Comments on: Targetting associated tables in an ActiveRecord conditions hash

By: Sean

Sean — Thu, 30 Apr 2009 12:34:37 +0000

That’s entirely possible. Try taking a look at the SQL that’s produced and see if it makes sense. You may need to use :joins instead of :include, I’ve never used this functionality on a polymorphic association.

By: Steve

Steve — Thu, 30 Apr 2009 04:40:37 +0000

The relationship I’m using is polymorphic – I wonder if there are issues with that . . .

By: Steve

Steve — Thu, 30 Apr 2009 04:15:23 +0000

I’m having the same trouble: Active Record is saying “unknown column”. If I build it the literal way with a string like: conditions => ‘entities.name . . .’ then it works just fine, so I don’t think it’s a problem with the model set-up. Any thoughts appreciated

By: Sean

Sean — Thu, 23 Apr 2009 18:15:36 +0000

Hi Federico,

Try :entity => {:name => “AFY”} instead of :entities => {:name => “AFY”}. Failing that, make sure your relationships are set up properly at the model level.

By: Federico

Federico — Thu, 23 Apr 2009 17:35:34 +0000

I have been trying to use hash as a conditions but it doesn’t seem to work. Here is my code.
documents = Document.find(:all, :include => :entity, :conditions => {:entities => {:name => “AFY”}})
I get the following error. “ActiveRecord::StatementInvalid: Mysql::Error: Unknown column ‘entity.name’ in ‘where clause’: SELECT * FROM `documents` WHERE (`entity`.`name` = ‘AFY’)”

What am i doing wrong? Also would it work if i have the include nested a level deeper? like so:
documents = Document.find(:all, :include => {:entity => :accesses}, :conditions => {:entities => {:accesses => {:user_id => user.id}}})

I’am on rails 2.3.2, thanks.

By: lolcatz

lolcatz — Thu, 05 Feb 2009 22:21:08 +0000

You should check out Ambition. It gives you more rubyish syntax.

By: Jonathan Soeder

Jonathan Soeder — Thu, 05 Feb 2009 20:01:49 +0000

Ever try Squirrel, from ThoughtBot?

http://thoughtbot.com/projects/squirrel

This allows you to pass a block to ActiveRecord’s find method

and do some really pretty queries in ruby.

By: nachokb

nachokb — Thu, 05 Feb 2009 19:42:25 +0000

Have a look at Searchlogic [1], it takes hash conditions to a new level…

– nachokb

[1] http://github.com/binarylogic/searchlogic