Rails 3 many to many query condition

Question

I\'m trying to do a simple Post/Tags relation in rails 3. Everything working fine except when I want to query the Posts which are related to several tags. Basically I\'d like to

Answer 1

I'm stuck on the same problem. The squeel docuemtnation suggests this is possible. In the Compound Conditions section he lists three ways to do something similar.

Given

names = ['Ernie%', 'Joe%', 'Mary%']

Then you can do

Person.where('name LIKE ? OR name LIKE ? OR name LIKE ?', *names)

or

Person.where((['name LIKE ?'] * names.size).join(' OR '), *names)

or

Person.where{name.like_any names}

The documentation implies we can use AND instead of OR or like_all as opposed to like_any.

However I can't seem to get it to work for a habtm relationship. It keeps giving me undefined method 'call' for an instance of ActiveRecord.