In this series: Part 1: Practical Railway-Oriented Pipelines in Ruby Part 2: User input, errors and metadata Part 3: Extending pipelines Part 4: Middleware Part 5: Testing pipelines In the previous article in this series I showed how to pass extra metadata from one step to the next, including user input, errors and context data. This article expands on the previous ones by showing how to extend the pipeline with domain-specific steps and helpers.
