Comments on: Easy Form Drop-Downs With Collection_Select

By: Trung

Trung — Thu, 30 Jul 2009 01:40:04 +0000

@ashes999: Thanks for your reply. I have tried with collection_select but no progress. So I have found another solution by using select. For examples:

select(“sales_agent”, “customer_id”, @customers.collect{|customer| [customer.name(params), id]})

With this, you can call any instance function with params.
Hope this help for somebody.

@Bryan: Have you tried to put “,” before {:selected => …} in your code?

Thanks and regards.

By: ashes999

ashes999 — Wed, 29 Jul 2009 17:09:41 +0000

@Brian: sorry, no clue
@Trung: I’m not sure. I assume if you put a function name, Rails will call the function and use the return value as the attribute. Why not try it, and let me know how it works out?

By: Trung

Trung — Wed, 29 Jul 2009 10:06:08 +0000

Hi,

I have a question:

What if “display_field” is a virtual attribute which contains parameters?

In your example, assume that to calculate the “name” attribute, we need to pass a parameter “language”. So how can we use the collection_select in this case?

Thank you in advance.

By: Bryan

Bryan — Tue, 23 Jun 2009 15:52:50 +0000

searcher.get_approver}) %>

By: Bryan

Bryan — Tue, 23 Jun 2009 15:51:30 +0000

On this helper, what would be the best way to select a default?

example
searcher.get_approver}) %>

This throws an error
Syntax error, unexpected ‘{‘, expecting ‘)’
… @approvers, :id, :full_name {:selected => searcher.get_appr…

I would also like an option for : “Create New Approver” which links to Approver.new

Any ideas would be appreciated.

On a secondary question;
I have on the same form, a set of radio-buttons. I would like the toggle to enable or disable this collection_select control

Thanks

By: Lex

Lex — Sat, 23 May 2009 04:57:32 +0000

The current signature is the following:

collection_select(object, method, collection, value_method, text_method, options = {}, html_options = {})

Sample usage (selecting the associated Author for an instance of Post, @post):

collection_select(:post, :author_id, Author.find(:all), :id, :name_with_initial, {:prompt => true})

Thanks for the article.

By: ashes999

ashes999 — Wed, 29 Apr 2009 10:48:24 +0000

@Justin: If you look at the original HTML, you’ll see: name=”sales_agent[customer_id]“. The Rails code generates equivalent HTML; it already follows the convention Rails knows, so it should automatically populate sales_agent[customer_id].

By: Justin

Justin — Wed, 29 Apr 2009 01:11:08 +0000

Okay, great, but this doesn’t explain at all how to use it. How do you get the selected option when you are in the controller? Rails documentation is significantly lacking in every aspect.