Rails - activeadmin,在更新"父"记录时复制has_many记录

Question

我的模型如下:

class Project < ActiveRecord::Base
  has_many :project_images
  accepts_nested_attributes_for :project_images
end

class ProjectImage < ActiveRecord::Base
  belongs_to :project
  mount_uploader :image, ImageUploader
end

这是activeadmin文件:

ActiveAdmin.register Project do
  remove_filter :projects_sectors
  permit_params :title, :info, :case_study, project_images_attributes: [:image, :cover]

  index do
    column :title
    actions
  end

  form :html => { :enctype => "multipart/form-data" } do |f|
    f.inputs "Project" do
    f.input :title
    f.input :info
    f.input :case_study, :as => :file
  end

  f.inputs "Images" do
    f.has_many :project_images, :allow_destroy => true, :heading => false, :new_record => true do |img_f|
      img_f.input :image, :as => :file , :hint => f.template.image_tag(img_f.object.image)
      img_f.input :cover
    end
  end
  f.actions
end


end

问题在于,当我只是编辑项目并单击更新项目时,它只是复制了该点上存在的关系的所有记录.例如.如果我在1个项目下有2个图像,在更改说,项目标题后,我将最终得到4个图像.

希望很清楚问题是什么.如果有人能给我一个小小的帮助,我将非常感激.

非常感谢提前.

Answer 1

你必须允许图像的id: project_images_attributes: [:id, :image, :cover]

如果你不允许id,它在动作中将为null,并且rails认为它是一个新记录并保存它.