Override FactoryBot association with cy.appFactories result

[chasedeanda]

In the FactoryBot docs they give a simple example on overriding associations by passing an existing one into the create command:

FactoryBot.define do
  factory :author do
    name { 'Taylor' }
  end

  factory :post do
    author
  end
end

eunji = build(:author, name: 'Eunji')
post = build(:post, author: eunji)

My attempt to recreate this in Cypress:

cy.appFactories([["build", "author", { name: "Eunji" }]]).then(
  ([author]) => {
    cy.appFactories([["build", "post", { author }]]);
  }
);

The command to build the post fails because author is returned as json and is not actually an instance of Author which throws an Author expected, got {...} which is an instance of Hash error in FactoryBot. Any guidance on using the results from a build command in a new build call?

[grantspeelman]

unfortunately you cannot access associations like that from Cypress.

You can either setup associations by setting the foreign key directly or by using transient attributes.

[grantspeelman]

Example of using foreign key

FactoryBot.define do
  factory :author do
    name { 'Taylor' }
  end

  factory :post do
    author_id { create(:author).id }
  end
end

then in Cypress

cy.appFactories([['create', 'author', { name: 'James' }]]).then((records) => {
  cy.appFactories([['create', 'post', { author_id: records[0].id }]]
});

[grantspeelman]

Example of transient attributes (My Preferred Approach)

FactoryBot.define do
  factory :author do
    name { 'Taylor' }
  end

  factory :post do
    transient do
      author_name { 'Taylor' }
    end
    author { create(:author, name: author_name ) }
  end
end

then in Cypress

cy.appFactories([['create', 'post', { author_name: 'James' }]]

[grantspeelman]

figured out a third way by using nested_atttributes 😃

Turn these into official docs : https://github.com/shakacode/cypress-on-rails/blob/ee2fcf447ba770efe55c9dcaf908acad0cc787e1/docs/factory_bot_associations.md

Let me know if one of these ways works for you.

[chasedeanda]

@grantspeelman Awesome I appreciate your quick response and detailed examples! I like your transient attributes approach, I think we can update our factories to make that work!