Where is the code for Spree Master Variant Creation? - ruby-on-rails

I'm using Spree's 3-0 Stable Backend. I know that Master Variant get created after a new product gets created, but I cannot find the file/code where the Master Variant code gets triggered.
The resource controller had pretty generic create code and a redirect to the Product's url. Does anyone know where/how the Master Variant gets created?

Anddd, I found my own answer after posting. Funny how that works out.
For anyone in the future searching this, you have to look inside of the core gem rather than the backend. Variants get created after a Product gets created if the "option_values_hash" exists, which triggers the "build_variants_from_option_values_hash" method.
"Options_values_hash" and "build_variants_from_option_values_hash" can both be found at "spree/core/app/models/spree/product.rb ".

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How to create custom AR button

Does someone have any examples how to generate AR URL?
Reading Web SDK documentation, seems that there is no functionality to do that.
Found https://github.com/Roomle/roomle-button but not sure that`s still way to go since it has not been updated for 2 years.
If you are using the Roomle SDK you can use saveCurrentConfiguration to get the configuration id (hash) of the current configuration. Not sure what you used at the moment to obtain a configuration id but you need to call this in order to save it on the Roomle server and open it in another place.
Also make sure to set the configuratorId URL param when linking to the AR site.

MVC VS Template with Authorization: When is the database file created?

The template comes without database at first. When I launch the application some code must create the db obviously, because I check the appData folder and now it's there.
Can you tell me which part of the code creates it? Thanks. I have long looked at the code and I cannot figure it out.
I think the only answer possible is that entity framework creates the database automatically. But the strange thing is if I remove thee database it does not get recreated, I get an error that says it's missing it.

Create state for object in Rails

Firstly I'm sorry for my english. Ha ha
So, I'm learning to create sites with Ruby on Rails so I started with that framework. I stuck for a few hours because I do not find the right method for something that I try to do.
I try to create a crowdfunding site. I have successfully installed and configured ActiveAdmin and configured it to create projects. I would now like to add a condition into these projects. I would like 4 states: "Empty" when the project is created, but not all features are filled. "Upcoming" when it met all the requirements. And then when it is ready it should get "Upcoming" state. I want my project management panel to be represented on activeadmin. I have a select box that would change the project status to "Validate" or "No validate".
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Branch.io returns me a File Not Found

I'm trying the Branch.io API and I think I'm getting a weird problem because I'm not able to create my links properly: I can use the link for starting the app without parameter: this link http://4t3i.app.link/KDSYTMnSZs.
It works perfectly but as soon as I try to put some parameter following the doc for appending query parameters, it returns a File Not Found Webpage.
I tried:
https://4t3i.app.link/a/?&jobId=saucisse
https://4t3i.app.link/a?%24deeplink_path=article%2Fjan%2F123&%24fallback_url=https%3A%2F%2Fgoogle.com&channel=facebook&feature=affiliate&user_id=4562&name=Alex (that's the example they give)
I have the feeling I'm really missing something but no idea what. Is that so easy to add parameters: just a/ and then appending parameters??
Alex from Branch.io here:
We recently made a major back-end change to accommodate some new technical limitations that Apple imposed with iOS 9.3.1, and unfortunately it looks like we didn't fully update all our docs yet!
Your links are correct, but the /a is no longer necessary. So they would be:
https://4t3i.app.link?&jobId=saucisse
https://4t3i.app.link?%24deeplink_path=article%2Fjan%2F123&%24fallback_url=https%3A%2F%2Fgoogle.com&channel=facebook&feature=affiliate&user_id=4562&name=Alex
When you open these, you'll be able to see the link clicks coming through on this dashboard page
Thanks for noticing this. I'll make sure we get the documentation changedto reflect the new system.
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Debugging Django Admin Template Resolution

Can someone point me to the code or a way that I can say print to screen which admin template is being used?
It happens many a time when I am replacing a admin template for an model that I add the template and hit the page and bham... still the same template.
Usually its a case issue or something like that... but it takes me a while if I get stumped to realise what my issue is.
Can anyone suggest an approach, be it put print statements in django code to show which template is getting resolved?
Regards
Mark
Use the django-debug-toolbar, it has a tab that shows all the template_s_ (plural) that are used.
If you run Django's development server from the command line, you can definitely just use print statements to find out which template is being used. You can also use the FireBug plugin for Firefox to figure out what the server is sending back to you.

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