First problem and first mail

[mujahid khan]

Dear all Now i am a group member with you. I am trying to built a application with Ruby on Rails. Now i am facing some problems. I have created a table named regions. The primary key is region_id (not default id). when i insert data from view data has inserted but not displayed. My new.html code is: <h1>New region</h1> <% form_for(@region) do |f| %>   <%= f.error_messages %>   <p>     <%= f.label :region_type %><br />     <%= f.text_field :region_type %>   </p>   <p>     <%= f.label :region_name %><br />     <%= f.text_field :region_name %>   </p>   <p>     <%= f.label :region_country %><br />     <%= f.text_field :region_country %>   </p>   <p>     <%= f.label :region_parent %><br />     <%= f.text_field :region_parent %>   </p>   <p>     <%= f.submit 'Create' %>   </p> <% end %> <%= link_to 'Back', regions_path %> after submitting the page shows a error: ActiveRecord::RecordNotFound in RegionsController#show Couldn't find Region without an ID .... ..... Request Parameters: {"id"=>"0"} but there is no field named id in my database table. the show method in my regions_controller file is:  def show     @region = Region.find(params[:region_id])     respond_to do |format|       format.html # show.html.erb       format.xml  { render :xml => @region }     end   end i have generated the files using scaffold. please give me the solution. i don't know from where id is passing as a parameter. from a new member mujahid

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[S. M. Sohan]

Dear Mr. Mujahid:

I see two issues here:

1. The default routing system in rails maps urls like /regions/1 params = {:id => 1} so, although you have the primary key region_id this is not the case for the params hash. You could simply use Region.find(params[:id]).
2. However, if you are using auto increment ids, I think most databases start the ids at 1. So, in the example you gave, I see the id has a value=0. Can you double check if you actually have a record in the table with region_id = 0?

Hope it solves your problem.

Thank you.

--
Sohan
http://www.ucalgary.ca/~smsohan | http://smsohan.blogspot.com
skype:smsohan | gtalk:sohan39 | ph: 403-351-0718

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[mujahid khan]

Dear Mr. Sohan Thank you for your reply. But region_id is created by a trigger. The region_id is for Division, District and PS. Division ID start from: 1000000, District ID start from: 1100000 and PS ID start from:1110000. so i don't know from where id is passing as a parameter. if it default how can i change it? please help me. thank you --- On Wed, 27/1/10, S. M. Sohan <soh...@gmail.com> wrote:

[Ashrafuzzaman]

Hi Mr. Mujahid,

In addition to what Sohan vai said, I think if you want to use a custom primary key in rails you need to specify that in the model, like

class Region < ActiveRecord::Base

  set_primary_key :region_id
  ...
end

Pleas check http://www.edwardbenson.com/2009/06/12/custom-primary-keys-with-activerecord/

Thanking,
A.K.M. Ashrafuzzaman
http://www.ashrafuzzaman.com/
Contact No: +46720413223
Blog:http://jitu-blog.blogspot.com/

[mujahid khan]

Dear Mr. Ashrafuzzaman Thank you toooo much. problem solved within 30 seconds!!!. mujahid --- On Wed, 27/1/10, Ashrafuzzaman <ashrafuz...@gmail.com> wrote:

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[Ashrafuzzaman]

glad to help :)