Add specs configuration

spec/dummy/app/admin/authors.rb

@@ -0,0 +1,49 @@
+# frozen_string_literal: true
+
+ActiveAdmin.register Author do
+  menu priority: 1
+
+  permit_params :name, :email, :age, :avatar, profile_attributes: %i[id description _destroy]
+
+  index do
+    selectable_column
+    id_column
+    column :name
+    column :email
+    column :created_at
+    actions
+  end
+
+  filter :name
+  filter :created_at
+
+  show do
+    attributes_table do
+      row :name
+      row :email
+      row :age
+      row :avatar do |record|
+        image_tag url_for(record.avatar), style: 'max-width:800px;max-height:500px' if record.avatar.attached?
+      end
+      row :created_at
+      row :updated_at
+      row :profile
+    end
+    active_admin_comments
+  end
+
+  form do |f|
+    f.inputs do
+      f.input :name
+      f.input :email
+      f.input :age
+      f.input :avatar,
+              as: :file,
+              hint: (object.avatar.attached? ? "Current: #{object.avatar.filename}" : nil)
+    end
+    f.has_many :profile, allow_destroy: true do |ff|
+      ff.input :description
+    end
+    f.actions
+  end
+end