我在rails项目上设置了活动存储.我不断得到错误:
未定义的方法’upload’为nil:NilClass.
未定义的方法’upload’为nil:NilClass.
这就是我所做的.
>我已经运行了迁移:rails active_storage:install
>我编辑了我的开发环境文件:config.active_storage.service =:local
>与我的生产文件相同:config.active_storage.service =:amazon
>我确保使用has_one_attached:image正确设置了我的模型
我的控制器:
class EventsController < ApplicationController def create @event = Event.new(event_params) @event.save end private def event_params params.require(:event).permit(:name,:image) end end
这是表格:
<%= simple_form_for(@event,url: events_path,method: :post) do |f| %> <%= f.input :name %> <%= f.input :image %> <%= f.submit %> <% end %>
这是模型:
class Event < ActiveRecord::Base has_one_attached :image acts_as_list end
值得一提的是,我正在将此特定项目升级到rails 5.它还习惯使用回形针.
问题:
当我提交此表单时,会抛出上述错误.相同
尝试更新@event对象时发生错误.
更新
>在查看框架跟踪时,错误将在此行上抛出:blob.upload io.奇怪的是,当我调试这条线时,blob不是零.它拥有一个没有id的ActiveStorage :: Blob.而且io也不是零.
错误日志:
我故意取出真品令牌.
Started POST "/events" for ::1 at 2018-08-23 10:02:25 -0600 Processing by EventsController#create as HTML Parameters: {"utf8"=>"✓","authenticity_token"=>"*****************","event"=>{"name"=>"test event","image"=>#<Actiondispatch::Http::UploadedFile:0x00007fc816e90af8 @tempfile=#<Tempfile:/var/folders/f9/q3x5477d1dxd7fxjbrl2tvch0000gn/T/RackMultipart20180823-61111-14dih2d.jpg>,@original_filename="sample-image.jpg",@content_type="image/jpeg",@headers="Content-disposition: form-data; name=\"event[image]\"; filename=\"sample-image.jpg\"\r\nContent-Type: image/jpeg\r\n">},"commit"=>"Update Event"} Completed 500 Internal Server Error in 61ms (ActiveRecord: 0.0ms) NoMethodError (undefined method `upload' for nil:NilClass): app/controllers/events_controller.rb:4:in `create' ::1 - - [23/Aug/2018:10:02:25 MDT] "POST /events HTTP/1.1" 500 138644 http://localhost:3000/ -> /events