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Active Storage FixtureSet ↑

Fixtures are a way of organizing data that you want to test against; in short, sample data.

To learn more about fixtures, read the ActiveRecord::FixtureSet documentation.

YAML ↑

Like other Active Record-backed models, ActiveStorage::Attachment and ActiveStorage::Blob records inherit from ActiveRecord::Base instances and therefore can be populated by fixtures.

Consider a hypothetical Article model class, its related fixture data, as well as fixture data for related ActiveStorage::Attachment and ActiveStorage::Blob records:

# app/models/article.rb class Article < ApplicationRecord has_one_attached :thumbnail end 

# fixtures/active_storage/blobs.yml first_thumbnail_blob: <%= ActiveStorage::FixtureSet.blob filename: "first.png" %>

# fixtures/active_storage/attachments.yml first_thumbnail_attachment: name: thumbnail record: first (Article) blob: first_thumbnail_blob

When processed, Active Record will insert database records for each fixture entry and will ensure the Active Storage relationship is intact.

Methods
B
P
Included Modules

Class Public methods

blob(filename:, **attributes)

Generate a YAML-encoded representation of an ActiveStorage::Blob instance’s attributes, resolve the file relative to the directory mentioned by ActiveSupport::Testing::FileFixtures.file_fixture, and upload the file to the Service

Examples ↑

# tests/fixtures/active_storage/blobs.yml second_thumbnail_blob: <%= ActiveStorage::FixtureSet.blob( filename: "second.svg", ) %> third_thumbnail_blob: <%= ActiveStorage::FixtureSet.blob( filename: "third.svg", content_type: "image/svg+xml", service_name: "public" ) %>

Source: show | on GitHub 

# File activestorage/lib/active_storage/fixture_set.rb, line 66 def self.blob(filename:, **attributes) new.prepare Blob.new(filename: filename, key: generate_unique_secure_token), **attributes end

Instance Public methods

prepare(instance, **attributes)

Source: show | on GitHub 

# File activestorage/lib/active_storage/fixture_set.rb, line 70 def prepare(instance, **attributes) io = file_fixture(instance.filename.to_s).open instance.unfurl(io) instance.assign_attributes(attributes) instance.upload_without_unfurling(io) instance.attributes.transform_values { |value| value.is_a?(Hash) ? value.to_json : value }.compact.to_json end