Alternative respond formats

alter1.rb

respond_to(:json, :html) do |json, html|
  json { render :json => UserSessionPresenter.new(current_user)  }
  html { redirect_back_or_default root_path }
end

alter2.rb

format do |json, html|
  json { render :json => UserSessionPresenter.new(current_user)  }
  html { redirect_back_or_default root_path }
end

alter3.rb

format do
  json { render :json => UserSessionPresenter.new(current_user)  }
  html { redirect_back_or_default root_path }
end

alter4.rb

json { render :json => UserSessionPresenter.new(current_user)  }
html { redirect_back_or_default root_path }

classic.rb

respond_to do |format|
  format.json { render :json => UserSessionPresenter.new(current_user)  }
  format.html { redirect_back_or_default root_path }
end