Never mind on allowing blank

More hassle than its worth. Just account for the fact that rich text can be blank instead, but continue to create the record.

app/models/action_text/rich_text.rb

@@ -6,10 +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)
+    self.embeds = body.attachments.map(&:attachable) if body.present?
   end
 
   def to_s

db/migrate/201805281641_create_action_text_tables.rb

@@ -2,7 +2,7 @@ class CreateActionTextTables < ActiveRecord::Migration[5.2]
   def change
     create_table :action_text_rich_texts do |t|
       t.string     :name, null: false
-      t.text       :body, limit: 16777215, null: false
+      t.text       :body, limit: 16777215
       t.references :record, null: false, polymorphic: true, index: false
 
       t.datetime :created_at, null: false

lib/action_text/attribute.rb

@@ -37,19 +37,8 @@ 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 }) }
 
-        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
+          public_send(name).save if public_send(name).changed?
         end
       end
     end

test/dummy/db/migrate/2018052816_create_action_text_tables.rb

@@ -2,7 +2,7 @@ class CreateActionTextTables < ActiveRecord::Migration[5.2]
   def change
     create_table :action_text_rich_texts do |t|
       t.string     :name, null: false
-      t.text       :body, limit: 16777215, null: false
+      t.text       :body, limit: 16777215
       t.references :record, null: false, polymorphic: true, index: false
 
       t.datetime :created_at, null: false

test/dummy/db/schema.rb

@@ -14,7 +14,7 @@ ActiveRecord::Schema.define(version: 2018_02_12_164506) do
 
   create_table "action_text_rich_texts", force: :cascade do |t|
     t.string "name", null: false
-    t.text "body", limit: 16777215, null: false
+    t.text "body", limit: 16777215
     t.string "record_type", null: false
     t.integer "record_id", null: false
     t.datetime "created_at", null: false

test/unit/content_test.rb

@@ -7,19 +7,11 @@ 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
+    test "without content" 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))