POST: Functions in PostgreSQL and Rails Migrations

* Fixed Gemfile versions
* Updated footer link styling

Author: joshmfrankel

.tool-versions

@@ -1 +1,2 @@
-ruby 3.1.4
+ruby 3.4.2
+bundler 2.7.1

Gemfile.lock

@@ -1,106 +1,195 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.5)
-      public_suffix (>= 2.0.2, < 6.0)
-    ast (2.4.2)
-    base64 (0.1.1)
+    addressable (2.8.7)
+      public_suffix (>= 2.0.2, < 7.0)
+    ast (2.4.3)
+    base64 (0.3.0)
+    bigdecimal (3.2.2)
     colorator (1.1.0)
-    concurrent-ruby (1.2.2)
+    concurrent-ruby (1.3.5)
+    csv (3.3.5)
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
     eventmachine (1.2.7)
-    ffi (1.15.5)
+    ffi (1.17.2)
+    ffi (1.17.2-aarch64-linux-gnu)
+    ffi (1.17.2-aarch64-linux-musl)
+    ffi (1.17.2-arm-linux-gnu)
+    ffi (1.17.2-arm-linux-musl)
+    ffi (1.17.2-arm64-darwin)
+    ffi (1.17.2-x86-linux-gnu)
+    ffi (1.17.2-x86-linux-musl)
+    ffi (1.17.2-x86_64-darwin)
+    ffi (1.17.2-x86_64-linux-gnu)
+    ffi (1.17.2-x86_64-linux-musl)
     forwardable-extended (2.6.0)
-    google-protobuf (3.24.3)
+    google-protobuf (4.31.1)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.31.1-aarch64-linux-gnu)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.31.1-aarch64-linux-musl)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.31.1-arm64-darwin)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.31.1-x86-linux-gnu)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.31.1-x86-linux-musl)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.31.1-x86_64-darwin)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.31.1-x86_64-linux-gnu)
+      bigdecimal
+      rake (>= 13)
+    google-protobuf (4.31.1-x86_64-linux-musl)
+      bigdecimal
+      rake (>= 13)
     http_parser.rb (0.8.0)
-    i18n (1.14.1)
+    i18n (1.14.7)
       concurrent-ruby (~> 1.0)
-    jekyll (4.3.2)
+    jekyll (4.4.1)
       addressable (~> 2.4)
+      base64 (~> 0.2)
       colorator (~> 1.0)
+      csv (~> 3.0)
       em-websocket (~> 0.5)
       i18n (~> 1.0)
       jekyll-sass-converter (>= 2.0, < 4.0)
       jekyll-watch (~> 2.0)
+      json (~> 2.6)
       kramdown (~> 2.3, >= 2.3.1)
       kramdown-parser-gfm (~> 1.0)
       liquid (~> 4.0)
-      mercenary (>= 0.3.6, < 0.5)
+      mercenary (~> 0.3, >= 0.3.6)
       pathutil (~> 0.9)
       rouge (>= 3.0, < 5.0)
       safe_yaml (~> 1.0)
       terminal-table (>= 1.8, < 4.0)
       webrick (~> 1.7)
-    jekyll-compose (0.11.0)
+    jekyll-compose (0.12.0)
       jekyll (>= 3.7, < 5.0)
-    jekyll-feed (0.12.1)
+    jekyll-feed (0.17.0)
       jekyll (>= 3.7, < 5.0)
     jekyll-paginate (1.1.0)
-    jekyll-redirect-from (0.15.0)
+    jekyll-redirect-from (0.16.0)
       jekyll (>= 3.3, < 5.0)
-    jekyll-sass-converter (3.0.0)
-      sass-embedded (~> 1.54)
+    jekyll-sass-converter (3.1.0)
+      sass-embedded (~> 1.75)
     jekyll-seo-tag (2.8.0)
       jekyll (>= 3.8, < 5.0)
-    jekyll-sitemap (1.3.1)
+    jekyll-sitemap (1.4.0)
       jekyll (>= 3.7, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    json (2.6.3)
-    kramdown (2.4.0)
-      rexml
+    json (2.13.2)
+    kramdown (2.5.1)
+      rexml (>= 3.3.9)
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
-    language_server-protocol (3.17.0.3)
+    language_server-protocol (3.17.0.5)
+    lint_roller (1.1.0)
     liquid (4.0.4)
-    listen (3.8.0)
+    listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.4.0)
-    parallel (1.23.0)
-    parser (3.2.2.3)
+    parallel (1.27.0)
+    parser (3.3.9.0)
       ast (~> 2.4.1)
       racc
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (5.0.3)
-    racc (1.6.2)
+    prism (1.4.0)
+    public_suffix (6.0.2)
+    racc (1.8.1)
     rainbow (3.1.1)
-    rake (12.3.2)
+    rake (13.3.0)
     rb-fsevent (0.11.2)
-    rb-inotify (0.10.1)
+    rb-inotify (0.11.1)
       ffi (~> 1.0)
-    regexp_parser (2.8.1)
-    rexml (3.2.6)
-    rouge (4.1.3)
-    rubocop (1.56.3)
-      base64 (~> 0.1.1)
+    regexp_parser (2.11.2)
+    rexml (3.4.1)
+    rouge (4.6.0)
+    rubocop (1.79.2)
       json (~> 2.3)
-      language_server-protocol (>= 3.17.0)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.1.0)
       parallel (~> 1.10)
-      parser (>= 3.2.2.3)
+      parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.8, < 3.0)
-      rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.28.1, < 2.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.46.0, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.29.0)
-      parser (>= 3.2.1.0)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.46.0)
+      parser (>= 3.3.7.2)
+      prism (~> 1.4)
     ruby-progressbar (1.13.0)
     safe_yaml (1.0.5)
-    sass-embedded (1.63.3)
-      google-protobuf (~> 3.23)
-      rake (>= 10.0.0)
+    sass-embedded (1.90.0)
+      google-protobuf (~> 4.31)
+      rake (>= 13)
+    sass-embedded (1.90.0-aarch64-linux-android)
+      google-protobuf (~> 4.31)
+    sass-embedded (1.90.0-aarch64-linux-gnu)
+      google-protobuf (~> 4.31)
+    sass-embedded (1.90.0-aarch64-linux-musl)
+      google-protobuf (~> 4.31)
+    sass-embedded (1.90.0-arm-linux-androideabi)
+      google-protobuf (~> 4.31)
+    sass-embedded (1.90.0-arm-linux-gnueabihf)
+      google-protobuf (~> 4.31)
+    sass-embedded (1.90.0-arm-linux-musleabihf)
+      google-protobuf (~> 4.31)
+    sass-embedded (1.90.0-arm64-darwin)
+      google-protobuf (~> 4.31)
+    sass-embedded (1.90.0-riscv64-linux-android)
+      google-protobuf (~> 4.31)
+    sass-embedded (1.90.0-riscv64-linux-gnu)
+      google-protobuf (~> 4.31)
+    sass-embedded (1.90.0-riscv64-linux-musl)
+      google-protobuf (~> 4.31)
+    sass-embedded (1.90.0-x86_64-darwin)
+      google-protobuf (~> 4.31)
+    sass-embedded (1.90.0-x86_64-linux-android)
+      google-protobuf (~> 4.31)
+    sass-embedded (1.90.0-x86_64-linux-gnu)
+      google-protobuf (~> 4.31)
+    sass-embedded (1.90.0-x86_64-linux-musl)
+      google-protobuf (~> 4.31)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
-    unicode-display_width (2.4.2)
-    webrick (1.7.0)
+    unicode-display_width (2.6.0)
+    webrick (1.9.1)
 
 PLATFORMS
+  aarch64-linux-android
+  aarch64-linux-gnu
+  aarch64-linux-musl
+  arm-linux-androideabi
+  arm-linux-gnu
+  arm-linux-gnueabihf
+  arm-linux-musl
+  arm-linux-musleabihf
+  arm64-darwin
+  riscv64-linux-android
+  riscv64-linux-gnu
+  riscv64-linux-musl
   ruby
+  x86-linux-gnu
+  x86-linux-musl
+  x86_64-darwin
+  x86_64-linux-android
+  x86_64-linux-gnu
+  x86_64-linux-musl
 
 DEPENDENCIES
   jekyll (~> 4)
@@ -115,7 +204,7 @@ DEPENDENCIES
   webrick
 
 RUBY VERSION
-   ruby 3.1.4p223
+   ruby 3.4.2p28
 
 BUNDLED WITH
-   2.1.4
+   2.7.1

_includes/footer.html

@@ -58,12 +58,12 @@ <h2 class="FooterActions-title">Get in Contact with Me</h2>
       </div>
 
       <section class="Footer-actions-copyright">
-        <p>© 2011-{{ "now" | date: "%Y" }}+ Josh Frankel. {{ site.title }}. All rights reserved</p>
+        <p class="Footer-actions-copyright-author">© 2011-{{ "now" | date: "%Y" }}+ Josh Frankel. {{ site.title }}. All rights reserved</p>
         <p class="Footer-actions-copyright-small">All content, media, ideas, and code on this website is protected by copyright law and may not be reproduced, distributed,
             transmitted, cached, or otherwise used for training AI models, large language models (LLMs), large reasoning models (LRMs), machine learning systems,
             or other artificial intelligence applications without explicit written permission and proper attribution to the original author.
             Unauthorized use and/or duplication of this material is strictly prohibited.</p>
-        <p><a href="{{ site.github.url }}/license.txt">See full license for additional details.</a></p>
+        <p><a href="{{ site.github.url }}/license.txt" class="text-pale-night">See full license for additional details.</a></p>
       </section>
     </div>
   </div>

_posts/2025/2025-08-14-using-database-functions-in-ruby-on-rails-migrations.md

@@ -0,0 +1,24 @@
+---
+layout: post
+title: Using Database Functions in Ruby on Rails Migrations
+categories:
+  - today-i-learned
+tags:
+  - postgresql
+  - ruby on rails
+---
+
+Today I learned you can specify PostgreSQL functions within a Ruby on Rails migrations. I found this particularly useful for setting a random default value for a database column. Let's dig into a simple
+example of this concept.
+
+<!--excerpt-->
+
+```ruby
+add_column :table, :column, :text, default: -> { "('prefix-' || md5(random()::text) || 'suffix')" }, null: false, if_not_exists: true
+```
+
+The default uses block syntax and string interpolation in order to add a prefix and suffix to a random string. The **md5** and **random** functions come from PostgreSQL.
+
+Know of any other tricks using functions within migrations? I'd love to learn about them in the comments below.
+
+Thanks for reading!

_sass/_tailwindcss.scss

@@ -41,6 +41,10 @@
   color: #fff;
 }
 
+.text-pale-night {
+  color: $pale-night-text;
+}
+
 /**
  * Borders
  **/

_sass/components/_footer.scss

@@ -68,7 +68,7 @@ $smallWidth: 790px;
       }
     }
     &-copyright {
-      border-top: 1px solid $pale-light-gray;
+      border-top: 2px solid $pale-light-gray;
       margin-top: 25px;
 
       p {
@@ -77,12 +77,22 @@ $smallWidth: 790px;
         font-weight: 600;
       }
 
+      .Footer-actions-copyright-author {
+        text-align: center;
+      }
+
       .Footer-actions-copyright-small {
         color: $pale-night-text;
         font-size: 1rem;
         font-style: italic;
         line-height: 1.5;
       }
+
+      a {
+        &:hover {
+          color: lighten($pale-night-text, 10%);
+        }
+      }
     }
   }
 }