not able to do find on associations in rails3

rubyonrails-talk
1

I am using rails3 edge.

class user < AR has_many :books end

Following statement is failing in console.

User.first.books.find(:conditions => {:title => 'ror'})

ActiveRecord::RecordNotFound: Couldn't find Book without an ID

It is such a basic thing that I am sure can't fail.

Is it working fine for others?

Please test it with rails edge and not with beta3.

Thanks

2

I am using rails3 edge.

class user < AR has_many :books end

Following statement is failing in console.

User.first.books.find(:conditions => {:title => 'ror'})

Don't you need find(:all, :conditions....) or is that a rails 3 change?

Colin

3

No. It is not a rails3 thing. It was just me being stupid.

Can't believe I missed that. Spent so much time on this.

Thanks

4

I am using rails3 edge.

class user < AR

has_many :books

end

Following statement is failing in console.

User.first.books.find(:conditions => {:title => ‘ror’})

Nadal, the above syntax is marked for deprecation in Rails 3.1. Thus, I would recommend using the newer

interfaces. Thus, you can write the above by doing the following:

User.first.books.where( :title => ‘ror’ )

I would recommend taking a look at the following screen cast:

http://media.railscasts.com/videos/202_active_record_queries_in_rails_3.mov

Also, Pratik has an excellent post on the subject that you can find here:

http://m.onkey.org/2010/1/22/active-record-query-interface

Good luck,

-Conrad