Ruby / Rails - Paperclip::ModificationsController#create 中的错误

Question

Paperclip::ModificationsController 中的错误#create Modification model missing required attr_accessor for 'image_file_name'

---

错误：

---

型号： modify.rb

class Modification < ActiveRecord::Base

    has_attached_file :image,
        styles: { thumb: ["64x64#", :jpg],
        original: ['500x500>', :jpg] },
        convert_options: { thumb: "-quality 75 -strip",
        original: "-quality 85 -strip" }

    validates_attachment :image,
        content_type: { content_type: ["image/jpeg", "image/gif", "image/png"] }

end

---

控制器： modify_controller.rb

class ModificationsController < ApplicationController

  def index
    @modifications = Modification.order('created_at')
  end

  def new
    @modifications = Modification.new
  end

  def create
    @modifications = Modification.new(modification_params)
    if @modifications.save
      flash[:success] = "Modification contributed!"
      redirect_to collection_path
    else
      render 'new'
    end
  end

  private

  def modification_params
    params.require(:modification).permit(:image, :title)
  end

end

---

迁移： _create_modifications.rb

class CreateModifications < ActiveRecord::Migration
  def change
    create_table :modifications do |t|
      t.string :title
      t.string :image_file_name 
      t.string :image_content_type 
      t.integer :image_file_size 
      t.timestamps null: false
    end
  end
end

---

迁移： _add_attachment_modification_to_profiles.rb

class AddAttachmentModificationToProfiles < ActiveRecord::Migration
  def self.up
    change_table :profiles do |t|
      t.attachment :modification
    end
  end

  def self.down
    remove_attachment :profiles, :modification
  end
end

---

Schema.rb

  create_table "modifications", force: :cascade do |t|
    t.string   "title"
    t.datetime "created_at", null: false
    t.datetime "updated_at", null: false
  end

...

  create_table "profiles", force: :cascade do |t|
    t.integer  "user_id"
    t.string   "first_name"
    t.string   "last_name"
    t.string   "location"
    t.string   "modifications"
    t.string   "website"
    t.text     "bio"
    t.datetime "created_at"
    t.datetime "updated_at"
    t.string   "avatar_file_name"
    t.string   "avatar_content_type"
    t.integer  "avatar_file_size"
    t.datetime "avatar_updated_at"
    t.string   "modification_file_name"
    t.string   "modification_content_type"
    t.integer  "modification_file_size"
    t.datetime "modification_updated_at"
  end

Answer 1

您在模型中声明了两次 has_attached_file :image 方法：modification.rb

尝试删除第一个 has_attached_file :image 并告诉我这是否适合您。