Rails 4: "wrong number of arguments (2 for 1)" - ruby-on-rails

Question

I know this is a pretty standard error, but I could not figure out a solution to this particular solution from other questions.
I am following this coderwall tutorial about Creating a Scoped Invitation System for Rails.
I have four models, as follows:
class User < ActiveRecord::Base
has_many :administrations
has_many :calendars, through: :administrations
has_many :invitations, :class_name => "Invite", :foreign_key => 'recipient_id'
has_many :sent_invites, :class_name => "Invite", :foreign_key => 'sender_id'
end
class Calendar < ActiveRecord::Base
has_many :administrations
has_many :users, through: :administrations
has_many :invites
end
class Administration < ActiveRecord::Base
belongs_to :user
belongs_to :calendar
end
class Invite < ActiveRecord::Base
belongs_to :calendar
belongs_to :sender, :class_name => 'User'
belongs_to :recipient, :class_name => 'User'
end
And this is the migration for the Invite model:
class CreateInvites < ActiveRecord::Migration
def change
create_table :invites do |t|
t.string :email
t.integer :calendar_id
t.integer :sender_id
t.integer :recipient_id
t.string :recipient_role
t.string :token
t.timestamps null: false
end
end
end
The goal of the Invite model is to allow Users to invite other Users to join a particular Calendar.
The create Invite form is embedded in the Calendar edit view, as follows:
<h2>Edit <%= #calendar.name %> calendar</h2>
<%= render 'form' %>
<h2>Invite new users to <%= #calendar.name %> calendar</h2>
<%= form_for #invite , :url => invites_path do |f| %>
<%= f.hidden_field :calendar_id, :value => #invite.calendar_id %>
<%= f.label :email %>
<%= f.email_field :email %>
<%= f.label "Role" %>
<%= f.radio_button(:recipient_role, "Editor") %>
<%= f.label "Editor" %>
<%= f.radio_button(:recipient_role, "Viewer") %>
<%= f.label "Viewer" %>
<%= f.submit 'Send' %>
<% end %>
<%= link_to 'Show', calendar_path %> |
<%= link_to 'Back', calendars_path %>
Here is the corresponding Calendars#Edit:
def edit
#user = current_user
#invite = #calendar.invites.build
authorize #calendar
end
And here is the InvitesController:
class InvitesController < ApplicationController
def create
#invite = Invite.new(invite_params) # Make a new Invite
#invite.sender_id = current_user.id # set the sender to the current user
if #invite.save
InviteMailer.invite(#invite, new_user_registration_path(:invite_token => #invite.token)).deliver #send the invite data to our mailer to deliver the email
else
format.html { render :edit, notice: 'Invitation could not be sent.' }
end
end
private
def invite_params
params.require(:invite).permit(:email)
end
end
Last but not least, here is the InviteMailer:
class InviteMailer < ApplicationMailer
def invite(invite)
#link = new_user_registration_path invite_token: invite.token
mail to: invite.email, subject: "Calendy Invitation"
end
end
When I visit http://localhost:3000/calendars/3/edit and submit the Invite create form, I get the following error:
ArgumentError in InvitesController#create
wrong number of arguments (2 for 1)
class InviteMailer < ApplicationMailer
def invite(invite)
#link = new_user_registration_path invite_token: invite.token
mail to: invite.email, subject: "Calendy Invitation"
end
My instinct would be to replace:
InviteMailer.invite(#invite, new_user_registration_path(:invite_token => #invite.token)).deliver
With:
InviteMailer.invite(#invite).deliver
But I am not sure this is actually the right solution.
Any idea about how to fix this error?

Answer 1

May be changing the invite to allow an extra argument like below should work too
class InviteMailer < ApplicationMailer
def invite(invite, link)
#link = link
mail to: invite.email, subject: "Calendy Invitation"
end
end

Answer 2

My instinct would be to replace:
InviteMailer.invite(#invite, new_user_registration_path(:invite_token => #invite.token)).deliver
With:
InviteMailer.invite(#invite).deliver
Yes, that would be fine, since you're doing the same - your InviteMailer#invite stores this data itself in #link variable:
class InviteMailer < ApplicationMailer
def invite(invite)
#link = new_user_registration_path invite_token: invite.token
mail to: invite.email, subject: "Calendy Invitation"
end
end