背景：
我正在尝试使用带有Paperclip gem的Strong Params将照片上传添加到广告模型,其中Photo是一个单独的模型“has_attached_file”：upload,我在调用forms_for(实际上是semantic_forms_for,因为我正在使用Formtastic)广告#new视图将图像上传到Photo实例. Params看起来不错,但我想我在控制器中遗漏了一些东西.尽管多次迭代控制器代码,但仍无法使其工作.我需要做些什么才能让它发挥作用？
非常感谢任何提示或指示！谢谢
–
广告模型：
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
–
照片型号：
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 were missing some super-important details. Try again"
redirect_to new_ad_path
end
end
private
def ad_params ##excluded all attributes except nested upload attrib. for gist
params.require(:ad).permit(photos_attributes: [upload: [:upload_file_name,:upload_content_type]])
end
end
广告#新
<%= semantic_form_for @ad do |form| %>
<!-- left out all other form fields -->
<%= form.semantic_fields_for :photo do |photo| %>
<%= photo.file_field :upload %>
<% end %>
<% end %>
提交操作后广告参数哈希(广告#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":[]}}}
路线
resources :ads,only: [:new,:create,:show,:index,:edit,:destroy] do
resources :comments,only: [:create,:destroy]
resources :photos,:destroy]
resources :favorite_ads,:destroy]
resource :emails,only: :create
end