Question: In my application in user registration I have a country picker..

```
<%= select(:user, :country, options_for_select(@COUNTRIES)) %>

```

And I want to add a prompt as a first default value (something like "--- select country ---"). Where and how should I put this option?

Answer: 
```
collection_select(:product,
  :category_id,
  Category.all,    
  :id,    
  :title,    
  {:prompt => true}
)

collection_select(:product,    
  :category_id,    
  Category.all,    
  :id,    
  :title,    
  {:include_blank => 'Please Select'}
)

```

both of these result in the same html, but the first one will not include the 'Please Select' option when you return to edit the previously created Product
You can also give customized prompt value like this

```
select(:user, :country, options_for_select(@COUNTRIES), :prompt=>"select User name")

```