# Problem With Active Record. Associations Showing Error ..ple **URL:** \ **Category:** Rails\ **Created:** [September 17, 2010, 9:45am UTC](https://www.ruby-forum.com/t/problem-with-active-record-associations-showing-error-ple/195120 "2010-09-17T09:45:48Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![sudhirsb2003](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dfb087/32.png) [@sudhirsb2003](https://www.ruby-forum.com/u/sudhirsb2003)\ **Post date:** [September 17, 2010, 9:45am UTC](https://www.ruby-forum.com/t/problem-with-active-record-associations-showing-error-ple/195120/1 "2010-09-17T09:45:48Z")
i am stuck somewhere with The Acrive record association . whenever i try to get the value from another table it gives me the foolowing error “undefined method `journal\_name’ for nil:NilClass” MY Controller def index @ledgers = Ledger.find(:all) @finaccounts = Finaccount.find(:all) @journels = Journel.all respond\_to do |format| format.html format.pdf { render :layout =\> false } end view: ``` <%=h ledger.journel.journal_name %> ``` Models : 1. Journel class Journel \< ActiveRecord::Base has\_many :ledgers end 1. class Ledger \< ActiveRecord::Base belongs\_to :journel end ---
**Author:** ![sudhirsb2003](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dfb087/32.png) [@sudhirsb2003](https://www.ruby-forum.com/u/sudhirsb2003)\ **Post date:** [September 17, 2010, 11:07am UTC](https://www.ruby-forum.com/t/problem-with-active-record-associations-showing-error-ple/195120/2 "2010-09-17T11:07:21Z")
Apparently one or more of your ledgers doesn’t have a journel? Try: \<%=h ledger.journel.journal\_name if ledger.journel %\> to see the ones that don't have journels. ---
**Author:** ![sudhirsb2003](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dfb087/32.png) [@sudhirsb2003](https://www.ruby-forum.com/u/sudhirsb2003)\ **Post date:** [September 17, 2010, 11:41am UTC](https://www.ruby-forum.com/t/problem-with-active-record-associations-showing-error-ple/195120/3 "2010-09-17T11:41:54Z")
Thanks For the Help Heinz S… But i need To Know Is there anything with rails 2.3.5 because to check wheather i have made any mistake in my application i created a sample application , and again it was the same error i got . waiting for your reply and one more thing …i am only a couple of months old to Ruby On rails .so please if possible suggest me how to make the associations between tables in rails. ---
**Author:** ![sudhirsb2003](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dfb087/32.png) [@sudhirsb2003](https://www.ruby-forum.com/u/sudhirsb2003)\ **Post date:** [September 17, 2010, 11:55am UTC](https://www.ruby-forum.com/t/problem-with-active-record-associations-showing-error-ple/195120/4 "2010-09-17T11:55:51Z")
If you are much interested in Rails Associations means, refer these URLs. > **[Active Record Associations — Ruby on Rails Guides](https://guides.rubyonrails.org/association_basics.html)** > > Active Record AssociationsThis guide covers the association features of Active Record.After reading this guide, you will know: How to declare associations between Active Record models. How to understand the various types of Active Record... > **[ActiveRecord::Associations::ClassMethods](https://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html)** > > Associations are a set of macro-like class methods for tying objects together through foreign keys. – Regards, T.Veerasundaravel. [http://tinyurl.com/25vma7h](http://tinyurl.com/25vma7h) @veerasundaravel Sudhir V. wrote: > Thanks For the Help Heinz S… > But i need To Know Is there anything with rails 2.3.5 because to check > wheather i have made any mistake in my application i created a sample > application , and again it was the same error i got . > waiting for your reply > and one more thing …i am only a couple of months old to Ruby On rails > .so please if possible suggest me how to make the associations between > tables in rails. ---
**Author:** ![sudhirsb2003](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dfb087/32.png) [@sudhirsb2003](https://www.ruby-forum.com/u/sudhirsb2003)\ **Post date:** [September 17, 2010, 12:01pm UTC](https://www.ruby-forum.com/t/problem-with-active-record-associations-showing-error-ple/195120/5 "2010-09-17T12:01:39Z")
Sorry But I guess I have read all The Associations …the only thing i want to know is there any problem with rails 2.3.5 because when i make the associations in 2.3.5 i get the same error undefined method `some method’ for nil:NilClass" Veera S. wrote: > If you are much interested in Rails Associations means, refer these > URLs. > > [Active Record Associations — Ruby on Rails Guides](http://guides.rubyonrails.org/association_basics.html) > [ActiveRecord::Associations::ClassMethods](http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html) > > – > Regards, > > T.Veerasundaravel. > [http://tinyurl.com/25vma7h](http://tinyurl.com/25vma7h) > @veerasundaravel > > Sudhir V. wrote: > > > Thanks For the Help Heinz S… > > But i need To Know Is there anything with rails 2.3.5 because to check > > wheather i have made any mistake in my application i created a sample > > application , and again it was the same error i got . > > waiting for your reply > > and one more thing …i am only a couple of months old to Ruby On rails > > .so please if possible suggest me how to make the associations between > > tables in rails. ---
**Author:** ![sudhirsb2003](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dfb087/32.png) [@sudhirsb2003](https://www.ruby-forum.com/u/sudhirsb2003)\ **Post date:** [September 17, 2010, 12:20pm UTC](https://www.ruby-forum.com/t/problem-with-active-record-associations-showing-error-ple/195120/6 "2010-09-17T12:20:26Z")
On Fri, Sep 17, 2010 at 3:31 PM, Sudhir V. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)wrote: > Sorry But I guess I have read all The Associations …the only thing i > want to know is there any problem with rails 2.3.5 because when i make > the associations in 2.3.5 i get the same error > undefined method `some method’ for nil:NilClass" You can use “rails console” to start up the RAILS console and look up the values of various objects and make a decision why you are getting null. Most probable reason why you are getting null is that “journel\_id” value is not set in Ledger records. In RAILS console, do: > Ledger.first > …observe the field values…, look wheher journel\_id has valid integer > Ledger.first.journel > …if you get null, then, journel\_id is not correct. try to set it to a > valid jourenl > lg = Ledger.first > lg.journel = Journel.first > lg.save! > Ledger.first.jourenl > …now you should not see null… > > Regards, > > > > > application , and again it was the same error i got . > > > “Ruby on Rails: Talk” group. > > > To post to this group, send email to removed\_email\_address@domain.invalid. > > > To unsubscribe from this group, send email to > > > removed\_email\_address@domain.invalid[removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) > > > . > > > For more options, visit this group at > > > [http://groups.google.com/group/rubyonrails-talk?hl=en](http://groups.google.com/group/rubyonrails-talk?hl=en). – Srikanth S. [http://www.srikanthps.com](http://www.srikanthps.com) @srikanthps ---
**Author:** ![sudhirsb2003](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dfb087/32.png) [@sudhirsb2003](https://www.ruby-forum.com/u/sudhirsb2003)\ **Post date:** [September 17, 2010, 12:24pm UTC](https://www.ruby-forum.com/t/problem-with-active-record-associations-showing-error-ple/195120/7 "2010-09-17T12:24:32Z")
On Sep 17, 11:01 am, Sudhir V. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Sorry But I guess I have read all The Associations …the only thing i > want to know is there any problem with rails 2.3.5 because when i make > the associations in 2.3.5 i get the same error > undefined method `some method’ for nil:NilClass" Unlikely. As Heinz said, the most likely explanation is that some of your ledgers don’t have a journel. Fred ---
**Author:** ![sudhirsb2003](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/dfb087/32.png) [@sudhirsb2003](https://www.ruby-forum.com/u/sudhirsb2003)\ **Post date:** [September 17, 2010, 12:22pm UTC](https://www.ruby-forum.com/t/problem-with-active-record-associations-showing-error-ple/195120/8 "2010-09-17T12:22:15Z")
I doubt there’s a problem with Rails 2.3.5 Fire up the console and try following: ledger = Ledger.first ledger.journel = Journel.first ledger.journel.journal\_name This should work and if so the ledgers you’re calling in the view just doesn’t have a journel. If not something’s wrong with the whole thing 🙂