Error during Rails 5 upgrade: Environment data not found in the schema
This error is raised because your old database does not have a configured environment yet, which Rails 5 enforces.
If this error occurs while migrating your parallel test databases, make sure to update the parallel_tests gem first: current versions fix this. If you're still using Cucumber < v3, the latest version of parallel_tests will be 2.18.0.
Related cards:
ActiveRecord::RecordNotFound errors allow you to query the :name and :id of the model that could not be found
ActiveRecord::RecordNotFound errors provide quite meaningful error messages that can provide some insight on application details. Consider the following:
ActiveRecord::RecordNotFound: Couldn't find Organisation::Membership with 'id'=12 [WHE...
Upgrade Rails: Awareness list
Disclaimer
This card is a collection of guides and things to have in mind when upgrading to a specific version. It is not meant to be complete, so please feel free to contribute!
General workflows
- [The official guide](https://gui...
Ruby and Rails deprecation warnings and how to fix them
Add deprecation warnings and their solution or link to available solutions.
Global access to Rake DSL methods is deprecated. Please include Rake::DSL into classes and modules which use the Rake DSL methods.
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Upgrading Cucumber and Capybara to the latest versions available for Rails 2
Specify these gem versions in your Gemfile:
gem 'cucumber', '~> 1.3.0'
gem 'cucumber-rails', '= 0.3.2' # max version for Rails 2
gem 'capybara', '< 2' # capybara 2+ requires Rails 3
gem 'mime-types', '< 2' # dependeny of capybara
...
Unpoly: Showing the better_errors page when Rails raises an error
When an AJAX request raises an exception on the server, Rails will show a minimal error page with only basic information. Because all Unpoly updates work using AJAX requests, you won't get the more detailled [better_errors](h...
Namespacing: why `uninitialized constant` error may occour in `development` but not in `test` environment
Example:
class Book::Page
end
class MyBook < Book
def new_page
Page.new # has to be `Book::Page` in development to make it work
end
end
Method new_page may throw an error when it was called during browser inte...
Upgrade guide for moving a Rails app from Webpack 3 to Webpack 4
Webpacker is Rails' way of integrating Webpack, and version 4 has been released just a few days ago, allowing us to use Webpack 4.
I successfully upgraded an existing real-world Webpack 3 application. Below are notes on everything that I encounte...
Fix for "Rails assets manifest file not found" in Capistrano deploy
If you use webpacker in your Rails application, and you have completely disabled Sprockets, you might get the following error when trying to deploy: Rails assets manifest file not found. This happens inside the deploy:assets:backup_manifest t...
How to upgrade Rails: Workflow advice
When upgrading Rails versions -- especially major versions -- you will run into a lot of unique issues, depending on the exact version, and depending on your app.
However, it is still possible to give some generic advice on how you want to tackle...
Dealing with Solr's "404 Not Found" response
When your Solr seems to be started properly (a process is running with the correct data directory) but never responds properly and replies (via the API or web interface) with...
404 "Not Found"
... check if Solr's log directory is actually wr...