slim partials in Sinatra

_hello_world.slim

h1 Hello, World! Hello #{name}!

/ I initially had only `.render({}, locals)`, which meant that the partials didn't 
/ have access to any helper methods contained inside `OtherHelperMethods` (but `home.slim` did). 
/ Passing `self` into `.render`, as the first argument, fixes that (if you're curious 
/ about that, look up the `Tilt::Template #render` documentation. 

/ With this PartialsHelper, passing locals is optional, as is specifying a different 
/ path to the partial (relative to `settings.views`).

/ Hope you get as much use out of it as I do!

app.rb

require 'slim'
require 'slim/include'
require 'partials_helper'
require 'other_helper_methods'
    
class App < Sinatra::Base
  helpers do
    include PartialsHelper
    include OtherHelperMethods
  end

  get '/' do
    slim :home
  end
end

home.slim

== partial :_hello_world, locals: { name: 'Andrew' }

partials_helper.rb

module PartialsHelper
  def partial(name, path: '/partials', locals: {})
    Slim::Template.new("#{settings.views}#{path}/#{name}.slim").render(self, locals)
  end
end