ActiveRacord::Base find does not support HAVING ?!

Rails
1

Hi,

I’m new to Ruby/Rails and trying to do something like:

options = {
:select=>‘t1.*, count(c2)’,
:joins=> ‘AS t1 LEFT JOIN t2 ON t1.ID=t2.t1_id’,
:group=> ‘t1.id’,
:having=> “count(c2) = #{my_var}”
}
T1.find(:all,options)

But I got the following error:
ArgumentError in T1Controller#action1
Unknown key(s): having

lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/core_ext/hash/keys.rb:48:in
assert_valid_keys' lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/base.rb:1325:invalidate_find_options’
lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/base.rb:376:in
`find’

Why is this unsupported?

Thanks in advance
Ronald