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我知道有围绕这一话题几个问题,一个是几乎相同的,因为我们遵循同样的教程,但没有一个答案是为我工作。我跟着艾默生的走狗教程关于使用回形针附加多个图像(http://emersonlackey.com/screencasts/rails-3-with-paperclip.mov)并且出现错误无法批量分配受保护的属性:assets_attributes。当您查看代码时,有一点需要注意,我每次发布的图片都只有图片,因此图片和资产的术语将被删除,但现在需要其余的网站才能使用。回形针错误 - 无法大规模指派保护属性
我已经创建了一个资产ID,并将其添加到资产模型。另请注意,我有Pins而不是Posts。
在pin.rb型号:
class Pin < ActiveRecord::Base
attr_accessible :description, :image, :image_remote_url, :Designer, :price, :retail_value, :condition, :lender_notes, :size, :material, :color, :classification, :item_category, :asset_attributes
validates :user_id, presence: true
validates :description, presence: true
validates :Designer, presence: true
validates :size, presence: true
validates :color, presence: true
validates :material, presence: true
validates :price, presence: true
validates :retail_value, presence: true
validates :condition, presence: true
validates :lender_notes, presence: true
validates :classification, presence: true
validates :item_category, presence: true
validates_attachment :asset, presence: true,
content_type: { content_type: ['image/jpeg', 'image/jpg', 'image/png', 'image/gif'] },
size: { less_than: 5.megabytes }
belongs_to :user
has_many :line_items
has_many :assets
accepts_nested_attributes_for :assets, :allow_destroy => true
before_destroy :ensure_not_referenced_by_any_line_item
has_attached_file :image, styles: { medium: "320x240"}
# ensure that there are no line items referencing this product
def ensure_not_referenced_by_any_line_item
if line_items.empty?
return true
else
errors.add(:base, 'Line Items present')
return false
end
end
def image_remote_url=(url_value)
self.image = URI.parse(url_value) unless url_value.blank?
super
end
end
在asset.rb模式:
class Asset < ActiveRecord::Base
attr_accessible :asset
belongs_to :pin
has_attached_file :asset, :styles => { :large => "640x480", :medium => "320x240", :thumb => "100x100>" }
end
在pins_controller.rb文件
:
class PinsController < ApplicationController
before_filter :authenticate_user!, except: [:index]
def index
@pins = Pin.order("created_at desc").page(params[:page]).per_page(20)
respond_to do |format|
format.html # index.html.erb
format.json { render json: @pins }
format.js
end
end
def show
@pin = Pin.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.json { render json: @pin }
end
end
def new
@pin = current_user.pins.new
5.times { @pin.assets.build }
respond_to do |format|
format.html # new.html.erb
format.json { render json: @pin }
end
end
def edit
@pin = current_user.pins.find(params[:id])
5.times { @pin.assets.build }
end
def create
@pin = current_user.pins.new(params[:pin])
respond_to do |format|
if @pin.save
format.html { redirect_to @pin, notice: 'Pin was successfully created.' }
format.json { render json: @pin, status: :created, location: @pin }
else
format.html { render action: "new" }
format.json { render json: @pin.errors, status: :unprocessable_entity }
end
end
end
def update
@pin = current_user.pins.find(params[:id])
respond_to do |format|
if @pin.update_attributes(params[:pin])
format.html { redirect_to @pin, notice: 'Pin was successfully updated.' }
format.json { head :no_content }
else
format.html { render action: "edit" }
format.json { render json: @pin.errors, status: :unprocessable_entity }
end
end
end
def destroy
@pin = current_user.pins.find(params[:id])
@pin.destroy
respond_to do |format|
format.html { redirect_to pins_url }
format.json { head :no_content }
end
end
end
在_form。 html.erb文件:
<%= simple_form_for(@pin, :html => { :multipart => true}) do |f| %>
<%= f.full_error :asset_file_size, class: "alert alert-error" %>
<%= f.full_error :asset_content_type, class: "alert alert-error" %>
<%= f.fields_for :assets do |asset_fields| %>
<%= asset_fields.file_field :asset %>
<% end %>
<div class="form-actions">
<%= f.button :submit, class: "btn btn-primary" %>
</div>
<% end %>
谢谢!!!!!
曾经尝试都 - 如果我型我assets_attributes收到错误:NoMethodError在PinsController#为#创建 未定义的方法'资产<针:0x00000102bbea10> –
这意味着你还需要定义在一个'asset'方法Pin模型。在你的'attr_accessible' – tyler
尝试包括':assets_attributes'和':asset',不幸的是没有变化 –