About midway through the Getting Started with Rails guide
(http://guides.rubyonrails.org/getting_started.html) I ran into a problem.
The problem is in section: "5.7 Showing Posts".
The document describes how to setup the "show.html.erb" file as follows:
<p>
<strong>Title:</strong>
<%= @post.title %>
</p>
<p>
<strong>Text:</strong>
<%= @post.text %>
</p>
and the associated controller looks like:
class PostsController < ApplicationController
def new
end
def create
@post = Post.new(post_params)
@post.save
redirect_to @post
#redirect_to action: :show, id: @post.id
#render text: params[:post].inspect
end
private
def post_params
params.require(:post).permit(:title, :text)
end
def show
@post = Post.find(params[:id])
end
end
... show the "show" action is supposed to return the "post" information
(i.e. the blog post into the posts table) and I know that it exists in the
table but I get an error indicating that:
NoMethodError in Posts#show
Showing *
/Users/dnassler/dev/rails/workspace/blog/app/views/posts/show.html.erb* where
line *#3* raised:
undefined method `title' for nil:NilClass
Extracted source (around line *#3*):
1
2
3
4
5
6
<p>
<strong>Title:</strong>
<%= @post.title %>
</p>
<p>
Rails.root: /Users/dnassler/dev/rails/workspace/blog
Application Trace <http://localhost:3000/posts/8#> | Framework
Trace<http://localhost:3000/posts/8#>
| Full Trace <http://localhost:3000/posts/8#>
app/views/posts/show.html.erb:3:in
`_app_views_posts_show_html_erb___2211649412857058384_70196496456240'
Request
*Parameters*:
{"id"=>"8"}
So it is as if the Post.find(params[:id]) call within the "show" method
failed to find the post with id=8? Or maybe there is something wrong with
the way that the show.html.erb file is defined?
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