binding_of_caller | Retrieve the binding of a method 's caller in MRI

Ok, found the problem. Turns out that I had copied the setting config.session_store :cache_store in development.rb from a different project I had been working on. However, this setting was added as part of the StimulusReflex setup for that other project.

From the StimulusReflex docs:

Cookie-based session storage is not currently supported by StimulusReflex.

Instead, we enable caching in the development environment so that we can assign our user session data to be managed by the cache store.

The default setting for this option is cookie_store. By changing it to :cache_store without specifying a cache repo, it implements ActionDispatch::Session::CacheStore and defaults to storing it in Rails.cache, which uses the :file_store option, which dumps it in tmp/cache.

However, further down in development.rb, there is some conditional logic that assigns config.cache_store to :null_store if there is no caching-dev.txt file. This implements ActiveSupport::Cache::NullStore, which is "a cache store implementation which doesn't actually store anything."

So because I had not enabled caching with rails dev:cache for this project, the session cache was getting toasted with every request.

LESSON LEARNED: Be very careful when copying config settings from an old project to a new one!

I'm not really sure what happened and why but I tried doing this on my rails container and I was no longer receiving the said error.

1. docker-compose run --rm bash
2. cd to project directory
3. bundle install

I did finally figure out what this was.
The older versions of rails in this case v4.2.1 used the javascript_include_tag for the line that deals with application:

= javascript_include_tag "application"

In the newer versions of rails in my case v6.1.3.1 you have to use javascript_pack_tag

= javascript_pack_tag

This solved the issue and the views all started working. I did mention above I was working on a PC running Rails v6.1.3; however I noticed I didn't make it clear that I was also having to upgrade this program from Ruby v2.2.2 and Rails v4.2.1 to Ruby v 2.7.2 and Rails v6.1.3, that might have helped to have made that more clear. Apologies if that confused anyone. I am still VERY new to Rails and using StackOverflow.com. I am happy to report I have only 1 single issue left on this program and the rest of the program is all working properly. I will be posting another question in fact because the last issue deals with a complicated scope query and it uses different syntax again due to the newer version of rails and I haven't been able to figure it out. In any even if you are running an older version of Rails and you are trying to get the program to work on a newer version (my case as I couldn't get rails v4.2 to run or work on ANYTHING, PC, Linux nothing) then you have to change the include_tag to a pack_tag. I do not pretend to say I fully understand why. I know it has to do with webpacker but beyond that I am still learning Rails. Perhaps someone with more knowledge than myself can shed some insite as to why the syntax changed. Oh and in addition the line ended up needing to read as follows:

= javascript_pack_tag "application", "data-turbolinks-track": "reload"

I didn't have the turbolinks reference either.

I hope this helps someone else in a similar situation that I was in, it was not easy to find. I only discovered it when I went through some tutorials on making other generic apps and saw the difference on that line.

Update:

It looks like it was a problem with my post-Bower configuration (I migrated from Bower --> Yarn) I was able to solve Sprockets errors by adding this line to my assets.rb:

Rails.application.config.assets.paths << Rails.root.join('node_modules')

and by running yarn add for files that Sprockets could not locate.

I also made the following updates to old package names in my `application.rb'

Looks like you're running into compatibility issues trying to use the latest version of the activerecord-import gem at the time of writing (released in October 2020) with activerecord 3.2.22.5 (released in September 2016). You do mention it's a rails 3.2.15 app but you're not using activerecord 3.2.15 which is confusing.

Try using activerecord-import 0.4.1 (released in July 2013) and activerecord 3.2.15 which should be compatible with rails 3.2.15.

You're getting the error because redirect happens in the context of the XHR.

One solution would be to make XHR to your controller and it would return a URL the client has to follow to.

Another would be to not make an XHR and use a plain link to your action.

Either way, you should make sure that you don't request GitHub URL from JS. It has to be a plane HTTP(s) request.

Webpacker changed from using .babelrc to babel.config.js between major versions 3 and 4. (Here is a link to the changelog where that is mentioned.) If this error pops up after the upgrade, it likely means that the legacy .babelrc file is still in the root of the Rails app. The solution is to delete .babelrc.

I think I see what's going on. In your Dockerfile, change your DB_URL from: mysql:// to mysql2://

You are loading the mysql2 gem, but indicating to ActiveRecord that you want to use a connection via the mysql gem.

This is probably and error with the stylesheet_link_tag and stylesheet_pack_tag, check out your layout files probably you are including sass files and you are using stylesheet_link_tag, this is breaking your code given that as I understand you can just link plane css files. so if you are including sass files use the stylesheet_pack_tag