Question

我收到以下错误信息:

NoMethodError in UploadStepsController#update

undefined method `attributes=  for #<ActiveRecord::Relation:0x00000104775c40>


app/controllers/upload_steps_controller.rb:12:in `update

我正在造一个巫师,允许用户上传文件, 使用邪恶巫师宝石。我错过了什么?

< 强上加载_ steps_ controller.rb

class UploadStepsController < ApplicationController
include Wicked::Wizard
steps :audience, :rewards, :review

def show
    @upload = current_user.uploads
    render_wizard
end

def update
    @upload = current_user.uploads
    @upload.attributes = params[:upload]
    render_wizard @upload
end


end

< 强 > 上载.rb

class Upload < ActiveRecord::Base
attr_accessible :title, :tagline, :category, :genre, :length, :description

belongs_to :user

validates :title, presence: true
validates :tagline, presence: true
validates :category, presence: true
validates :genre, presence: true
validates :length, presence: true
validates :description, presence: true
validates :user_id, presence: true

default_scope order:  uploads.created_at DESC 
end

<强 > 新错误

NoMethodError in UploadStepsController#update
undefined method `save  for #<ActiveRecord::Relation:0x0000010159c098>

app/controllers/upload_steps_controller.rb:13:in `update

Answer 1

当前 _user. uploads is AREL 对象。所以, u 必须指定上传要更新的内容。例如, 第一次用户上传。

current_user.uploads.first.update_attributes(params[:upload])

或也许

@upload = current_user.uploads.find(params[:upload].delete(:id))
@upload.update_attributes(params[:upload])

或所有记录

@upload = current_user.uploads
@upload.update_all(params[:upload])

Answer 2

以此代替:

@upload.update_attributes(params[:upload])

Answer 3

@ upload = current_user.uploads, 它给了您上传对象的数组, 但属性方法适用于单个对象。所以, 您必须应用每种方法。

@uploads = current_user.uploads
@uploads.each do | upload|
  upload.update_attributes(params[:upload])
end

友情链接