質問編集履歴
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書式の改善
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File without changes
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@@ -6,28 +6,25 @@
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6
6
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投稿一覧(index.html.erb)にユーザーの画像を表示しようとしたらエラー発生。
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7
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8
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### 発生している問題・エラーメッセージ
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9
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```
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9
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-
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10
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NoMethodError in Posts#index
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Showing /vagrant/new_app/app/views/posts/index.html.erb where line #6 raised:
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undefined
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undefined method `image_name' for nil:NilClass
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Extracted source (around line #6):
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15
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14
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4
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16
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4 <div class="posts-index-item">
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15
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5
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17
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5 <div class="post-left">
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16
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6
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18
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6 <img src="<%= "/post.user_images/#{post.user.image_name}" %>">
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7
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7 </div>
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8
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8 <div class="post-right">
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9
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9 <div class="post-user-name">
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-
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Rails.root: /vagrant/new_app
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Application Trace | Framework Trace | Full Trace
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29
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app/views/posts/index.html.erb:6:in `block in
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26
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app/views/posts/index.html.erb:6:in `block in _app_views_posts_index_html_erb___226630752__647422898'
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30
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app/views/posts/index.html.erb:3:in `
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app/views/posts/index.html.erb:3:in `_app_views_posts_index_html_erb___226630752__647422898'
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28
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Request
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Parameters:
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@@ -40,10 +37,10 @@
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Headers:
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None
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40
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```
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### 該当のソースコード(routes.rb)
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### 該当のソースコード
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-
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```Ruby
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Rails.application.routes.draw do
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get "login" => "users#login_form"
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@@ -69,21 +66,9 @@
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69
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get "about" => "home#about"
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end
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```
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### 該当のソースコード
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69
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-
```Ruby
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-
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70
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### 該当のソースコード(posts_controller.rb)
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validates :content, {presence: true, length: {maximum: 140}}
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validates :user_id, {presence: true}
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71
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def user
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return User.find_by(id: self.user_id)
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end
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-
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end
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```
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### 該当のソースコード
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-
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87
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```Ruby
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class PostsController < ApplicationController
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@@ -140,7 +125,7 @@
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140
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end
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```
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### 該当のソースコード
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128
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### 該当のソースコード(index.html.erb)
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145
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```HTML
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<div class="main posts-index">
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@@ -148,7 +133,7 @@
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148
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<% @posts.each do |post| %>
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149
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<div class="posts-index-item">
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150
135
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<div class="post-left">
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151
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<img src="<%= "/post.user_images/#{user.image_name}" %>">
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136
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<img src="<%= "/post.user_images/#{post.user.image_name}" %>">
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152
137
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</div>
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153
138
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<div class="post-right">
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139
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<div class="post-user-name">
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@@ -162,6 +147,52 @@
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162
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</div>
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```
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164
149
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150
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### 該当のソースコード(show.html.erb)
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151
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```HTML
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152
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<div class="main posts-show">
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153
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<div class="container">
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154
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<div class="posts-show-item">
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<div class="post-user-name">
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156
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<img src="<%= "/user_images/#{@user.image_name}" %>">
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157
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<%= link_to(@user.name, "/users/#{@user.id}") %>
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158
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</div>
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159
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<p>
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160
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<%= @post.content %>
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161
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</p>
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162
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<div class="post-time">
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<%= @post.created_at %>
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164
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</div>
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<div class="post-menus">
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166
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<%= link_to("編集", "/posts/#{@post.id}/edit") %>
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167
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<%= link_to("削除", "/posts/#{@post.id}/destroy",{method: "post"}) %>
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168
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</div>
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169
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</div>
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170
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</div>
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</div>
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```
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174
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### 該当のソースコード(user.rb)
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175
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```Ruby
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176
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class User < ApplicationRecord
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177
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validates :name,{presence: true}
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178
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validates :email, {presence: true, uniqueness: true}
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179
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validates :password, {presence: true}
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180
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end
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181
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```
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182
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183
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184
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### 該当のソースコード(post.rb)
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185
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```Ruby
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186
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class Post < ApplicationRecord
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187
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validates :content, {presence: true, length: {maximum: 140}}
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188
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validates :user_id, {presence: true}
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189
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190
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def user
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return User.find_by(id: self.user_id)
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192
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end
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193
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end
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195
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```
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165
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### 試したこと
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166
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-
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197
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投稿の詳細画面を表示しようとしたところそれでもメソッドエラーが出たので
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167
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-
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198
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ビュー以外にミスがあるのかと思いました。
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