controller action contains more than one model method call?

Question

I have a simple update action in a Rails 4 controller:

#more stuff here
def update
  if @user.update(user_params)
    flash[:notice] = "User #{@user.username} updated"
    redirect_to users_path
  else
    render 'edit'
  end
end
private
def set_user
  @user = User.find(params[:id])
end

However, RubyMine is warning about @user.update and @user.username:

This inspection warns if a controller action contains more than one model method call, after the initial .find or .new. It’s recommended that you implement all business logic inside the model class, and use a single method to access it.

I don't see more than one model method call here. Can some one explain what is going on?

EDIT - I have something similar in the create action without warns, so I believe there is something to do with user_params...

def create
  if @user.save
    flash[:notice] = "User #{@user.username} created"
    redirect_to users_path
  else
    render 'new'
  end
end

Answer 1

Assuming username is a method in model where you merge user first_name and last_name.

I guess @user.update(user_params) and @user.username are your both method calls. One that saves the model, another that sets the user full name in flash notice.

It's just a warning from rubymine that just recommends you some actions to do, not necessary to follow them.