Factory Bot

FactoryBot replaces fixtures in Rails by defining reusable factories mapped to models. You define factories to create consistent test objects, then call build or create in RSpec examples to generate the required data.

Dynamic attributes in FactoryBot are generated using sequences. Sequences provide unique computed values for fields like emails, ensuring consistent object creation without duplicate data conflicts across multiple test runs.

Traits and associations in FactoryBot allow you to compose complex data graphs. Traits define reusable model variations, while associations link factories together, enabling you to build interconnected objects with transient attributes and lifecycle callbacks.

Yes, FactoryBot integrates directly with RSpec workflows to replace static fixtures. It provides flexible syntax for defining factories, sequences, and traits, allowing you to maintain reusable test data patterns instead of managing rigid fixture files.

Transient attributes and callbacks in FactoryBot are used when you need to pass temporary data to a factory or trigger lifecycle events. They allow computed fields and conditional logic during object creation to support complex testing workflows.