Spring in Rails 6 tries to load ActiveRecord even when AR is not part of the application #601
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Something in your app is defining |
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The AR require is triggered from that line, leading me to believe that something configures AR to be autoloaded, but I don't know how to determine what that would be. In any event "my app" has no code, as stated in the above description. I generated it using the standard Rails generator and removed AR railtie. |
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oh. Yeah, that is true. |
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Try this "--skip-active-record" with "rails new" |
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I thought simply adding sqlite to the bundle was a sufficient workaround, but per https://stackoverflow.com/questions/58352612/rails-tasks-and-generators-are-failing/58383659#58383659 the application must define a full AR configuration. If this configuration is loaded, i.e. connection(s) to the database are established, this is a rather heavy workaround considering the AR database won't ever be used by any application code. |
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I tripped over this as well deploying an application to Heroku. I did not need ActiveRecord, and simply leaving sqlite installed is not compatible with Heroku. It looks like a few indirect dependencies on ActiveRecord precipitated the autoloading. Anyways, the resolution turns out to be relatively straightfoward.
--- a/config/application.rb
+++ b/config/application.rb
@@ -1,6 +1,29 @@
require_relative 'boot'
-require 'rails/all'
+# require 'rails/all'
+
+ # Removed because ActiveRecord:
+ # active_record/railtie
+ #
+ # Removed because precipitates AR load:
+ # action_mailbox/engine
+ # active_storage/engine
+ # action_text/engine
+
+%w(
+ action_cable/engine
+ active_job/railtie
+ action_mailer/railtie
+ action_controller/railtie
+ action_view/railtie
+ rails/test_unit/railtie
+ sprockets/railtie
+).each do |railtie|
+ begin
+ require railtie
+ rescue LoadError
+ end
+end
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -29,7 +29,7 @@ Rails.application.configure do
end
# Store uploaded files on the local file system (see config/storage.yml for options).
- config.active_storage.service = :local
+ # config.active_storage.service = :local
# Don't care if the mailer can't send.
config.action_mailer.raise_delivery_errors = false
@@ -40,10 +40,10 @@ Rails.application.configure do
config.active_support.deprecation = :log
# Raise an error on page load if there are pending migrations.
- config.active_record.migration_error = :page_load
+ # config.active_record.migration_error = :page_load
# Highlight code that triggered database queries in logs.
- config.active_record.verbose_query_logs = true
+ # config.active_record.verbose_query_logs = trueHopefully this helps! |
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Thanks so much @coderifous ! You really helped me out today |
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@coderifous active storage is the point in my case. Thank you |
If I create a skeleton Rails API application, and then remove ActiveRecord from the application, spring still tries to load AR which ultimately fails and prevents generators etc. from working.
This is a regression in Rails 6 - in Rails 5.2 everything works as expected.
I created two applications, which are identical except for version of Rails used.
https://github.com/p-mongo/tests/tree/master/spring-ar-sqlite-5
https://github.com/p-mongo/tests/tree/master/spring-ar-sqlite-6
Generate the app:
Edit
Gemfile, removing reference tosqlite.Edit
config/application.rb, commenting out ActiveRecord and ActiveStorage:Run:
Result:
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