Rails nomethod error on create action - ruby-on-rails

Question

I have a create product page and an add photo page. Add photo page should add photos to a product that was just created.
I can get to add photo page /products/:product_id/pics(.:format) but I get an error on submit
ActiveRecord::RecordNotFound (Couldn't find Product without an ID):
photo controller
def create
#product = Product.find(params[:product_id]) # <--- error here
#photo = Photo.new
if #photo.valid?
#photo.product_id = #product.id
#photo.save!
respond_to do |format|
format.html { redirect_to product_path(#product) }
format.json { render json: #product }
end
else
redirect_to root_url, :notice => "Somehting went wrong!"
end
end
pics.html.haml
= form_for #photo, :html => { :multipart => true, :id => "fileupload" } do |f|
= f.file_field :upload
products controller
def pics
#product = Product.find(params[:product_id])
#photo = Photo.new
# #product.photos.build
end
full console error
Started POST "/photos" for 127.0.0.1 at 2013-07-09 02:11:11 -0400
Processing by PhotosController#create as JSON
Parameters: {"utf8"=>"✓", "authenticity_token"=>"K9jWB2D0bFUB5+KOCRKLUsuDGNLchjzCBCL1h1znOiQ=", "photo"=>{"upload"=>#>}}
Completed 404 Not Found in 1ms
ActiveRecord::RecordNotFound (Couldn't find Product without an ID):
app/controllers/photos_controller.rb:15:in `create'
console with sachins solution
Started POST "/photos" for 127.0.0.1 at 2013-07-09 02:55:25 -0400
Processing by PhotosController#create as JSON
Parameters: {"utf8"=>"✓", "authenticity_token"=>"5RV+GUCvNEFrw7l3/ApqAlbK/XJP78LmDR2Hc+O0rQ0=", "product_id"=>"125", "photo"=>{"upload"=>#>}}
Product Load (0.1ms) SELECT "products".* FROM "products" WHERE "products"."id" = ? LIMIT 1 [["id", "125"]]
Redirected to http://google.com/
Completed 302 Found in 4ms (ActiveRecord: 0.1ms)
Started GET "/" for 127.0.0.1 at 2013-07-09 02:55:25 -0400
Processing by StaticPagesController#home as JSON
Rendered static_pages/home.html.haml within layouts/application (0.1ms)
User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."auth_token" IS NULL LIMIT 1
Completed 200 OK in 93ms (Views: 91.8ms | ActiveRecord: 0.3ms)

Answer 1

try this out: ---
photos controller
def new
#product = Product.find(params[:product_id])
#photo = Photo.new
#photo.product_id = #product.id
end
pics.html.haml
= form_for #photo, :html => { :multipart => true, :id => "fileupload" } do |f|
= f.file_field :upload
= hidden_field_tag 'product_id', #photo.product_id

Answer 2

Use form_for [#product, #photo] instead of just #photo in your form. Be sure to, of course, find the product using params[:product_id].
You need to nest your routes like this:
resources :products do
resources :photos
end
Otherwise you won't have a params[:product_id] on your request.

Answer 3

try in your form
form_for [#product, #photo]

Answer 4

error is there in accessing the product_id from params
use params[:product_id] instead params[:product][:product_id]

Answer 5

Just set the hidden_field_tag in form_for
eg:-
= hidden_field_tag 'product_id', #product.id