Devise Omniauth undefined method omniauth_authorize_path
问题 I've noticed that when logging to Devise I have started to receive these error message. I'm using Devise 2.2.4 with Omniauth 1.1.4 and Omniauth-Facebook 1.4.1 Does anybody know what is the cause of this error? ActionView::Template::Error (undefined method `omniauth_authorize_path' for #<#<Class:0xb85e534>:0xb904e5c>): 21: <%- if devise_mapping.omniauthable? %> 22: <%- resource_class.omniauth_providers.each do |provider| %> 23: <% logger.info "hey #{provider} , dolphin and #{resource_name}" %>