devise_invitations

Allow multiple invitations on top of devise_invitable.

Basically devise_invitable, by design, can't handle multiple invitations, since it doesn't use any support table but creates a new hidden User for every invitation, storing there both the inviter (through the polymorphic column sent_by) and the token.

This means that one user is invitable once and only once. This means that you'll find many hidden Users that probably will never sign up your website.

So let's create a new table that allows an email address to be invited multiple times by different people, allowing the user to ignore them and sign up normally or, instead, choosing which invitation mail s?he wants to accept. Invitations are not deleted after the related user signs up the website, and they'll be flagged too (pending are all the invitations sent, accepted is an invitation that has been accepted by an user and ignored are the invitations ignored by the user since s?he accepted the one marked as accepted).

I know, in fact I'm creating nothing but a layer on top of it. As devise_invitations is not a replacement, devise_invitable is still needed (well, we could rid it off anyway, PRs are welcomed!)

Create a model called User, then run both Devise and devise_invitable on it, following their instructions.

Then, add gem 'devise_invitations' to your Gemfile and run $ bundle install.

You can install devise_invitations just by running $ bin/rails g devise_invitations:install and bin/rake db:migrate.

This is what's new in your project:

• A migration for a new table called invitations is created
• A has_many association for User (useful to fetch the sent invitations) is injected
• A new route for said action is injected as well

If you use RSpec and FactoryGirl you can run $ bin/rails g devise_invitations:specs to copy the specs for the new associations, controllers and models to your codebase. You can extend and customize them as you wish.

Now, you need an action to let your users invite other ones. Basically it's just

DeviseInvitations::Invitation.create!(email: params[:email], sent_by: current_user)

You can add new columns to the invitations table to add new new attributes too, like user_type, welcome_message or whatever you want. Create a new class InvitationsController that extends the original DeviseInvitations::InvitationsController, and override the private method #invitation_params to inject these additional attributes. Remember to edit the controller used for handling the invitations in the related route.

To modify the content of the invitation email, what you need is just a view called instructions (use the template engine you prefer) placed inside app/views/invitation_mailer/.

Locales are stored in config/locales/devise_invitations.en.yml.