First argument in form cannot contain nil or be empty Hartl's Rails 4 Tutorial

Question

I'm working through Michael Hartl's Rails tutorial, and I'm running into an issue in section 7.3.3. I receive this error message: ``` ArgumentError in Users#new Showing /Users/Anuraag/rails_projects/sample_app/app/views/users/new.html.erb where line #6 raised: First argument in form cannot contain nil or be empty ``` when I run the following rspec: ``` bundle exec rspec spec/requests/user_pages_spec.rb -e "signup with invalid information" ``` at the following line: ``` <%= form_for(@user) do |f| %> ``` Here is my code. Please also let me know how I should improve this question if I'm not framing it well: I'm pretty new to StackOverflow as well app/views/users/new.html.erb: ``` <% provide(:title, 'Sign up') %>

Sign up

<%= form_for(@user) do |f| %> <%= render 'shared/error_messages' %> <%= f.label :name %> <%= f.text_field :name %> <%= f.label :email %> <%= f.text_field :email %> <%= f.label :password %> <%= f.password_field :passwo…

Accepted Answer

In your `new.html.erb` you have specified `form_for(@user)` that means you need to have some value in instance variable `@user` before calling the `new` action.

You can do it in two ways :

one way is define an action `new` in your controller which would be called before rendering your `new.html.erb` layout. For eg:

```
def new
  @user = User.new
end
```

other way is that in your form itself you could specify something like

```
<%= form_for(User.new) do |f| %>
```

Defining it in your `new` action is more standard way of doing it.

First argument in form cannot contain nil or be empty Hartl's Rails 4 Tutorial

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