Cannot update paperclip image in active nested admin form

Question

I have product models and product images. Product_images is a paper clip model. The product has many product_images. I am creating an active admin form that uploads multiple images and displays these images on the product view page.

However, when I save the product. The product table is updated, but not the product_image table. The image is fine, but I can’t update the fields of an already loaded image.

class Product < ActiveRecord::Base attr_accessible :name, :product_images_attributes has_many :product_images, :dependent => :destroy accepts_nested_attributes_for :product_images, :reject_if => lambda { |t| t['product_image'].nil? }, :allow_destroy => true end class ProductImage < ActiveRecord::Base attr_accessible :name, :style attr_accessible :image belongs_to :product has_attached_file :image, :styles => { :small => "150x150>", :large => "320x240>" } validates_attachment_presence :image end ActiveAdmin.register Product do form :html => { :multipart => true } do |f| f.inputs "Admin Details" do f.input :name end f.inputs "Product images" do f.has_many :product_images do |p| p.input :style, :as => :select, :collection => Image::STYLES, :include_blank => false p.input :image, :as => :file, :label => "Image",:hint => p.object.image.nil? ? p.template.content_tag(:span, "No Image Yet") : p.template.image_tag(p.object.image.url(:small)) p.input :_destroy, :as=>:boolean, :required => false, :label => 'Remove image' end end f.buttons end 

UPDATE

In the product model, I do:

  after_update :check def check if ProductImage.find_by_product_id(self.id).changed? raise "image" else raise "fail" end end 

and he always raises a "glitch"

Answer 1

You can configure ActiveRecord to cascade changes to the collection items for the model by adding the parameter :autosave => true when declaring an association.

Try:

  has_many :product_images, :dependent => :destroy, :autosave => true 

Alternatively, you can save the table data in the association in the after_save as follows:

 class Product < ActiveRecord::Base attr_accessible :name, :product_images_attributes has_many :product_images, :dependent => :destroy accepts_nested_attributes_for :product_images, :reject_if => lambda { |t| t['product_image'].nil? }, :allow_destroy => true after_save :do_product_image_update private def do_product_image_update self.product_images.save end end 

Answer 2

I got the same error using rails 4.1. Just solved it. I noticed the warnings in my release:

 Unpermitted parameters: _destroy, id Unpermitted parameters: _destroy, id Unpermitted parameters: _destroy, id 

So, I just passed them allow_params:

permit_params assets_attributes: [:image, :image_file_name, :image_content_type, :image_file_size, :image_updated_at, :_destroy, :id]

to the AA resource page. And it worked. Hope this helps. If not, here are my listings.

 ActiveAdmin.register Product do permit_params :name, :description, :price, :brand_id, :category_id, assets_attributes: [:image, :image_file_name, :image_content_type, :image_file_size, :image_updated_at, :_destroy, :id] form multipart: true do |f| f.inputs "" do f.input :category_id, as: :select, collection: Category.all, include_blank: false f.input :brand_id, as: :select, collection: Brand.all, include_blank: false f.input :name f.input :description f.input :price end f.inputs '' do f.has_many :assets, allow_destroy: true, heading: '', new_record: false do |fasset| fasset.input :image, as: :file, hint: fasset.template.image_tag(fasset.object.image.url(:thumb)) end end f.actions end end class Product < ActiveRecord::Base belongs_to :category belongs_to :brand has_many :assets, dependent: :destroy, autosave: true accepts_nested_attributes_for :assets, allow_destroy: true, :reject_if => lambda { |attributes| attributes[:image].blank? } validate :name, presence: true validate :description, presence: true validate :price, presence: true end class Asset < ActiveRecord::Base belongs_to :product has_attached_file :image, :styles => { :medium => "300x300>", :thumb => "100x100>" }, :default_url => "/images/:style/missing.png" validates_attachment_content_type :image, :content_type => /\Aimage\/.*\Z/ validates_with AttachmentPresenceValidator, :attributes => :image end