Question

我需要帮助编码显示用户加载图像的数组。我搜索了论坛和教程，我准备承认我被卡住了！我可以看到文件加载到数据库中但我无法访问它们。

感谢您的帮助。

我正在使用rails 5和ruby 2.3.1p112

gem 'carrierwave', github: 'carrierwaveuploader/carrierwave'
gem 'sqlite3'

我有：

class Micropost < ApplicationRecord
  belongs_to :user
  default_scope -> { order(created_at: :desc) }
  validates :user_id, presence: true
  validates :content, presence: true, length: { maximum: 200 }
  mount_uploaders :pictures, PictureUploader
end

class MicropostController < ApplicationController
.
.
  def create
    @micropost = current_user.microposts.build(micropost_params)
.
.
params.require(:micropost).permit(:content, {pictures: [ ]})

我的表格：

<%= f.file_field :pictures, multiple: true, accept: 'image/jpeg,image/gif,image/png' %>

我的观点：

<%= image_tag micropost.pictures_urls %>

我的终端回复：

Started GET
"/images/[%22/app/assets/images/37/%5B%22Thankyou.jpg%22%5D%22]" for
::1 at 2016-08-03 18:11:08 -0700    Started GET
"/images/[%22/app/assets/images/33/%5B%22Thankyou.jpg%22%5D%22]" for
::1 at 2016-08-03 18:11:08 -0700 Started GET
"/images/[%22/app/assets/images/35/%5B%22detailsaboutus.jpg%22%5D%22]"
for ::1 at 2016-08-03 18:11:08 -0700 ActionController::RoutingError
(No route matches [GET]
"/images/[%22/app/assets/images/37/%5B%22Thankyou.jpg%22%5D%22]"):
Started GET
"/images/[%22/app/assets/images/36/%5B%22GPcolors4.jpg%22%5D%22]" for
::1 at 2016-08-03 18:11:08 -0700 Started GET
"/images/[%22/app/assets/images/34/%5B%22GP-digital-logoclear.gif%22%5D%22]"
for ::1 at 2016-08-03 18:11:08 -0700 . . . .

Answer 1

为了解决这个问题，我更新了模型：

class Micropost < ApplicationRecord
  belongs_to :user
  default_scope -> { order(created_at: :desc) }
  validates :user_id, presence: true
  validates :content, presence: true, length: { maximum: 200 }
  mount_uploaders :pictures, PictureUploader
  serialize :pictures, Array                 #updated code
end

在视图中：

<% @micropost.pictures.each do |picture| %>
  <article> <!--used to stylize view -->
     <%= image_tag(picture.url) %>
  </article>
<% end %>

当我在AWS S3和psql db中创建用于生产的Micropost模型时：图片类型为＆＃39; text＆＃39;：

rails g model Micropost pictures:text...

或 rails g migration add_field_to_microposts pictures:text

打开迁移

add_column :microposts, :pictures, :text

more info here

然后 rails db:migrate

希望这有助于另一位新秀！

Answer 2

这看起来像你上传带有has_many关系的文件，所以你得到多个图像及其图像网址数组

你可以这样做

<% micropost.pictures_urls.each do |url| %>
<%= image_tag url %>
<%end%>

数组不显示图像

2 个答案: