class RuboCop::Cop::AnyCable::InstanceVars


end
end
stream_from post
post = Post.find(params)
def subscribed
class MyChannel < ApplicationCable::Channel
# good
end
end
stream_from @post
@post = Post.find(params)
def subscribed
class MyChannel < ApplicationCable::Channel
# bad
@example
Checks for instance variable usage inside subscriptions.

def find_nested_ivars(node, &block) 

def find_nested_ivars(node, &block)
  node.each_child_node do |child|
    if child.ivasgn_type? || child.ivar_type?
      yield(child)
    elsif child.children.any?
      find_nested_ivars(child, &block)
    end
  end
end

def on_class(node) 

def on_class(node)
  find_nested_ivars(node) do |nested_ivar|
    add_offense(nested_ivar)
  end
end