Add Generate A Model as a Rails TIL

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).
 
-_1441 TILs and counting..._
+_1442 TILs and counting..._
 
 ---
 
@@ -897,6 +897,7 @@ _1441 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 Model](rails/generate-a-model.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)

rails/generate-a-model.md

@@ -0,0 +1,26 @@
+# Generate A Model
+
+The `rails` CLI comes with a variety of generators. Perhaps the mostly common
+one to use is the _model_ generator.
+
+The model generator will create a migration and a model file for the entity
+that you name. In the following example `Book` will result in a
+`app/models/book.rb` file as well as a migration file for a `books` table.
+These generators know the singular and plural conventions.
+
+At the end of the command is a series of field definitions containing the field
+_name_ and field _type_. These are used in the migration file for defining
+columns on the new table.
+
+```bash
+❯ bin/rails generate model Book title:string publication_date:date author:string
+      invoke  active_record
+      create    db/migrate/20240920223447_create_books.rb
+      create    app/models/book.rb
+      invoke    rspec
+      create      spec/models/book_spec.rb
+```
+
+You may also notice that an `rspec` action was invoked as part of this
+generator. That is because I have the `rspec-rails` gem in my project. That gem
+hooks into the model generator so that a model spec also gets generated. Handy!