```ruby
class MovieSerializer < ActiveModel::Serializer
  attributes :id, :title, :gross, :release_date, :mpaa_rating, :description
end
```

Add has_many reviews to movie serializer so child reviews show up in reviews index json response
user
```ruby
class MovieSerializer < ActiveModel::Serializer
  attributes :id, :title, :gross, :release_date, :mpaa_rating, :description
  has_many :reviews
end
```
assistant