First of all, I've found some very helpful answers already (see links below), but I'm still struggling to make this work. I haven't been programming for long, and this is definitely stretching what I feel comfortable claiming to understand.
I have three models. For example's sake, I'll call them Tree, Bark, Engraving (the comments). I'm trying to add a simple form partial for users to submit new comments (engravings).
The below setup is producing the error:
NoMethodError at /trees/1 undefined method `tree' for nil:NilClass
Controllers
class TreesController < ApplicationController
def show
@barks = Bark.where(tree_id: @tree.id)
@engraving= Engraving.new( :bark=> @bark)
end
end
class BarksController < ApplicationController
def show
@engravin= Engraving.new( :bark=> @bark)
@engravings = Engraving.where(bark_id: @bark.id)
end
end
class EngravingsController < ApplicationController
def show
@bark= Bark.find(params[:bark_id])
@engraving = Engraving.new(params[:engraving])
end
end
def create
@bark = Bark.find(params[:bark_id])
@engraving = Engraving.new(params[:engraving])
@engraving.user_id = current_user.id
respond_to do |format|
if @engraving.save
format.html { redirect_to tree_bark_path(@tree, @bark), notice: 'Comment was successfully created.' }
format.json { render action: 'show', status: :created, location: @engraving}
else
format.html { render action: 'new' }
format.json { render json: @engraving.errors, status: :unprocessable_entity }
end
end
end
Models
class Tree < ActiveRecord::Base
belongs_to :user
has_many :barks
has_many :engravings, through: :barks
end
class Bark< ActiveRecord::Base
belongs_to :user
belongs_to :tree
has_many :engravings
delegate :title, :link, :to => :tree, :prefix => true
def new_engraving_path
Rails.application.routes.url_helpers.new_tree_bark_engraving_path(book, self)
end
def serializable_hash(*args)
super.merge 'new_engraving_path' => new_engraving_path
end
end
class Engraving< ActiveRecord::Base
belongs_to :user
belongs_to :bark
delegate :tree, :to => :bark, :prefix => true
def to_edit_path
Rails.application.routes.url_helpers.edit_tree_bark_engraving_path bark_tree, bark, self
end
def to_path
Rails.application.routes.url_helpers.tree_bark_engraving_path bark_tree, bark, self
end
def serializable_hash(*args)
super.merge 'path' => to_path, 'edit_path' => to_edit_path
end
end
Calling the Form in a View
On the Tree show page, I have all the Bark populating there. Clicking on an Bark element opens a modal, where the Bark.content and Engravings are shown. Under the last Engraving, I want to have a text_area form to create a new Engraving, and add it to this "piece" of bark.
# trees\show.html.erb
<%= render @barks %>
# barks\_bark.html.erb
<%= render partial: 'barks/modal', locals: { bark: bark} %>
# barks\modal.html.erb
<% render partial: '/engravings/simpleForm', :collection => bark.engravings %>
# Form partial
<%= form_for @engraving, :url => (new_tree_bark_engraving_path(:tree_id => @bark.tree, :bark_id => @bark.id)) do |f| %>
<%= f.hidden_field :bark_id %>
<div class="field">
<%= f.text_area :content %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
Routes
get "pages/home"
resources :trees do
collection do
get 'search'
post 'load_from_api'
end
resources :barks do
resources :engravings
end
end
resources :barks do
resources :engravings
end
root "trees#index"
Other Answer Sources
Rails Routing Error for nested form_for
