CODEWITHSUNDEEP
ruby-on-rails
MH Sagar
MH Sagar

Reputation: 136

getting undefined method `include?' for nil:NilClass

I'm trying to follow a tutorial to create a messaging app but while creating a conversation controller I faced an error. My goal is to check whether a conversation between the current_user and the selected user exists or not. If it doesn't exist then I want to create a new one. but when I tried this I got the error from the bellow. It would be a big help.

The error log

 NoMethodError (undefined method `include?' for nil:NilClass):

 app/controllers/conversations_controller.rb:30:in `conversated?'

My controller from Conversations

def create
  @conversation = Conversation.get(current_user.id, params[:user_id])

  add_to_conversations unless conversated?
end

private


def conversated?
  session[:conversations].include?(@conversation.id)
end

Let me know if you need any other parts added to the question. Thanks in advance.

Upvotes: 0

Views: 1704

Answers (1)

Hass
Hass

Reputation: 1636

When you are first calling session[:conversations], the value seems to be nil and such include? is not a method that nil knows how to respond to. I think you can make a small tweak in that check like so:

def conversated?
  session[:conversations]&.include?(@conversation.id)
end

The & is a safe navigation operator where the method is only called if a value exists.

Upvotes: 1

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