Improved generator for Active Record encryption and MySQL

Author: ankane

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.6.0 (unreleased)
+
+- Improved generator for Active Record encryption and MySQL
+
 ## 0.5.0 (2023-07-02)
 
 - Made Active Record and Active Job optional

README.md

@@ -21,7 +21,7 @@ rails generate authtrail:install --encryption=lockbox
 rails db:migrate
 ```
 
-To use Active Record encryption (Rails 7+, experimental), run:
+To use Active Record encryption (Rails 7+), run:
 
 ```sh
 rails generate authtrail:install --encryption=activerecord

lib/generators/authtrail/install_generator.rb

@@ -39,8 +39,11 @@ def identity_column
         when "lockbox"
           "t.text :identity_ciphertext\n      t.string :identity_bidx, index: true"
         else
-          # TODO add limit: 510 for Active Record encryption + MySQL?
-          "t.string :identity, index: true"
+          if encryption == "activerecord" && mysql?
+            "t.string :identity, limit: 510, index: true"
+          else
+            "t.string :identity, index: true"
+          end
         end
       end
 
@@ -49,7 +52,6 @@ def ip_column
         when "lockbox"
           "t.text :ip_ciphertext\n      t.string :ip_bidx, index: true"
         else
-          # TODO add limit: 510 for Active Record encryption + MySQL?
           "t.string :ip, index: true"
         end
       end
@@ -78,6 +80,14 @@ def lockbox_method
           "has_encrypted"
         end
       end
+
+      def mysql?
+        adapter =~ /mysql|trilogy/i
+      end
+
+      def adapter
+        ActiveRecord::Base.connection_db_config.adapter.to_s
+      end
     end
   end
 end