Rails ActiveStorage url_for返回无效的URL

fyd*_*lio 3 ruby-on-rails rails-activestorage

我有一个带有头像的Employee模型。我可以将图像附加到头像上,但是每当我尝试显示图像时,

url_for(@employee.avatar)
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产生无效链接。我所看到的只是标签中alt属性的值。我得到的图像标签如下

<img src="/rails/active_storage/blobs/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBDZz09IiwiZXhwIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--4786aa4d9d82d8f8d572b857965088b20fcb2f49/Portrait.jpg" 
alt="Thumbnail">
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而且我知道图像已正确附加。当我打电话给我时,我得到这个结果:

@employee.avatar
=> #<ActiveStorage::Attached::One:0x00007ff7e9ba41c0 @name="avatar",
@record=#<Employee id: 4, first_name: "Meda", last_name: "Burgdorf",  
created_at: "2019-03-03 23:03:00", updated_at: "2019-03-03 23:17:56">, 
@dependent=:purge_later> 
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正如我在存储目录中看到的图像 屏幕截图文件结构

非常感谢您的帮助。谁能帮我显示保存的图像。

这是我的设置。

class Employee < ApplicationRecord
   has_one_attached :avatar
   ...
end
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我的storage.yml文件的内容

local:
   service: Disk
   root: <%= Rails.root.join("storage") %>
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我从Active Storage的迁移已迁移。查看我的schema.rb文件

ActiveRecord::Schema.define(version: 2019_03_03_211537) do

  create_table "active_storage_attachments", force: :cascade do |t|
    t.string "name", null: false
    t.string "record_type", null: false
    t.integer "record_id", null: false
    t.integer "blob_id", null: false
    t.datetime "created_at", null: false
    t.index ["blob_id"], name: "index_active_storage_attachments_on_blob_id"
    t.index ["record_type", "record_id", "name", "blob_id"], name: "index_active_storage_attachments_uniqueness", unique: true
  end

  create_table "active_storage_blobs", force: :cascade do |t|
    t.string "key", null: false
    t.string "filename", null: false
    t.string "content_type"
    t.text "metadata"
    t.bigint "byte_size", null: false
    t.string "checksum", null: false
    t.datetime "created_at", null: false
    t.index ["key"], name: "index_active_storage_blobs_on_key", unique: true
  end
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V K*_*ngh 6

由于Active Storage将路由附加到主路由文件中,因此它们是在捕获所有路由之后才出现的。更好地,您可以逃脱活动的存储路线,例如

get '*path', to: redirect('/'), constraints: lambda { |req|
  req.path.exclude? 'rails/active_storage'
}
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