Association Ruby on Rails - ruby-on-rails

Question

I am trying a an simple association which should work. I followed the tutorial at http://ruby.railstutorial.org/chapters/ and at chapter 10
Here what I have wrote down
model/customer
class Customer < ActiveRecord::Base
has_many :posts, dependent: :destroy
attr_accessible :name, :email, :password, :password_confirmation
has_secure_password
model/post
class Post < ActiveRecord::Base
belongs_to :customer
attr_accessible :description, :post_finish_at, :post_how, :post_location
controller/customers
class CustomersController < ApplicationController
before_filter :signed_in_customer, only: [:edit, :update]
before_filter :correct_customer, only: [:edit, :update]
def index
#customers = Customer.all
end
def show
#customer = Customer.find(params[:id])
#posts = #customer.posts
end ...
controller/post -- should be irrelevant since i am doing a partial
class PostsController < ApplicationController
# GET /posts
# GET /posts.json
def index
#posts = Post.all
respond_to do |format|
format.html # index.html.erb
format.json { render json: #posts }
end
end
# GET /posts/1
# GET /posts/1.json
def show
#post = Post.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.json { render json: #post }
end
end
# GET /posts/new
# GET /posts/new.json
def new
#post = Post.new
respond_to do |format|
format.html # new.html.erb
format.json { render json: #post }
end
end
# GET /posts/1/edit
def edit
#post = Post.find(params[:id])
end
# POST /posts
# POST /posts.json
def create
#post = Post.new(params[:post])
respond_to do |format|
if #post.save
format.html { redirect_to #post, notice: 'Post was successfully created.' }
format.json { render json: #post, status: :created, location: #post }
else
format.html { render action: "new" }
format.json { render json: #post.errors, status: :unprocessable_entity }
end
end
end
# PUT /posts/1
# PUT /posts/1.json
def update
#post = Post.find(params[:id])
respond_to do |format|
if #post.update_attributes(params[:post])
format.html { redirect_to #post, notice: 'Post was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: "edit" }
format.json { render json: #post.errors, status: :unprocessable_entity }
end
end
end
# DELETE /posts/1
# DELETE /posts/1.json
def destroy
#post = Post.find(params[:id])
#post.destroy
respond_to do |format|
format.html { redirect_to posts_url }
format.json { head :no_content }
end
end
end
view/customer/show.html.erb
<div class="posts">
<%= render 'posts/post'%>
</div>
view/post/_post.html.erb
<li>
<%= #posts.each do |post| %>
<%= post.title %>
<% end %>
</li>
Here what the output look like
[]
Why?
Thanks

Answer 1

It looks to me like you've got a couple things wrong. First, the partial (view/post/_post.html.erb) should be rendering a single post, not the whole collection of them. Second problem is that you're not passing anything to the partial.
There's a handy shorthand for rendering collections, where if you just render the collection, it will automatically look for a partial with the same name and render it for each model in the collection.
See: http://guides.rubyonrails.org/layouts_and_rendering.html#using-partials
So I think this should do what you want (I added <ul></ul> tags to make it an unordered list):
view/customer/show.html.erb
<div class="posts">
<ul>
<%= render #posts %>
</ul>
</div>
view/post/_post.html.erb
<li>
<%= post.title %>
</li>

Answer 2

It looks like customer doesn't have a posts association, but only an events association. I'd start there