Merge 295fe153ad into 0251157dc4

Hello, I've added a small blockquote below the description to indicate that this method of accessing an indefinite number of function arguments has been superseded by the use of the spread operator via rest parameters for ES6+ compatibility.

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).
 
-_1582 TILs and counting..._
+_1583 TILs and counting..._
 
 See some of the other learning resources I work on:
 - [Ruby Operator Lookup](https://www.visualmode.dev/ruby-operators)
@@ -993,6 +993,7 @@ See some of the other learning resources I work on:
 - [Define The Root Path For The App](rails/define-the-root-path-for-the-app.md)
 - [Delete Paranoid Records](rails/delete-paranoid-records.md)
 - [Demodulize A Class Name](rails/demodulize-a-class-name.md)
+- [Determine The Configured Primary Key Type](rails/determine-the-configured-primary-key-type.md)
 - [Different Ways To Add A Foreign Key Reference](rails/different-ways-to-add-a-foreign-key-reference.md)
 - [Disambiguate Where In A Joined Relation](rails/disambiguate-where-in-a-joined-relation.md)
 - [Empty find_by Returns First Record](rails/empty-find-by-returns-first-record.md)

javascript/accessing-arguments-to-a-function.md

@@ -5,6 +5,8 @@ an array-like object with all of the arguments to the function. Even if not
 all of the arguments are referenced in the function signature, they can
 still be accessed via the `arguments` object.
 
+> For ES6+ compatibility, the `spread` operator used via [rest parameters](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/rest_parameters) is preferred over the `arugments` object when accessing an abritrary number of function arguments.
+
 ```javascript
 function argTest(one) {
   console.log(one);

rails/determine-the-configured-primary-key-type.md

@@ -0,0 +1,35 @@
+# Determine The Configured Primary Key Type
+
+I noticed an interesting helper function in the database migration generated by
+`bin/rails active_storage:install`.
+
+```ruby
+class CreateActiveStorageTables < ActiveRecord::Migration[8.0]
+  def change
+    # Use Active Record's configured type for primary and foreign keys
+    primary_key_type, foreign_key_type = primary_and_foreign_key_types
+
+    # ...
+  end
+
+  private
+
+    def primary_and_foreign_key_types
+      config = Rails.configuration.generators
+      setting = config.options[config.orm][:primary_key_type]
+      primary_key_type = setting || :primary_key
+      foreign_key_type = setting || :bigint
+      [ primary_key_type, foreign_key_type ]
+    end
+end
+```
+
+The `primary_and_foreign_key_types` method looks in the generators config for
+the ORM (`:active_record`) to determine the configured `:primary_key_type`. By
+default this will return `nil`. This method then uses `:primary_key` as a
+fallback value which will be `bigint`. That's why the `foreign_key_type` falls
+back to `:bigint`.
+
+If desired, this can be manually configured in `config/application.rb` like
+shown in the [ActiveRecord Migrations
+docs](https://guides.rubyonrails.org/active_record_migrations.html#enabling-uuids-in-rails).