1 files changed, 43 insertions, 0 deletions
diff --git a/activerecord/test/models/contact.rb b/activerecord/test/models/contact.rb
new file mode 100644
index 0000000000..6e02ff199b
--- /dev/null
+++ b/activerecord/test/models/contact.rb
@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+
+module ContactFakeColumns
+  def self.extended(base)
+    base.class_eval do
+      establish_connection(adapter: "fake")
+
+      connection.data_sources = [table_name]
+      connection.primary_keys = {
+        table_name => "id"
+      }
+
+      column :id,             :integer
+      column :name,           :string
+      column :age,            :integer
+      column :avatar,         :binary
+      column :created_at,     :datetime
+      column :awesome,        :boolean
+      column :preferences,    :string
+      column :alternative_id, :integer
+
+      serialize :preferences
+
+      belongs_to :alternative, class_name: "Contact"
+    end
+  end
+
+  # mock out self.columns so no pesky db is needed for these tests
+  def column(name, sql_type = nil, options = {})
+    connection.merge_column(table_name, name, sql_type, options)
+  end
+end
+
+class Contact < ActiveRecord::Base
+  extend ContactFakeColumns
+end
+
+class ContactSti < ActiveRecord::Base
+  extend ContactFakeColumns
+  column :type, :string
+
+  def type; "ContactSti" end
+end