how to link to a nested route path inside a loop? - ruby-on-rails

Question

In my application I have stories and substories. Substories are nested inside stories and on the storiesindex.html.erb. I'm looping trough all the stories, and inside I'm looping through all the substories.
here is the code:
<% #stories.each do |story| %>
<%= story.title %>
<%= story.plot %>
<%= link_to 'Show', story_path(story) %>
<%= link_to 'Edit', edit_story_path(story) %>
<%= link_to "Delete", story_path(story), method: :delete, data: { confirm: "Are you sure?" } %>
<% story.substories.each do |substories| %>
<%= substories.title %>
<%= substories.subplot %>
<% end %>
<% end %>
<%= link_to 'New Story', new_story_path %>
This works fine, but I want to link to the edit page of each substory by passing the following argument inside the second loop:
<%= link_to 'Edit', edit_story_substory_path(substory.story, substory) %>
I get a NameError in Stories#index undefined local variable or method 'substory', however this work fine in the substories index.html.erb file.
I've also tried the following:
<%= link_to 'Edit', edit_story_substory_path(#substory.story, #substory) %>
for which I get a NoMethodError in Stories#index undefined method 'story' for nil:NilClass
Here are my routes models and controllers:
#routes.rb
resources :stories do
resources :substories
end
#story.rb
has_many :substories
#substory.rb
belongs_to :story
stories_controller.erb
before_action :set_story, only: [:show, :edit, :update, :destroy]
def index
#stories = Story.all
end
def show
#substories = Substory.where(story_id: #story.id).order("created_at DESC")
end
def new
#story = Story.new
end
def edit
end
def create
#story = Story.new(story_params)
respond_to do |format|
if #story.save
format.html { redirect_to root_path, notice: 'Story was successfully created.' }
format.json { render :show, status: :created, location: root_path }
else
format.html { render :new }
format.json { render json: root_path.errors, status: :unprocessable_entity }
end
end
end
def update
respond_to do |format|
if #story.update(story_params)
format.html { redirect_to root_path, notice: 'Story was successfully updated.' }
format.json { render :show, status: :ok, location: root_path }
else
format.html { render :edit }
format.json { render json: #story.errors, status: :unprocessable_entity }
end
end
end
def destroy
#story.destroy
respond_to do |format|
format.html { redirect_to stories_url, notice: 'Story was successfully destroyed.' }
format.json { head :no_content }
end
end
private
def set_story
#story = Story.find(params[:id])
end
def story_params
params.require(:story).permit(:title, :plot)
end
substories_controller.erb
before_action :set_substory, only: [:show, :edit, :update, :destroy]
before_action :set_story
def index
#substories = Substory.all
end
def show
end
def new
#substory = Substory.new
end
def edit
end
def create
#substory = Substory.new(substory_params)
#substory.user_id = current_user.id
#substory.story_id = #story.id
if
#substory.save
redirect_to #story
else
render 'new'
end
end
def update
respond_to do |format|
if #substory.update(substory_params)
format.html { redirect_to root_path, notice: 'Story was successfully updated.' }
format.json { render :show, status: :ok, location: root_path }
else
format.html { render :edit }
format.json { render json: #story.errors, status: :unprocessable_entity }
end
end
end
def destroy
#substory.destroy
redirect_to root_path
end
private
def set_story
#story = Story.find(params[:story_id])
end
def set_substory
#substory = Substory.find(params[:id])
end
def substory_params
params.require(:substory).permit(:title, :subplot)
end
What am I missing?

Answer 1

<% story.substories.each do |substory| %>
<%= substory.title %>
<%= substory.subplot %>
<% if substory %>
<%= link_to 'Edit', edit_story_substory_path(substory.story, substory) %>
<% end %>
<% end %>
You just made a typo. #substory would work too if you declare it on your Stories#index