'Unable to autoload constant ActiveStorage::Blob::Analyzable Error with Rails 5.2, AWS S3, and ActiveStorage

I've been battling this guy for a while and have done all the Googlies on it (here, here, and many equally-unhelpful others) but to no avail.

The official error is this, called on the first line of my create method:

Unable to autoload constant ActiveStorage::Blob::Analyzable, expected /Users/lizbayardelle/.rvm/gems/ruby-2.5.0/gems/activestorage-5.2.1/app/models/active_storage/blob/analyzable.rb to define it

I'm creating a blog model, which has_one_attached :pdf and one :image, both through ActiveStorage. These relationships are all in the blog model:

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

My controller blogs#create model is here:

  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

With this as my params:

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

I followed this tutorial to set up ActiveStorage with S3 and this one to set up ActiveStorage in general.

My storage.yml looks like this:

    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"] %>

My new blog form looks like this:

<%= 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 %>

I did input the config keys to Heroku, but since this error is on localhost I can't see that making a difference. I also made sure minimagick is installed.

Can anyone see what's going wrong here? I'm really growing to hate ActiveStorage after all the issues it's giving me...

ADDITIONAL INFORMATION

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

ruby-on-rails rails-activerecord

Solution 1:^[1]

Fix for this is to run the following in the order.

rails active_storage:install
rake db:migrate

And if you get the error, Failed to save the new associated image_attachment, it's mostly because of has_one association. To fix it, you should do the following

@blog.image.purge
@blog.image.attach(params[:image])

Solution 2:^[2]

In my case the problem was with Autoloading and Reloading Constants (Zeitwerk Mode) (Rails 6.1)

I solved changing the file: /config/environments/development.rb

config.autoloader = :classic

(source: https://github.com/rails/rails/issues/38681)

Solution 3:^[3]

I know that this already has an answer, but I stumbled across this same situation where re-installing active_storage and migrating my database didn't work.

I stumbled across this forum: https://groups.google.com/forum/#!topic/rubyonrails-talk/RaFBG6wi2K0 and found an answer that pushed me in the right direction.

My problem was that my storage.yml file was incorrect, and wasn't even valid yml. Try running your storage.yml file through an online yml validator: http://www.yamllint.com/

It failed to validate, and I was able to figure out my problem from there.

Solution 4:^[4]

I ran into this after having done:

rails active_storage:install
rake db:migrate

the issue was that I didn't have the correct "config/master.key" file for the current "config/credentials.yml.enc" file.

Solution 5:^[5]

Thanks to nudges from Thomas and user6374022, I found that my YAML was not parsing correctly in development.

storage.yml:

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

google:
  service: GCS
  project: app
  bucket: <%= Rails.application.credentials.dig(Rails.env.to_sym, :google, :bucket) %>
  credentials:
    type: <%= Rails.application.credentials.dig(Rails.env.to_sym, :google, :type) %>
    project_id: <%= Rails.application.credentials.dig(Rails.env.to_sym, :google, :project_id) %>
    private_key_id: <%= Rails.application.credentials.dig(Rails.env.to_sym, :google, :private_key_id) %>
    private_key: <%= Rails.application.credentials.dig(Rails.env.to_sym, :google, :private_key).dump %>
    client_email: <%= Rails.application.credentials.dig(Rails.env.to_sym, :google, :client_email) %>
    client_id: <%= Rails.application.credentials.dig(Rails.env.to_sym, :google, :client_id) %>
    auth_uri: <%= Rails.application.credentials.dig(Rails.env.to_sym, :google, :auth_uri) %>
    token_uri: <%= Rails.application.credentials.dig(Rails.env.to_sym, :google, :token_uri) %>
    auth_provider_x509_cert_url: <%= Rails.application.credentials.dig(Rails.env.to_sym, :google, :auth_provider_x509_cert_url) %>
    client_x509_cert_url: <%= Rails.application.credentials.dig(Rails.env.to_sym, :google, :client_x509_cert_url) %>

In my case the private_key line wasn't parsing correctly in development because that dig function returns null, and the dump function doesn't exist for nil.

I corrected it with the following:

private_key: <%= (Rails.application.credentials.dig(Rails.env.to_sym, :google, :private_key) || '').dump %>

Solution 6:^[6]

For some reason the config.autoloader = :classic option broke loading for some other classes in my app; however, adding an initializer with the following worked (Rails 6.0.4.7):

Rails.application.reloader.to_prepare do
  ActiveStorage::Blob
end

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	Kedarnag Mukanahallipatna
Solution 2	eveevans
Solution 3	Kody_06
Solution 4	Thomas M.
Solution 5	Emeka
Solution 6	Ben Yee

'Unable to autoload constant ActiveStorage::Blob::Analyzable Error with Rails 5.2, AWS S3, and ActiveStorage

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Solution 5:[5]

Solution 6:[6]