Question

• Given that I have a large form
• When the user submits it
• And the validation of the data fails
• Then the user is redirected to the previous page again
• And the form should contain the data that the user previously submitted

---

How can I achieve the last part? 😛
There is something like flash[] for the form_for helper?
I have to use AJAX?

Answer 1

As some of the comments have suggested, this can be the default behavior, if you’re using best practices.

Here’s an example of the new/create controller actions that should exhibit said behavior:

def new
  @model = MyModel.new
end

def create
  @model = MyModel.new(params[:my_model])

  if @model.save
    redirect_to my_models_url, :notice => "Success!"
  else
    flash.now[:error] = "There was an error"
    render :new
  end
end