Friendly Id with UUID

Question

I have project with Rails 4.1. I need to implement url something like this .../items/. I know I can make it manually, but I'm too lazy for it.

Does everybody know how can I use friendly_id to get UUID for slug?

Thanks for answers.

Answer 1

You need to override the to_param method in the Item model and return the UUID of the instance.

The default to_param method returns the id of the object.

Answer 2

friendly_id

friendly_id basically just replaces your :id parameter with a :slug in the .find method for ActiveRecord. I think what you're asking is if you wanted to use the :uuid attribute for your lookups, you'll need to something like the following:

#app/models/your_model.rb
Class YourModel < ActiveRecord::Base
   friendly_id :uuid, use: [:slugged, :finders]
end

This will allow you to perform the following:

#config/routes.rb
resources :your_controller #-> domain.com/your_controller/:id

You'll be able to pass in your :uuid to the :id, both through the link_to method, and in the .find method too. Apart from that, I don't see what the issue would be?

Answer 3

Follow standard instructions and create slug column for your model.

Add friendly_id to your model:

extend FriendlyId
friendly_id :uuid, use: [:slugged, :finders]

We do not have uuid column for our model, but we can specify method which able to generate it if slug is not set yet.

def uuid
  slug || SecureRandom.uuid
end

Answer 4

I arrived here looking for how to use friendly_id with a table that has uuid primary keys.

For me, I was getting this error:

ActiveRecord::StatementInvalid in PostsController#create
PG::UndefinedFunction: ERROR: operator does not exist: integer = uuid LINE 1: ...type" = $1 AND "friendly_id_slugs"."sluggable_id" = "posts".... ^ HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.

The solution was to rollback the migration (rails db:rollback STEP=1), then go into the slugs migration and change this line

t.integer  :sluggable_id,   :null => false

to this

t.uuid  :sluggable_id,   :null => false

More info here.