Rails，Devise：如果用户登录时使用用户ID创建，否则不添加

Question

I have a streams controller and I am using Devise. Users can create streams either with (than the stream will have the id of the user in the db) or without account(than its a guest stream so to say). Currently I have the following create method:

def create
  @stream = current_user.streams.build(params[:name])
  if @stream.valid?
    @stream.save
    redirect_to c_path(@stream.name)
    flash[:notice] = "blabla"
  else
    redirect_to root_path
  end
end

But that doesnt work for guests, since I use the current_user. Now my plan was to create a if else (if signed in use the current_user, else not).

How would I do that?

Thanks!

Answer 1

It's quite simple, you can use user_signed_in? helper:

if user_signed_in?
  @stream = current_user.streams.build(params[:name])
else
  @stream = Stream.new(params[:name])
end

BTW make sure you pass valid params while building object.

Answer 2

Devise has a user_signed_in? method. So you could do this:

if user_signed_in?
  @stream = current_user.streams.build(params[:name])
else
  @stream = Stream.new(params[:name])
end