Nested has_many :through problem with Rails 3

rubyonrails-talk
1

Hi,

Rails 3.0.3 Ruby 1.8.7

We've got a nested method we're trying to update for Rails 3. However, it appears to be generating invalid sql. The old Rails 2 method worked. What am I doing wrong?

# The tables in question are sites, photos, site_photos

# In the Site model has_many :photos, :through => :site_photos do   # Old method. This works.   #def dates_with_photos   # find :all, :select => 'distinct date_taken', :order => 'date_taken'   #end

  # Attempt at an updated version for Rails 3. This fails.   def dates_with_photos     order("date_taken").select("distinct(date_taken)").all   end end

# Example: Site.find(5).photos.dates_with_photos

# It generates invalid sql. This is the bit that's invalid: SELECT "photos".*, distinct(date_taken) FROM "photos";

Any ideas?

Regards,

Dan

2

I am experiencing the same problem as daniel

- has_many through association

- get invalid sql when try to use a scope with "select distinct": basically, the "select" i specify does not override the default implicit select of the has_many join, but instead gets appended to it (as in daniel's example)

Does anyone know if this is by design, or a bug?

Thanks

3

I'm guessing bug. As of Arel 2.0.6 I'm no longer getting invalid sql, but I'm not getting valid results either.

Dan

4

Disregard, it's still generating invalid sql.

Dan