我一直在与这个家伙斗争了一段时间，并做了所有的谷歌在它（here，here，和许多同样无用的其他人），但无济于事。
官方的错误是这样的，在我的create方法的第一行调用：
无法自动加载常量ActiveStorage：：Blob：：Analyzable，需要/Users/lizbayardelle/.rvm/gems/ruby-2.5.0/gems/activestorage-5.2.1/app/models/active_storage/blob/analyzable.rb来定义它
我正在创建一个blog模型，其中has_one_attached:pdf和一个:image，都是通过ActiveStorage创建的。这些关系都在blog模型中：

class Blog < ApplicationRecord
  belongs_to :user
  has_one_attached :image
  has_one_attached :pdf
end

我的控制器blogs#create型号在这里：

def create
    @blog = Blog.new(blog_params)
    @blog.user_id = current_user.id
    if @blog.published
      @blog.published_on = DateTime.current
    end

    respond_to do |format|
      if @blog.save
        @blog.image.attach(params[:image])
        @blog.pdf.attach(params[:pdf])
        format.html { redirect_to @blog, notice: 'Blog was successfully created.' }
        format.json { render :show, status: :created, location: @blog }
      else
        format.html { render :new }
        format.json { render json: @blog.errors, status: :unprocessable_entity }
      end
    end
  end

以这个作为我的参数：

def blog_params
  params.require(:blog).permit(:title, :teaser, :body, :cta, :category, :linked_module, :published, :published_on, :user_id, :image, :pdf)
end

我按照this教程使用S3设置ActiveStorage，并按照this one设置ActiveStorage。
我的storage.yml看起来像这样：

test:   service: Disk   root: <%= Rails.root.join("tmp/storage") %>

    local:   service: Disk   root: <%= Rails.root.join("storage") %>

    # Use rails credentials:edit to set the AWS secrets (as aws:access_key_id|secret_access_key) amazon:   service: S3   access_key_id: <%= ENV["AWS_ACCESS_KEY_ID"] %>   secret_access_key: <%= ENV["AWS_SECRET_ACCESS_KEY"] %>   region: us-west-1   bucket: *bucket name*

With this in my `secrets.yml` (which is GitIgnored, if it makes a difference):
development:
  secret_key_base: actual key here
  AWS_ACCESS_KEY_ID: actual key here
  AWS_SECRET_ACCESS_KEY: actual key here
test:
  secret_key_base: actual key here

# Do not keep production secrets in the repository,
# instead read values from the environment.
production:
  AWS_ACCESS_KEY_ID: <%= ENV["AWS_ACCESS_KEY_ID"] %>
  AWS_SECRET_ACCESS_KEY: <%= ENV["AWS_SECRET_ACCESS_KEY"] %>
  secret_key_base: <%= ENV["SECRET_KEY_BASE"] %>
  recaptcha_site_key: <%= ENV["RECAPTCHA_SITE_KEY"] %>
  recaptcha_secret_key: <%= ENV["RECAPTCHA_SECRET_KEY"] %>

我的新博客看起来像这样：

<%= simple_form_for(@blog) do |f| %>
  <%= f.error_notification %>
  <%= f.error_notification message: f.object.errors[:base].to_sentence if f.object.errors[:base].present? %>

  <div class="form-inputs">
    <div class="form-group">
      <%= f.label :category %>
      <%= f.select :category, options_for_select(['General', 'House', 'Spouse', 'Kids', 'Other'], { class: "form-control" }) %>
    </div>
    <div class="form-group">
      <%= f.label :title %>
      <%= f.text_field :title, class: "form-control" %>
    </div>
    <div class="form-group">
      <%= f.label :teaser %>
      <%= f.text_area :teaser, class: "form-control" %>
    </div>
    <div class="form-group">
      <%= f.label :body %>
      <%= f.trix_editor :body %>
    </div>
      <div class="form-group">
      <%= f.label :cta %>
      <%= f.text_field :cta, class: "form-control" %>
    </div>
    <div class="form-group">
      <%= f.label :linked_module %>
      <%= f.text_field :linked_module, class: "form-control" %>
    </div>
    <div class="form-group">
      <%= f.label "Blog Image" %><br />
      <%= f.file_field :image %>
    </div>
    <div class="form-group">
      <%= f.label "Linked PDF" %><br />
      <%= f.file_field :pdf %>
    </div>
    <div class="form-group text-center">
      <%= f.input :published %>
    </div>
  </div>

  <div class="form-actions text-center">
    <%= f.button :submit %>
  </div>
<% end %>

我确实输入了配置键到Heroku，但由于这个错误是在本地主机上，我看不出有什么不同。我还确保安装了minimagick。
有人能看出哪里出问题了吗？我真的越来越讨厌ActiveStorage，因为它给了我这么多问题……

其他信息

Here's my Gemfile:

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.5.0'

gem 'rails', '~> 5.2.0'
gem 'puma', '~> 3.11'
gem 'sass-rails', '~> 5.0'
gem 'uglifier', '>= 1.3.0'
gem 'coffee-rails', '~> 4.2'
gem 'jbuilder', '~> 2.5'
gem 'mini_magick'
gem 'jquery-rails'
gem 'devise'
gem 'bootsnap'
gem 'bootstrap', '~> 4.1.3'
gem 'sprockets-rails'
gem 'bootstrap-sass'
gem 'bcrypt', '~> 3.1.7'
gem 'friendly_id', '~> 5.1.0'
gem 'stripe'
gem 'figaro'
gem 'magnific-popup-rails', '~> 1.1.0'
gem 'simple_form'
gem 'acts-as-taggable-on'
gem 'aws-sdk' , '~> 3'
gem 'aws-sdk-s3', require: false
gem 'simple_form_extension'
gem 'recaptcha', require: "recaptcha/rails"
gem 'font-awesome-rails'
gem 'trix', git: 'https://github.com/bcoia/trix.git'

group :production do
  gem 'pg', '~> 0.20.0'
  gem 'rails_12factor'
end

group :development, :test do
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
  gem 'sqlite3'
end

group :development do
  gem 'sqlite3'
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '>= 3.0.5', '< 3.2'
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

group :test do
  gem 'sqlite3'
  gem 'capybara', '>= 2.15', '< 4.0'
  gem 'selenium-webdriver'
  gem 'chromedriver-helper'
end

gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

  [1]: https://medium.com/alturasoluciones/setting-up-rails-5-active-storage-with-amazon-s3-3d158cf021ff
  [2]: https://edgeguides.rubyonrails.org/active_storage_overview.html