Add Generate A Rails App From The Main Branch as a Rails TIL

Author: jbranchaud

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1439 TILs and counting..._
+_1440 TILs and counting..._
 
 ---
 
@@ -897,6 +897,7 @@ _1439 TILs and counting..._
 - [Find Or Create A Record With FactoryBot](rails/find-or-create-a-record-with-factory-bot.md)
 - [Find Records With Multiple Associated Records](rails/find-records-with-multiple-associated-records.md)
 - [Force All Users To Sign Out](rails/force-all-users-to-sign-out.md)
+- [Generate A Rails App From The Main Branch](rails/generate-a-rails-app-from-the-main-branch.md)
 - [Generating And Executing SQL](rails/generating-and-executing-sql.md)
 - [Get A Quick Approximate Count Of A Large Table](rails/get-a-quick-approximate-count-of-a-large-table.md)
 - [Get ActiveRecord Attribute Directly From Database](rails/get-active-record-attribute-directly-from-database.md)

rails/generate-a-rails-app-from-the-main-branch.md

@@ -0,0 +1,27 @@
+# Generate A Rails App From The Main Branch
+
+Typically you are going to want to generate a Rails app using some officially
+released version of the framework. These releases have been thoroughly tested,
+have received patches, and can guarantee a certain level of stability.
+
+However, if you are wanting to try out the latest, unreleased features, you may
+want to generate a fresh Rails app based off the current state of the `main`
+branch of the `rails` repository.
+
+To do this, add the `--main` flag:
+
+```bash
+$ rails new rails_app_on_main --main
+```
+
+Toward the top of your app's `Gemfile`, you'll see that `rails` is pointed to
+the `main` branch of their repo:
+
+```ruby
+# Use main development branch of Rails
+gem "rails", github: "rails/rails", branch: "main"
+```
+
+See `rails new --help` for more details
+
+[source](https://x.com/gregmolnar/status/1832720168264286571)