router_params.md

Router params

This extension can be used to merge placeholder parameters that usually routers support (like get /users/:id) to the parameters hash added through the :params extension (which is automatically loaded if using :router_params).

This extension adds a transformation function named :router_paramsto the registry. Internally, it merges what is present in rack env's router.params key.

It automatically integrates with hanami-router.

Don't forget that you have to add yourself the :router_params transformation to the stack.

require 'web_pipe'

WebPipe.load_extensions(:router_params)

class MyApp
  include WebPipe

  plug :config, WebPipe::Plugs::Config.(
    param_transformations: [:router_params, :deep_symbolize_keys]
  )
  plug :this

  private

  def this(conn)
    # http://example.com/users/1/edit
    conn.params # => { id: 1 }
    # ...
  end
end