :url %>
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</div>
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<div>
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<%= form.label :content, "概要" %>
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<%= form.text_area :content %>
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</div>
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<div>
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<%= form.submit "投稿する", data: { confirm: '上記の内容で投稿を作成します。よろしいですか？' } %>
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</div>
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</div>
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</div>
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<% end %>
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</div>
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</div>
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```
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```post_controller.rb
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45
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class PostsController < ApplicationController
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before_action :authenticate_user
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before_action :ensure_correct_user, {only: [:destroy]}
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def index
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@posts = Post.all.order(created_at: :desc)
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end
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def show
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@post = Post.find_by(id: params[:id])
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@user = @post.user
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@likes_count = Like.where(post_id: @post.id).count
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end
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-
def new
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def new
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@user = User.new
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-
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ここから
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@post = Post.new
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ここまで
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end
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def create
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@post = Post.new(posts_params)
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if @post.save
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flash[:notice] = "投稿完了"
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redirect_to("/posts/index")
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else
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render("/posts/new")
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end
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end
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def posts_params
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#投稿内容をパラメータで受け取る
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params.permit(:comment, :site, :url, :content, :tag).merge(user_id: @current_user.id)
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end
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def edit
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@post = Post.find_by(id: params[:id])
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end
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def destroy
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@post = Post.find_by(id: params[:id])
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@post.destroy
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flash[:notice] = "投稿を削除しました"
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redirect_to("/posts/index")
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end
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def ensure_correct_user
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@post = Post.find_by(id: params[:id])
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if @post.user_id != @current_user.id
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flash[:notice] = "権限がありません"
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redirect_to("/posts/index")
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end
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end
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end
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```
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104
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20
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-
この２箇所を削除するとエラーなく新規投稿画面に遷移できるのですが
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105
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ここからここまでの２箇所を削除するとエラーなく新規投稿画面に遷移できるのですが
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21
106
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エラーの真因がわかりません。
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22
107
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また今までcontrollerに@postがなかったのに処理が通っていたのもよくわかりません。（create処理の@postを参照していたから？）
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23
108
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109
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この真因と解決策についてご教授宜しくお願い致します。
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25
110
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111
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```user.rb
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112
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class User < ApplicationRecord
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113
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# Include default devise modules. Others available are:
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114
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# :confirmable, :lockable, :timeoutable, :trackable and :omniauthable
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devise :database_authenticatable, :registerable,
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:recoverable, :rememberable, :validatable, :confirmable
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validates :name, {presence: true, uniqueness: true}
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validates :email, {presence: true, uniqueness: true}
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validates :password,{presence: true}
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def posts
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return Post.where(user_id: self.id)
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end
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def update_without_current_password(params, *options)
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params.delete(:current_password)
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if params[:password].blank? && params[:password_confirmation].blank?
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params.delete(:password)
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params.delete(:password_confirmation)
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end
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result = update_attributes(params, *options)
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clean_up_passwords
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result
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end
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end
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```
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-
```
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140
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```routes.rb
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Rails.application.routes.draw do
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devise_for :users, controllers: {
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registrations: "users/registrations"
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}
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post "users/:id/update" => "users#update"
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post "likes/:post_id/create" => "likes#create"
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post "likes/:post_id/destroy" => "likes#destroy"
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get "users/:id/edit" => "users#edit"
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# post "users/create" => "users#create"
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get "users/:id" => "users#show"
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post "login" => "users#login"
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get "login" => "users#login_form"
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post "logout" => "users#logout"
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156
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get "users/:id/likes" => "users#likes"
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# get "signup" => "users#new"
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get "posts/index" => "posts#index"
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-
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get "posts/new" => "posts#new"
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get "posts/:id" => "posts#show"
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post "posts/new" => "posts#create"
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post "posts/create" => "posts#create"
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post "posts/:id/destroy" => "posts#destroy"
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-
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get "/" => "home#top"
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29
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<h1 class="form-heading"style="text-align: center">投稿する</h1>
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30
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<%= form_with(model: @post, local: true) do |form| %>
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31
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get "about" => "home#about"
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32
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<div class="form-body">
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<% @post.errors.full_messages.each do |message| %>
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34
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<div class="form-error">
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35
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<%= message %>
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36
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</div>
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<% end %>
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-
<div>
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-
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169
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end
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```
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