Define underlying type for enums to be always string

lib/typelizer/model_plugins/active_record.rb

@@ -28,6 +28,7 @@ def infer_types(prop)
         prop.type = @config.type_mapping[column.type]
         prop.comment = comment_for(prop)
         prop.enum = enum_for(prop)
+        prop.type = :string if prop.enum # Ignore underlying column type for enums
 
         prop
       end

spec/app/app/models/post.rb

@@ -1,5 +1,5 @@
 class Post < ApplicationRecord
   belongs_to :user
 
-  enum category: [:news, :article, :blog].index_by(&:itself)
+  enum category: { news: 1, article: 2, blog: 3 }
 end

spec/app/db/migrate/20240707052907_create_posts.rb

@@ -2,7 +2,7 @@ class CreatePosts < ActiveRecord::Migration[7.1]
   def change
     create_table :posts do |t|
       t.string :title
-      t.string :category
+      t.integer :category
       t.text :body
       t.datetime :published_at
       t.references :user, null: false, foreign_key: true