similar to: Newbie question on id

Hi, I would like to figure out how to determine what the id of the last element in a table is. Is there an equivalent to the Table.find() method which will tell me the number of elements in a table? also, maybe more importantly, where are the available methods on tables documented? What i am trying to do is to increment the id and work through a table and check whether the id i am currently

There is a table: execute (<<-SQL) CREATE TABLE "tasks" ( "id" serial primary key, "number" serial, "version" integer DEFAULT 0 NOT NULL, "latest_version" boolean DEFAULT ''t'' NOT NULL, "hidden" boolean DEFAULT ''f'' NOT NULL, "type" character varying (1) NOT

Hiall, Unfortunately I just can''t find out how to setup a default selected value when using collection_select. My call is like so: <%= collection_select(:consultant, :lastname, @consultants, :id, :lastname, { :selected => @current_consultant.id } ) %> which is not working, I debugged so far that I know that @current_consultant.id contains the correct value. Any tips? cheers

Hi, I''m using scriptaculous to provide an auto complete textbox - and it works perfectly - but I was wondering if there was anyway to let users navigate the choices using the keyboard i.e the curor keys as opposed to having to use the mouse? Apart from that it''s perfect! :) Cheers, Pete -- Posted via http://www.ruby-forum.com/.

I''m trying desperately to get visuall effects callbacks working in rjs templates to no avail What I''m trying to do is fade an image, change the div with the image to a new image, and then fade the new image back in. How would I go about this in RJS Here''s a simple line from my rjs that I can''t get to work. It is not using callbacks so the

Hi there, I''ve been trying to paginate over a list of members that all share a tag in common using the acts_as_taggable plugin. The regular way of paginating over a collection doesn''t seem to work with acts_as_taggable. Here''s what my method looks like that takes in a tag name, finds all the members that share the tag and then displays all the members. Nothing too fancy

Hi, I have the following problem that I can''t seem to figure out. I want to able to fetch some text from my database record in my controller, and then add two links within the text and then send that back to the view to get rendered so that the two links appear as links and when clicked on, they''d basically call the corresponding action for the link. Would anybody know how to

Hello, how can I check if a destroy was successful? Is the object only frozen if deleted or do I have to do an additional find to see if there is a record left? What happens if an after_destroy callback returns false? Is there always a rollback? Markus

Trying to do first project in Ruby on Rails, and I''m getting the dreaded nil object exception. I''ve reduced the code to what I think is the minimal case, and it''s still not working. Code presented below.. ---------------------------------------------------------------------- in "app/controllers/dashboard_controller.rb" class DashboardController <

hi, i have a situation where i have a list of options from which a user selects his options if its not in the list he/she selects Others/Not Present and a new textfield should pop up and the data entered there should be considered instead of dropdown. i have done this using javascript/dhtml but i was wondering how this can be done using pure rails i.e using some of the RoR apis?. i would

Is there some standard way to test migrations? It seems to me that an additional safeguard for migrations would be to test and see if applying the migrations to the test database allows one to reconstruct the structure of the development database. If you can''t, then there is an error in your migrations, most likely because someone hand-modified the database without generating a

I''ve got a couple of helper functions in my application_helper file that I would like to run from the console (for debugging). What is the correct way to invoke a helper from the console? _Kevin -- Posted with http://DevLists.com. Sign up and save your mailbox.

Hi, I am looking for ideas on how to remove the last item from a paginated page when a new item is inserted, thus leaving only 10 elements on the page. Currently I have a form that inserts with AJAX, but as expected, each post added to the page just increases the number of posts leaving 11 on a page that should only be displaying 10. I have unique ID''s for each post (e.g.

Announcing RJSCallback 0.1 The RJS Callback plugin is being developed to provide Ruby On Rails with the ability to easily call RJS templates for the various callbacks associated with AJAX function calls (e.g., :before, :loading, :complete). Currently this plugin automatically detects, loads, and renders RJS templates with specific names and inserts them in the appropriate spot in

I''ve been trying to use the ez_where plugin to create a dynamic finder. The structure looks somehing like this.. === controller === def list attribute_filter = params[:filter] @filter = Caboose::EZ::Condition.new :table do attribute <=> attribute_filter if attribute_filter end # ... do the find with the @filter # end === view === .... <%= link_to

I''ve got an action in my application controller that needs to call a shared RJS template. Typically it''s actually being called by subclasses of the application controller. I''ve tried this.. def action ...code.. render :partial => "shared/template" end with ''_template.rjs'' existing in the shared folder. The problem that crops

Caveat: this is not a discussion about *hosting* a rails app on windows. Anyway...Macs are everywhere you look when researching rails (demo vids, tutorials, and pictures from rails training classes). I''m interested in what the pros to using a Mac for rails development are (besides textmate). Is it more of a cultural thing, a what would 37 signals do thing, is it a unix thing, or

Hi, I am using the autocomplete for text field with ''Scriptaculous'' and it works perfectly fine in "new" action. All the examples I see are only for the "new" action. But doesn''t default to the selected value/text in "edit/show" action? Is this possible or should I write custom code for "edit/show" action? Thanks, Hari --

RJS templates are nifty. They let you put all sorts of fun effects all over your bland html pages without too much work. The link_to_remote function also lets you run scripts before, during, and after an AJAX call is run by using callbacks. There does not seem to be an equivalent method for running an RJS template before or during an action. Rendering it at the end is no problem. One

In asp you have an Application built-in object, which works just like the Session hash, but it lets you share information among all users of a given application. which is the rails equivalent??? and if there isn''t, how would you implement such a thing ? (there would be concurrency issues to take into account, in fact asp''s application object has some lock and unlock methods