Rails: Photo uploads (Paperclip) with nesting & strong params -


background:

i'm trying add photo uploads advert model using strong params paperclip gem, photo separate model "has_attached_file" :upload, , calling forms_for (actually semantic_forms_for i'm using formtastic) in ads#new view upload image photo instance. params looks ok think i've missed in controller. haven't been able working despite multiple iterations of controller code. need differently working?

would appreciate tips or pointers! thank you

--

ad model:

class ad < activerecord::base   belongs_to :user      ##edited out irrelevant associations    has_many :photos, dependent: :destroy   accepts_nested_attributes_for :photos, :allow_destroy => true   default_scope { order("created_at desc") }   #validates_presence_of :user_id, :make, :model, :km, :year, :location end

--

photo model:

 class photo < activerecord::base       belongs_to :ad       has_attached_file :upload, :styles => { :main => "600x500>",                                                                                      :thumb => "60x45>" },        :default_url => "http://placehold.it/600x500&text=nice+wheels!"     end

adscontroller

class adscontroller < applicationcontroller      def create         @ad = ad.new(ad_params)       @ad.user_id = current_user.id       @photo = @ad.photos.build         if @ad.save             redirect_to @ad         else             flash.alert="you missing super-important details. try again"             redirect_to new_ad_path         end     end      private      def ad_params ##excluded attributes except nested upload attrib. gist         params.require(:ad).permit(photos_attributes: [upload: [:upload_file_name, :upload_content_type]])     end  end

ads#new

 <%= semantic_form_for @ad |form| %>      <!-- left out other form fields -->              <%= form.semantic_fields_for :photo |photo| %>         <%= photo.file_field :upload %>       <% end %>      <% end %>

ad params hash after submit action (ad#create)

{"location":"abha","make":"bentley","model":"","gear":"","km":"50","price_bid":"500","price_ask":"500","ac":"0","cd":"0","radio":"0","powersteering":"0","abs":"0","satnav":"0","cruise":"0","fwd":"0","convertible":"0","problem_1":"","problem_2":"","problem_3":"","description":"","photo":{"upload":{"original_filename":"mustang-290x218.jpg","content_type":"image/jpeg","headers":"content-disposition: form-data; name=\"ad[photo][upload]\"; filename=\"mustang-290x218.jpg\"\r\ncontent-type: image/jpeg\r\n","tempfile":[]}}}

routes

resources :ads, only: [:new, :create, :show, :index, :edit, :destroy]         resources :comments, only: [:create, :destroy]         resources :photos, only: [:create, :destroy]         resources :favorite_ads, only: [:create, :destroy]         resource :emails, only: :create    end

the form needs specified multi-part file uploads work:

<%= semantic_form_for @ad, :html => {:multipart => true} |form| %>

in addition, aren't permitting tempfile passed:

params.require(:ad).        permit(photos_attributes:                 [upload:                   [:upload_file_name, :upload_content_type, :tempfile]                ])

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