feat(active-admin): add index, show and edit Review

app/admin/reviews.rb

@@ -0,0 +1,43 @@
+ActiveAdmin.register Review do
+
+  # See permitted parameters documentation:
+  # https://github.com/activeadmin/activeadmin/blob/master/docs/2-resource-customization.md#setting-up-strong-parameters
+  #
+  # Uncomment all parameters which should be permitted for assignment
+  #
+  # permit_params :comment, :item_id, :user_id
+  #
+  # or
+  #
+  # permit_params do
+  #   permitted = [:comment, :item_id, :user_id]
+  #   permitted << :other if params[:action] == 'create' && current_user.admin?
+  #   permitted
+  # end
+  includes :item, :user
+
+  index do
+    selectable_column
+    id_column
+    column :item
+    column :user
+    actions
+  end
+
+  show do
+    attributes_table do
+      row :item
+      row :user
+      row :comment
+    end
+  end
+
+  form do |f|
+    f.inputs do
+      f.input :item_id
+      f.input :user_id
+      f.input :comment
+    end
+    f.actions
+  end
+end