Ensure blank rich text records aren't saved or required

app/models/action_text/rich_text.rb

@@ -6,6 +6,8 @@ class ActionText::RichText < ActiveRecord::Base
   belongs_to :record, polymorphic: true, touch: true
   has_many_attached :embeds
 
+  validate { errors.add(:body, "is missing") if body.blank? }
+
   before_save do
     self.embeds = body.attachments.map(&:attachable)
   end

lib/action_text/attribute.rb

@@ -37,7 +37,20 @@ module ActionText
         scope :"with_rich_text_#{name}", -> { includes("rich_text_#{name}") }
         scope :"with_rich_text_#{name}_and_embeds", -> { includes("rich_text_#{name}": { embeds_attachments: :blob }) }
 
-        after_save { public_send(name).save if public_send(name).changed? }
+        before_save do
+          # If there's no body set, we need to reset the rich text record such that it is not autosaved.
+          public_send("#{name}=", nil) if public_send(name).body.blank?
+        end
+
+        after_save do
+          rich_text = public_send(name)
+
+          if rich_text.changed? && rich_text.body.present?
+            rich_text.save
+          elsif rich_text.persisted? && rich_text.body.blank?
+            rich_text.destroy
+          end
+        end
       end
     end
   end

lib/action_text/content.rb

@@ -4,7 +4,7 @@ module ActionText
 
     attr_reader :fragment
 
-    delegate :blank?, :empty?, :html_safe, :present?, to: :to_s
+    delegate :blank?, :empty?, :html_safe, :present?, to: :to_html # Delegating to to_html to avoid including the layout
 
     def initialize(content = nil)
       @fragment = ActionText::Attachment.fragment_by_canonicalizing_attachments(content)

test/unit/content_test.rb

@@ -7,6 +7,19 @@ module ActionText
       assert_equal "Hello world", message.content.body.to_plain_text
     end
 
+    test "creating a model with rich text content will not create a rich text record" do
+      message = Message.create!(subject: "Greetings")
+      assert message.content.body.nil?
+    end
+
+    test "removing content removes the rich text record" do
+      message = Message.create!(subject: "Greetings", content: "<h1>Hello world</h1>")
+      
+      assert_difference -> { ActionText::RichText.all.count }, -1 do
+        message.update!(content: "")
+      end
+    end
+
     test "embed extraction" do
       blob = create_file_blob(filename: "racecar.jpg", content_type: "image/jpg")
       message = Message.create!(subject: "Greetings", content: ActionText::Content.new("Hello world").append_attachables(blob))