diff --git a/README.md b/README.md
index 6da4c7f..189f097 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ and pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://tinyletter.com/jbranchaud).
 
-_863 TILs and counting..._
+_864 TILs and counting..._
 
 ---
 
@@ -500,6 +500,7 @@ _863 TILs and counting..._
 - [Attribute Getter without the Recursion](rails/attribute-getter-without-the-recursion.md)
 - [Attribute Was](rails/attribute-was.md)
 - [Autosave False On ActiveRecord Associations](rails/autosave-false-on-activerecord-associations.md)
+- [Build A Hash Of Model Attributes](rails/build-a-hash-of-model-attributes.md)
 - [Capybara Page Status Code](rails/capybara-page-status-code.md)
 - [Cast Common Boolean-Like Values To Booleans](rails/cast-common-boolean-like-values-to-booleans.md)
 - [Change The Nullability Of A Column](rails/change-the-nullability-of-a-column.md)
diff --git a/rails/build-a-hash-of-model-attributes.md b/rails/build-a-hash-of-model-attributes.md
new file mode 100644
index 0000000..12ace8c
--- /dev/null
+++ b/rails/build-a-hash-of-model-attributes.md
@@ -0,0 +1,34 @@
+# Build A Hash Of Model Attributes
+
+Have you ever found yourself creating an `ActiveRecord` object with
+[FactoryBot](https://github.com/thoughtbot/factory_bot) with the sole purpose
+of turning it into a hash of attributes?
+
+```ruby
+> FactoryBot.build(:book).attributes
+{ "id"=>nil, "title"=>"Fledgling", "genre"=>"fiction" }
+```
+
+FactoryBot has a built-in method for doing this:
+
+```ruby
+> FactoryBot.attributes_for(:book)
+{ title: "Fledgling", genre: "fiction" }
+```
+
+It also accepts any traits for that factory:
+
+```ruby
+> FactoryBot.attributes_for(:book, :published)
+{
+  title: "Fledgling",
+  genre: "fiction",
+  publication_year: 2005,
+  page_count: 362
+}
+```
+
+This is a handy way of build a base set of attributes when testing an API
+endpoint.
+
+[source](https://devhints.io/factory_bot)