rails - how to refresh an association after a save

Question

I have a category with a list of items. The items have a position and the category has a relationship has_many :items, :order => \"position\". When a user updates a position

Answer 1

For single-item associations:

book.reload_author

For other associations:

author.books.reload

http://guides.rubyonrails.org/association_basics.html#controlling-caching

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In older versions of rails, before Rails 5, you could pass true to an association method as the first parameter to make it reload: author.books(true).