til/rails/build-a-hash-of-model-attributes.md

Build A Hash Of Model Attributes

Have you ever found yourself creating an ActiveRecord object with FactoryBot with the sole purpose of turning it into a hash of attributes?

> FactoryBot.build(:book).attributes
{ "id"=>nil, "title"=>"Fledgling", "genre"=>"fiction" }

FactoryBot has a built-in method for doing this:

> FactoryBot.attributes_for(:book)
{ title: "Fledgling", genre: "fiction" }

It also accepts any traits for that factory:

> FactoryBot.attributes_for(:book, :published)
{
  title: "Fledgling",
  genre: "fiction",
  publication_year: 2005,
  page_count: 362
}

This is a handy way of build a base set of attributes when testing an API endpoint.

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