Question

I am creating an app using Ruby on Rails and in the Admin panel there are blogs and posts controllers. The routes for the admin area looks like this:

constraints :subdomain => "admin" do
  scope :module => "admin" do
    root to: "pages#index"
    resources :blogs do
      resources :posts, :controller => "posts"
    end
  end
end

What I have is http://admin.mydomain.com/blogs showing the blogs with /blogs/2/ showing the posts on that blog.

What I want is for when creating a new post at /blogs/2/posts/new that the blog_id is attached to the post.

In the admin/posts_controller.rb I have this as the create action

def create
  @post = Post.new(params[:post])

  if @post.save
    redirect_to posts_path, notice: 'Post was successfully created.'
  else
    render action: "new"
  end
end

At the moment it just creates a post. I want to link that post to the current blog id which is in the URL – /blog/2.

How would I go about doing this?

Answer 1

There are a number of ways of doing this and does depend on how you’re actually using the controller. If you just edit posts at /blogs/1/xxxx then you can do this:

The blog_id will be available as params[:blog_id]. I’d usually create a before_filter to find the blog and then do the rest in the create action:

before_filter do
  @blog = Blog.find(params[:blog_id])
end

def create
  @post = @blog.posts.build(params[:post])
  if @post.save
    redirect_to [@blog, @post], notice: 'Post created successfully'
  else
    render :action => 'new'
  end
end