Adding class to link_to causes error

Question

I have a sign up with facebook text link in my app. I tried to add class to this text link to turn this into a button.

In rails it's written like this to display that text.

= link_to_session

So, as a rule I added the following

= link_to_session 'sign up', class: 'button button-primary'

but it gave me an error...

wrong number of arguments (2 for 0)

How could I fix this...? Thank you for your time!

UPDATE sorry.. I'm not quite sure where to look at...

I looked at session controller and in controller following is written...

class SessionsController < ApplicationController

  def create
    auth = request.env["omniauth.auth"]
    user = User.find_by_auth(auth)
    if user.blank?
      if session[:user_id].present?
        # via token
        user = User.find(session[:user_id])
        user.definitive_by(auth)
      else
        # new user
        user = User.find_or_create_by_auth(auth)
      end
    else
      user.token = auth.credentials.token
      user.save!
    end
    session[:user_id] = user.id
    redirect_to root_url
  end

  def create_via_token
    session[:user_id] = params[:user_id]
    redirect_to '/auth/facebook'
  end

  def destroy
    session[:user_id] = nil
    redirect_to root_url
  end

end

Answer 1

Try the following

= link_to 'sign up', "write your path here", class: 'button button-primary'

Here session path should be present in your route.