Naive question

Rails
1

Got a naive question, and I don’t know what keywords to search for on
google.

I have a webform that needs to query a database in realtime with
javascript. So if I press a button, it will query a database and
return the result to the webpage without reloading the webpage. It
should use ajax.

I assume rails have some sort of ajax-y type of thing that makes this
query possible. What is this called? I don’t know what terms to type
into google.

2

the most simple way to do this would be link_to_remote
http://api.rubyonrails.org/classes/ActionView/Helpers/PrototypeHelper.html#M000958

this makes an ajax call to the controller/action on the server, which
then can make the db query and render the results.
but there are many commands and ways to do this, depending on your needs

3

To do what, exactly?

Quoting is handy!

Julian.

Learn Ruby on Rails! CHECK OUT THE FREE VIDS (LIMITED TIME) VIDEO #3
OUT APRIL 6
http://sensei.zenunit.com/

4

The thing you’re after is most likely observe_field. Things to
remember when using AJAX are that you need to include the default
javascripts in your layout, and to look at the log files a lot when
debugging it.

Using RJS templates is easier than using the :update argument on the
observe_field helper tag.

Julian.

Learn Ruby on Rails! CHECK OUT THE FREE VIDS (LIMITED TIME) VIDEO #3
OUT APRIL 6
http://sensei.zenunit.com/